Automating z/VM, Announcing Ansible for z/VM - simple and available

[barton]

For those of you interested in automating z/VM, our simple APIs have 
been used by customers for years.  Now we are providing the Ansible pod 
/ playbooks for use for Ansible to interact safely and securely with 
z/VM.  No SMAPI, no Java, no extraneous Linux server required.   
Exciting stuff!


 "https//VelocitySoftware.com/ansible.html"

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Re: Suggestions on new learning

[barton]

Headed to the VM Workshop?  "vmworkshop.org"...

On 5/15/2022 8:33 AM, Jake Anderson wrote:

Hello

For the last 2 years I have been building golden image for Linux on zVM and
am confident in it. Are there any new courses that I can start learning so
that it will be useful for future.

Any suggestions are welcome

Jake

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Re: Has anyone managed to install OpenShift? How many resources?

[barton]

and is this an internal ibm site?

On 4/27/2021 5:01 AM, blanc369 wrote:

Hi,

We are running a cluster of 3master nodes each 16gb 4cpu, 3 worker nodes 16gb 
4cpu, 1 infra node 24gb 4cpu. In backend we have 9 IFL with smt2.

The biggest system load we usually see on Infra node, where elastic search is 
running, but in general cluster health is ok.

Regards


On 21. 4. 2021, at 20:44, Rick Barlow  wrote:

We are attempting to install OpenShift on z/VM. Based on the installation 
instructions, it requires a minimum of 3 IFLs (preferrably 6) running with SMT 
enabled, 3 control virtual machines with 16GB of memory, and 2 workers with 
12GB of memory. We are constantly running out memory and driving excessive 
paging rates. This is very reminiscent of previous offerings like IBM Director 
and CMA. I know that the IBM LinuxONE Community Cloud is using this. I am 
looking for other sites who have gotten it running.

Has anyone successfully installed OpenShift on there own system(s)?
How many resources did you have on the environment? IFLs? Memory?

Feel free to respond on the list or offline directly to me.

Thanks,
Rick

Rick Barlow
Senior z/VM Specialist
ri...@velocitysoftware.com
Velocity Software, Inc.
http://www.velocitysoftware.com



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Re: Elasticsearch and Openshift on zVM - Suffering from CPU steal ?

[barton]

If you would collect one minute CP MONITOR data, I would love to analyze 
it for you.  I've the best CP performance analysis tools at my disposal


On 2/6/2021 3:44 AM, Mariusz Walczak wrote:

Hello,



I hope someone can share the experience or put some light on the problem. I
will refer to elasticsearch as "ES" in this email.

We are running 2 Openshift clusters on 1 zVM LPAR (16 logical CPU , SMT2).



Cluster 1 (development workload):

3x Master node (each zLinux 8 vCPU) (VSWITCH-1 VLAN 1)

3x Worker node (each 10 vCPU) (VSWITCH-1 VLAN 1)

1x Infra node (6 vCPU) (VSWITCH-1 VLAN 1) ("ES" ON) (high CPU use)



Cluser 2 (no workload, just "ES" ON):

3x Master node (each zLinux 4 vCPU) (VSWITCH-2 VLAN 2)

4x Worker node (each 4 vCPU) (VSWITCH-2 VLAN 2)

2x Infra node (6 vCPU) (VSWITCH-2 VLAN 2) ("ES" on on each) (high CPU use)



Problem:

With "ES" OFF on both clusters, the batch time of APP1 is ~600 seconds.

With "ES" ON on both clusters, batch time is ~1200 seconds.



Sympthoms:

- high cpu steal on zLinux nodes (TOP) with elasticsearch active

- bad network response (git clone, downloading images)

- CPU steal drops if we shutdown elasticsearch


With "ES" ON: zVM perfkit LPAR CPU at ~60% . CEC IFL usage 40%.

Where do you expect the bottleneck and what is causing high CPU steal on
zLinux nodes ?

Some more info - there is Fluentd pod running on every cluster node and is
sending log data constantly (quite big amounts) to Infra node
(elasticsearch)



IBM gave a tip that, CPU steal is accounted to zLinux when VSWITCH is
processing network requests for this zLinux. If so, how can we solve this ?

- run guests on Direct Attached OSA ?

- split Nodes to different VSWITCHES ? (currently all nodes + DB running on
1 vswitch same VLAN)

- ?


The application we are using for testing, is split into 6 microservices
(processes). PROC1 is used to read file and insert data to DB. I saw that
CPU time (top) of PROC1 accounted when file is processed = 10 sec, but the
real time we have to wait to see this work done is from 60-300 seconds
(depending if ES is running)



So far everyone is just saying "you need more IFLs". But why do I need more
IFLs if I'm using 40% of CEC IFL capacity ?





Thanks you,

Mariusz

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mainframe metal to cloud in two days....

[barton]

We here at Velocity  Software have a really good story that has been 
presented at SHARE, GSE, VM Workshop, and others.  For those of you that 
missed it, and especially those that think building a cloud on the 
mainframe or on z/VM is complicated and messy, you might want to take a 
look at


"https://velocitysoftware.com/metaltocloud;.

From when our new z15 was turned over, 2 normal working days later, 
have 4-way SSI, RACF and the Velocity Software suite, and cloned 150 
Linux servers just to prove we could.  Easy, reliable, cloud, z/VM...


If you think managing a large (or small) z/VM complex is difficult and 
requires a lot of training and skills, not Check out the VICOM 
Infinity lunch and learn "zPRO V4 - Turbocharged Management for 
your Linux on Z Private Cloud" replay at


*Play recording* 
(1 
hr 6 mins)


Recording password: 363yTPCU




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Re: CP overhead of using FCP attached SCSI SAN

[barton]

I don't see how steal time and the scsi would be related. There's an old 
article about what steal time is at "http://velocitysoftware.com/STEAL.html;



On 11/4/2020 10:30 AM, Dave Jones wrote:

Hello, all.

I have a site that is using SCSI SAN (a V7000) to hold all z/VM
storagethe system z/VM and Linux software is installed on emulated
FBA dasd, and the Oracle database is stored on 360 or so SCSI disks,
attached via FCP.

What is the CP overhead of managing this?  The one Linux guest that is
running here reports a %steal of 15-17%, which I think is a bit high.
Could this be configured better?
Thanks, appreciate it.
DJ

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Cloud
703.237.7370 (Office) | 281.578.7544 (CELL)

INFORMATION TECHNOLOGY COMPANY

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Re: performance problems db2 after moving from AIX

[barton]

Diag 9C are low cost, Diag 44 not so much.  50 is a low number.


On 11/3/2020 12:27 PM, Grzegorz Powiedziuk wrote:

On Tue, Nov 3, 2020 at 1:58 PM Grzegorz Powiedziuk 
wrote:


Thanks Christian.
There is no pagging (swapping) here besides just regular kernel's house
keeping (vm.swappiness =5 )
rhel 7 doesn't give me diag_stat in the debug filesystem hmm

On Tue, Nov 3, 2020 at 12:37 PM Christian Borntraeger <
borntrae...@linux.ibm.com> wrote:


So you at least had some time where you paged out memory.
If you have sysstat installed it would be good to get some history data of
cpu and swap.

You can also run "vmstat 1 -w" to get an online you on the system load.
Can you also check (as root)
/sys/kernel/debug/diag_stat
2 times and see if you see excessive diagnose 9c rates.



In the performance monitor toolkit it shows around 12.000 diag x'9c' /s
and 50 x'44'
But at this time of a day everything is calm. i will check again tomorrow.
Lot's of diag x'9c' would indicate too many virtual cpus right?

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Re: AW: [EXTERN]-Re: IFL usage of Linux servers

[barton]

David, you might want to look at "http://velocitysoftware.com/smt.html; 
at what are the available metrics and how to use them for chargeback. 
Many of our Linux on z installations have a chargeback model, and SMT-2 
required some updates to both the model and how to understand the metrics.



On 10/28/2020 11:29 AM, Mittelstädt, David wrote:

Hi Bill,

Thanks for the fast replay. I will read the infos in the given URL tomorrow. We 
are using SMT-2. I ran a q multithreading in z/VM and get back Activated 
Threads 2 for IFL Core. I'm really interested in the additional information.

Thanks.

Regards,
David

-Ursprüngliche Nachricht-
Von: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] Im Auftrag von Bill 
Bitner
Gesendet: Mittwoch, 28. Oktober 2020 19:05
An: LINUX-390@VM.MARIST.EDU
Betreff: [EXTERN]-Re: IFL usage of Linux servers


Hello David,
An important aspect of this is whether you are running SMT-2 or not. If you 
are, then I recommend you read https://www.vm.ibm.com/perf/tips/smtutil.html 
for some background as when
SMT-2 is on we have to take extra care because in that scenario the word "IFL" 
is ambiguous between whether we're referencing the Core or the two threads in aggregate, 
as with SMT-2 many of the measures, but not all, are of a logical processor (aka thread) 
perspective. If you share whether you're SMT-2 or SMIT-1 or SMT-0 (SMT disabled). I can 
give you some additional information on interpreting the data.

Regards,
Bill
___

Bill Bitner - z/VM Client Focus and Care - 607-429-3286 bitn...@us.ibm.com "Making 
systems practical and profitable for customers through virtualization and its 
exploitation." - z/VM



From:   "Mittelstädt, David" 
To: LINUX-390@VM.MARIST.EDU
Date:   10/28/2020 01:30 PM
Subject:[EXTERNAL] IFL usage of Linux servers
Sent by:Linux on 390 Port 



Hi everyone,

I need a little help understanding the values from the z/VM Performance Toolkit 
and command line tool hyptop. I want to measure the IFL utilization of a z/VM 
guest running linux from a z/VM or hardware perspective, e.g.
linux server A consumes 2 IFL or linux server B consumes 0.5 IFL. We need this 
information for accounting and forecast purposes. So I used the tool hyptop to 
get the information of the used cpu, but I'm not sure how to interpret these 
values correctly. What means the column cpu(%)? Is this the usage of 1 IFL in 
percent? And is this same value like the one in the z/VM Performance Toolkit 
%CPU under 21. User resource usage?

Is it possible to measure the IFL usage with these values? Or do I need other 
values?

Thanks in advance.


Best regards,
David Mittelstädt


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Re: z15 on-board compression

[barton]

We've done some experiments with the onboard compression on our brand 
new z15 and are implementing the compression in our products where it 
makes sense.  We have a CMS pipes stage written to make playing easy, so 
have CMS functionality.  As well as the assembler bits.


We also included the onboard compression in our z/OS Collector running 
on z/OS, sending SMF records over to z/VM.  Very unexpected results.  
Getting about a 90% reduction in data transmission requirements, but 
more amazing, we can measure a drop in overall cpu on z/OS by using the 
compression.  So we are compressing the data on z/os, and by doing so 
are reducing the overall cpu requirements to transmit the SMF records.



On 6/9/2020 4:36 PM, Michael MacIsaac wrote:

Hello list,

I heard about the new DFLTCC instruction on the z15, aka on board
compression.  I tried a quick experiment to see the difference from a z14.
Disclaimer: I am not a performance expert.

Here are three commands to create, compress and decompress a 1G file on a
z14:

# grep Type: /proc/sysinfo
Type: 3906

# time dd if=/dev/zero of=1G.file bs=1G count=1
1+0 records in
1+0 records out
1073741824 bytes (1.1 GB, 1.0 GiB) copied, 21.93 s, 49.0 MB/s

real0m22.047s
user0m0.001s
sys 0m3.669s

# time cat 1G.file | gzip -c > 1G.compressed.file

real0m7.603s
user0m5.362s
sys 0m0.789s

# time cat 1G.compressed.file | gzip -d > 1G.file

real0m24.833s
user0m4.103s
sys 0m1.845s

Here's the same commands on z15:

# grep Type: /proc/sysinfo
Type: 8561

# time dd if=/dev/zero of=1G.file bs=1G count=1
1+0 records in
1+0 records out
1073741824 bytes (1.1 GB, 1.0 GiB) copied, 1.59126 s, 675 MB/s

real0m1.621s
user0m0.000s
sys 0m1.216s

# time cat 1G.file | gzip -c > 1G.compressed.file

real0m5.722s
user0m4.946s
sys 0m0.510s
# time cat 1G.compressed.file | gzip -d > 1G.file

real0m6.150s
user0m3.922s
sys 0m1.290s

Wow more than 10x faster on dd - was not expecting that as I didn't think
it uses compression. But the compress with gzip -c, was only 25% faster on
the z15 while the decompress was about 4x.

Are these results expected?

Thanks.


--
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Re: KVM only supports 4guests

[Barton]

Right.  That’s what I’m hearing , that ‘unlimited ‘ is not available on Z

Barton


> On Oct 22, 2019, at 12:27 AM, Jim Elliott  wrote:
> 
> Sam:
> 
> The Red Hat site above does not make sense to me as there is only ONE
> version of RHEL available for IBM Z. That is, Red Hat Enterprise Linux with
> Unlimited Guests and Red Hat Enterprise Virtualization are NOT available
> for IBM Z.
> 
> Jim Elliott
> Senior Consultant - GlassHouse Systems Inc.
> 
> 
> 
>> On Mon, Oct 21, 2019 at 6:07 PM Cohen, Sam  wrote:
>> 
>> Barton,
>> 
>> It depends on the licensed version of Redhat that you have.  From the
>> footnote:
>> 
>> This guest limit does not apply to Red Hat Enterprise Linux with Unlimited
>> Guests. There is no guest limit for Red Hat Enterprise Virtualization, Red
>> Hat Enterprise Linux OpenStack Platform, and the Red Hat Enterprise Linux
>> with Smart Virtualization bundle.
>> 
>> Thanks,
>> 
>> Sam
>> (217) 862-9227 (office)
>> (602) 327-2134 (cell)
>> 
>> -Original Message-
>> From: Linux on 390 Port  On Behalf Of Barton
>> Sent: Monday, October 21, 2019 2:54 PM
>> To: LINUX-390@VM.MARIST.EDU
>> Subject: KVM only supports 4guests
>> 
>> I’m hearing at gse that red hat on z only supports 4 guests on kvm on z?
>> Here’s a  link, am i missIng something?
>> https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Faccess.redhat.com%2Farticles%2Frhel-kvm-limitsdata=02%7C01%7CSam.Cohen%40LRS.COM%7C48d4b88bb27041ea857c08d75671af04%7C62af9ccc42164ae2a1d306614c59c315%7C0%7C0%7C637072918605890971sdata=g%2FPSoSxYqh2SgqhLX5V5KrvdkgFPSuWcvqrkupgaKj0%3Dreserved=0
>> 
>> Barton
>> 
>> 
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KVM only supports 4guests

[Barton]

I’m hearing at gse that red hat on z only supports 4 guests on kvm on z? 
Here’s a  link, am i missIng something?  
https://access.redhat.com/articles/rhel-kvm-limits

Barton


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Re: Migration from z/VM to KVM

[barton]

Velocity Software offers to universities at no charge our complete zPRO, 
allowing the universities to run their z/VM system without any knowledge 
of z/VM.  It is a complete web based interface that creates an on-prem 
cloud,  We will install it and support it.  Takes 1/2 day to get it all 
build.  (No smapi, no java, no complexity).  The university will have 
complete control of their resource and never have to look at a 
directory, dirmaint, or a 3270.  And they get a platform that scales 
(z/VM).  Isn't that a better alternative?


Anyone that wants to check out our on-prem cloud can go to 
"zPRO.VelocitySoftware.com".  You can sign up to use our onprem cloud 
and create linux servers, cms users, even 2nd level VM systems.  Userid 
is "demozpro".   password is "demodemo".  And yes, we have racf and feel 
secure in your trying to hack our system.


Anyone who has tried xcat, cma or others and failed (like us, and 
several customers), this actually works, is installable, and usable  
Show your management!



On 8/28/2019 8:28 AM, Jim Elliott wrote:

I have a customer considering a migration from z/VM to KVM (ClefOS) on
their LinuxONE machines. They are a university with no Z skills (we provide
those) so they are looking at simplifying their environment as they grow.
Is there documentation / tips anywhere on how to do such a migration?

Jim Elliott
Senior Consultant - GlassHouse Systems Inc.

<


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Looking at IBM Secure Container?

[barton]

First, I happened to see an article on LinkedIn quoting Krebs on 
Security.  The Capital One hack of 106 million pieces of personal 
information seems to have been on AWS? And an Engineer from AWS was the 
hacker?  The data was "improperly secured".  Why would companies put 
personal data somewhere that other people really do have access, and it 
is really not as secure as you hope. And the Starwood hack, I was on 
some bulletin board and the Starwood engineers were so proud they got 
off the mainframe (just to make world news on getting hacked badly).  
Aren't they proud now (and now their data is back on a mainframe oh darn)


I'm thinking that if this data was secure in an IBM Secure Container, 
this would not have happened.  (Or probably on any reasonably secure 
mainframe).  So I'm starting to understand more the need for all the 
encryption and security that IBM Z is providing.


If you are considering the IBM Secure Container architecture, Velocity 
Software has worked with the IBM team in coming up with a solution for 
managing performance.  I saw many presentations on the subject, and 
asked to blank stares why would customers utilize a black box for 
anything  - if there is a problem, it can not be diagnosed.  Great idea, 
but did not include any mechanism for managing performance or diagnosing 
problems  A solution for managing IBM Secure container can be found 
at http://velocitysoftware.com/collectd.html


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MongoDB on Linux on System Z

[barton]

For those of you implementing MongoDB, or thinking about it, zVPS has 
added support for it: http://velocitysoftware.com/mongodb.html


For those of you going to SHARE next week, you should be interested in 
Kurt Acker's presentation presenting his MongoDB project and management 
solutions utilized.  Tuesday at 3:30.  See you there.


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Re: Idea: Using SCRT to report on Linux usage; maybe a way to reduce the entry level cost for Linux on Z?

[barton]

Isn't the ibm tool just for z/os and at the LPAR level?  nothing to do
with what goes on inside z/vm.  nothing to do with what goes on inside
linux for specific licensing.

I've been asked to provide such information by another vendor, and that
function will be released shortly.  This allows the 4 hour rolling
average for linux servers (x or z), pools of linux servers, groups of
linux servers, and can be done for applications inside linux as well.
It can also be used for VSE if anyone cares.   So I've led the horse to
water.


On 4/12/2018 6:55 PM, Timothy Sipples wrote:

IBM already has a sub-capacity accounting tool for Linux on Z and LinuxONE:
the IBM License Metric Tool (ILMT). ILMT is already facilitating
sub-capacity licensing of IBM software products on Linux on Z and LinuxONE.
Details here:

https://www.ibm.com/developerworks/community/wikis/home?lang=en#!/wiki/IBM%20License%20Metric%20Tool

ILMT is also available for (and common on) Windows, AIX, Linux on X86, etc.
And it's a no charge, supported tool.

I don't know if IMLT allows non-IBM software accounting, but that seems
like a great idea to me if it's not already available. Try here if you
want/need to lodge a Request for Enhancement (RFE):

https://www.ibm.com/developerworks/rfe/?BRAND_ID=301

Be sure to look for preexisting ILMT RFEs that might be similar before
opening a new one.

IBM also already has sub-capacity licensing for z/VM, also via ILMT.
Details here:

https://www.ibm.com/common/ssi/rep_ca/7/897/ENUS217-267/ENUS217-267.PDF


Timothy Sipples
IT Architect Executive, Industry Solutions, IBM Z & LinuxONE,
Multi-Geography
E-Mail: sipp...@sg.ibm.com

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Re: Guest show steal and the LPAR has available CPU

[barton]

The "steal" you are showing here is at the LPAR level where workload is
running on an LPAR logical engine, but that engine is also being
utilized by the other LPAR, so one of them must wait (measured as
"steal").  This is to be expected at high utilization.  I prefer to look
at the summary that looks something like the following, showing your 10
engines and how they are utilized.  The two Linux/IFL LPARs are running
for a total above 90% of available resource.  When running above 90%,
there is just going to be a lot of CPU waits (shown on ESAXACT as Bill
said), and "steals" as measured by linux and the LPAR.  This is only a
problem if your backups are not completing on time, otherwise, it is
just telling you that work would complete faster if there was more
resource available (more IFLs).  Alternatively, reduce the weight for
VML4, and that will give more resource to VML2.

Totals by Processor type:
<-CPU---> <-Shared Processor busy->
Type Count Ded shared  Total  Logical Ovhd Mgmt
 - --- -- --   
CP   2   0  2  193.3184.5  2.4  6.4
IFL  4   0  4  394.3393.2  0.4  0.7
ICF  3   3  00.500  0.5
ZIIP 1   0  18.5  7.9  0.1  0.5






On 2/1/2018 11:58 AM, Victor Echavarry wrote:

Barton:

This is the report of  the CPU at the moment of the steal, VML2 is production 
and VML4 is test.

ESALPAR - Logical Partition Analysis - VML2
  <--Complex--> <---Logical>  <-- Logical Processor --> 
<CPU (percentages)---> 
  Phys Dispatch <--Partition---> <-CPU--> CPU <%Assigned>   Cap  Wt 
Total  Emul  User   Sys  Idle  Stl  Idle  cp1/cp2
Time CPUsSlice Nr Name Type Cnt Type  ID  Total Ovhd  Wght ped Cmp  
util  time ovrhd ovrhd  time  Pct  Time
   --   ---  --- --  - --- --- 
- - - - -  -- --- ---
20:21:00   10  Dynamic 01 VML2 IFL4 CPU  Tot  253.3  0.275  No  No 
252.7 238.5   8.8   5.3147
20:21:00   10  Dynamic 03 VML4 IFL3 CPU  Tot  121.6  1.260 Yes  No
20:20:00   10  Dynamic 01 VML2 IFL4 CPU  Tot  255.0  0.275  No  No 
254.5 240.7   8.4   5.4146
20:20:00   10  Dynamic 03 VML4 IFL3 CPU  Tot  119.7  1.160 Yes  No
20:19:00   10  Dynamic 01 VML2 IFL4 CPU  Tot  250.3  0.375  No  No 
249.8 235.9   8.5   5.4150
20:19:00   10  Dynamic 03 VML4 IFL3 CPU  Tot  125.2  1.660 Yes  No
20:18:00   10  Dynamic 01 VML2 IFL4 CPU  Tot  257.1  0.275  No  No 
256.5 242.2   8.8   5.6144
20:18:00   10  Dynamic 03 VML4 IFL3 CPU  Tot  114.6  1.260 Yes  No

The majority of the steal issues occurs at night. At that time backups process 
starts.

Regards,

Victor Echavarry
System Programmer
Operating Systems
EVERTEC, LLC



-Original Message-
From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of barton
Sent: Thursday, February 1, 2018 3:24 PM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: Guest show steal and the LPAR has available CPU

It's very important to look at it first from the total IFL perspective.
What is the total IFL utilization?  Then break that down by LPAR.
If 100% of your IFLs are in use, and one LPAR is using 60% of the IFL resource 
and the other LPAR is using 40% of the IFL resource, then it's a matter of 
prioritizing the workload.  Relative share of 100 means there is no 
prioritization assigned.
If the guests need more CPU, then they need a larger share.  If the LPAR needs 
more CPU, it needs a larger weight...

On 2/1/2018 9:47 AM, Victor Echavarry wrote:

We have a situation that a couple of guest has CPU stealing and when we 
checking the LPAR, the IFL have available CPU for processing. What could be 
possible? The guest sharing are based on CPU assigned, for example a guest with 
1 CPU has 100 relative share and a 2 CPU has 200 relative share. We are running 
under z/VM 6.4 and the SLES is 11SP4.

Regards,

Victor Echavarry

System Programmer

Operating Systems

EVERTEC, LLC








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Re: Guest show steal and the LPAR has available CPU

[barton]

It's very important to look at it first from the total IFL perspective.
What is the total IFL utilization?  Then break that down by LPAR.
If 100% of your IFLs are in use, and one LPAR is using 60% of the IFL
resource and the other LPAR is using 40% of the IFL resource, then it's
a matter of prioritizing the workload.  Relative share of 100 means
there is no prioritization assigned.
If the guests need more CPU, then they need a larger share.  If the LPAR
needs more CPU, it needs a larger weight...

On 2/1/2018 9:47 AM, Victor Echavarry wrote:

We have a situation that a couple of guest has CPU stealing and when we 
checking the LPAR, the IFL have available CPU for processing. What could be 
possible? The guest sharing are based on CPU assigned, for example a guest with 
1 CPU has 100 relative share and a 2 CPU has 200 relative share. We are running 
under z/VM 6.4 and the SLES is 11SP4.

Regards,

Victor Echavarry

System Programmer

Operating Systems

EVERTEC, LLC








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Re: How many Intel cores does an IFL emulate

[Barton]

Yes.  Gigahertz is gigahertz.  If you can measure ghz consumed on x, you can 
guestimate requirements on z.   The only way to understand requirements is to 
know current use.  

Barton


> On Nov 7, 2017, at 8:28 PM, Victor Echavarry Diaz <vechava...@evertecinc.com> 
> wrote:
> 
> We receive a request from a new customer for a z/Linux guest on a BC12. The 
> specification that the vendor supplied is for an intel platform. Does anyone 
> know is there a formula to convert intel cpu cores to IFL?
> 
> Regards,
> 
> Victor Echavarry
> 
> System Programmer
> 
> Operating Systems
> 
> EVERTEC, LLC
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> WARNING: This email and any files transmitted with it are confidential and
> intended solely for the use of the individual or entity to whom they are
> addressed. If you have received this email in error please delete it 
> immediately.
> Please note that any views or opinions presented in this email are solely 
> those
> of the author and do not necessarily represent those of EVERTEC, Inc. or its
> affiliates. Finally, the integrity and security of this message cannot be
> guaranteed on the Internet, and as such EVERTEC, Inc. and its affiliates 
> accept
> no liability for any damage caused by any virus transmitted by this email.
> 
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Re: Diagnose high wait

[Barton Robinson]

On our website,
"http://velocitysoftware.com/present/flowchrt.html; , there is a
performance analysis flow chart.  When there is wait, it is MOST often
not related to the linux server, it is MOST likely to be related to
resource constraints that the server just happens to be using (cpu,
storage/ram, paging, sometimes I/O...).
There is also a performance class
"http://velocitysoftware.com/seminar/workshop.html; june 19th in
Columbus just prior to the VM Workshop.  Or in the UK Nov 6th prior to
the UK GSE.


On 4/24/2017 1:34 AM, Christer Solskogen wrote:

While we're at talking about high steal% , could somebody share some
insights about how to diagnose high wait%?

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Re: Top User show high cpu steal

[Barton]

He needs to know how to upload

Barton


> On Jan 22, 2017, at 2:10 AM, Tim Kessler <t...@velocitysoftware.com> wrote:
> 
> Victor,
> Upload an hour of data from zwrite 191 from when the problem occurred
> 
> -Original Message-
> From: Victor Echavarry Diaz <vechava...@evertecinc.com>
> To: LINUX-390@VM.MARIST.EDU
> Sent: Sat, 21 Jan 2017 9:15 AM
> Subject: [LINUX-390] Top User show high cpu steal
> 
> I receive incidents from the unix group of high cpu % steal on a server . 
> When I check on the VM side this show this is a Top User also. Is this 
> normal? Why this is should happen? The IFL's are less than 50%.
> 
> Regards,
> 
> Victor Echavarry
> System Programmer
> EVERTEC, LLC
> 
> 
> WARNING: This email and any files transmitted with it are confidential and
> intended solely for the use of the individual or entity to whom they are
> addressed. If you have received this email in error please delete it 
> immediately.
> Please note that any views or opinions presented in this email are solely 
> those
> of the author and do not necessarily represent those of EVERTEC, Inc. or its
> affiliates. Finally, the integrity and security of this message cannot be
> guaranteed on the Internet, and as such EVERTEC, Inc. and its affiliates 
> accept
> no liability for any damage caused by any virus transmitted by this email.
> 
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Re: CPU Steal on Linux Guest

[Barton Robinson]

Victor, it is the accumulation of ALL the IFL utilization and the LPAR
weights.  The other LPAR is able to use any of the 4 IFLs, but only 3 at
a time.  If total IFL utilization is close to 400%, then to give more
CPU to one linux server means higher weight for the LPAR, and higher
share for the linux server.


On 12/20/2016 9:34 AM, Victor Echavarry Diaz wrote:

Barton:

The other LPAR has 3 active IFL's. The fourth is offline.

Regards,

Victor Echavarry
System Programmer
Operating Systems


-Original Message-
From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of Barton 
Robinson
Sent: Monday, December 19, 2016 7:53 PM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: CPU Steal on Linux Guest


How much of your IFLs are in use by the other LPAR(s)?

On 12/19/2016 2:19 PM, Victor Echavarry Diaz wrote:

Can someone explain why CPU steal is? We believe that when the VM LPAR is using 
almost all is IFL's CPU stealing begins between guests. But today this specific 
 LPAR has 4 IFL and is using 350% and one of the server, that has a one the 
highest share is having a steal of 70%.

Regards,

Victor Echavarry

System Programmer

Operating Systems











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EVERTEC, Inc. or its affiliates. Finally, the integrity and security
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Re: CPU Steal on Linux Guest

[Barton Robinson]

How much of your IFLs are in use by the other LPAR(s)?

On 12/19/2016 2:19 PM, Victor Echavarry Diaz wrote:

Can someone explain why CPU steal is? We believe that when the VM LPAR is using 
almost all is IFL's CPU stealing begins between guests. But today this specific 
 LPAR has 4 IFL and is using 350% and one of the server, that has a one the 
highest share is having a steal of 70%.

Regards,

Victor Echavarry

System Programmer

Operating Systems











WARNING: This email and any files transmitted with it are confidential and
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addressed. If you have received this email in error please delete it 
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Please note that any views or opinions presented in this email are solely those
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affiliates. Finally, the integrity and security of this message cannot be
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Re: Additional SWAP recommendations

[Barton Robinson]

Yah, I've yet to see any data justifying wasting disk (except to get a
lunch from your disk vendor) for swap space instead of just moving the
extra disks to be part of the paging subsystem.  If anybody has any data
that they think justifies this position, please send it.
VDISK gets paged out to disk in the paging subsystem when idle.  So same
result as you suggest, but a much less expensive solution.


On 11/29/2016 3:10 PM, Mark Post wrote:

On 11/21/2016 at 09:35 AM, "Beesley, Paul"  wrote:

Hi

A couple of our z/Linux servers running under z/VM are apparently short on
swap space and I*ve been asked to increase it.
The PROFILE EXEC has 2 SWAPGEN statements to define 2 x 768MB swap VDisks.

I was planning on using defining additional Vdisk as follows:
Def vfb-512 * allocate 1GB

As others have mentioned, you may or may not want to do this.  For me, adding 
another 1GB of VDISK to several guests is probably not a good thing.  If, as 
Willemina mentioned, you're not seeing _active_ paging _rates_, I would 
allocate real DASD instead.  If it's going to get written out and then not 
referenced again for a very long time, you don't need it to be in virtual 
storage in z/VM.  If you are seeing active paging rates, then you would be 
better off adding memory to the guests and let z/VM do the paging.


Mark Post

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Re: Open stack on RHEL

[Barton Robinson]

For those interested.  We have a project to replace xcat/smapi with a
full backend for openstack on z/vm as part of our zpro offering. The
objective is for a user of openstack to have control over a z/vm service
the same as their vmware service.
Since our API already includes any or none of VMSecure, RACF, dirmaint,
and specifically eliminates the need for SMAPI, I'm hoping our solution
will simplify your environment immensely.

On 3/25/2016 8:40 AM, Davis, Larry (National VM Capability) wrote:

CA has been looking for people to give them the API's they are looking for, but 
IBM is not sharing all there interfaces either

Larry Davis,
VM Capability

-Original Message-
From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of Dave Jones
Sent: Tuesday, March 22, 2016 12:03 PM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: Open stack on RHEL

Yes, xCAT only works "out of the box" with DIRMAINT/SMAPI/RACF.other 3rd 
party products would probably have to be configured a bit.

DJ

On 03/22/2016 10:42 AM, Agblad Tore wrote:

Yes, we installed xCAT.
But got problem due to we have VMSecure and CA have not implemented
all API:s And there we are now, not usable yet at least.
/Tore


Tore Agblad
zOpen, IT Services

Volvo Group Headquarters
Corporate Process & IT
SE-405 08, Gothenburg  Sweden
E-mail: tore.agb...@volvo.com
http://www.volvo.com/volvoit/global/en-gb/


-Original Message-
From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of
Dave Jones
Sent: den 22 mars 2016 4:37
To: LINUX-390@VM.MARIST.EDU
Subject: Re: Open stack on RHEL

Tore, has your group looked into the xCAT/OpenStack support that now
comes with z/VM 6.3? Or did you just roll your own there?

Have a good one.

DJ

On 03/22/2016 10:32 AM, Agblad Tore wrote:

OpenStack is lots of stuff.
And a big difference just as Mark says, in some parts.
Otherwise you can make it work.
We have a beta version implementing openStack API (only some yet) communicating 
via SMSG.
For this you need only one Linux server per SSI.
And no, there is no offering from RedHat, we had to code that part (API via 
SMSG) ourselves.
But dashboard for example and most other components is possible to download and 
setup.

/Tore



Tore Agblad
zOpen, IT Services

Volvo Group Headquarters
Corporate Process & IT
SE-405 08, Gothenburg  Sweden
E-mail: tore.agb...@volvo.com
http://www.volvo.com/volvoit/global/en-gb/


-Original Message-
From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of
Mark Post
Sent: den 19 mars 2016 11:44
To: LINUX-390@VM.MARIST.EDU
Subject: Re: Open stack on RHEL


On 3/19/2016 at 09:34 AM, Jake Anderson  wrote:

Hi

Is there any difference running a openstack  in Linux running on x86
and open stack on zVM ?

As far as the interfaces to the hypervisor(s) go, yes.  Other than that, there 
shouldn't be.  I haven't heard of Red Hat offering their OpenStack product on z 
Systems, however.


Mark Post

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Re: cp3kvmxt / monwrite and storage info

[Barton Robinson]

No, monitor data does NOT contain storage information from other
LPARs.   The CPU information comes from the HMC and is only available to
show CPU consumption by the LPAR - nothing within.



On 1/5/2016 6:28 AM, Grzegorz Powiedziuk wrote:

Hello,
I am trying to capture performance data with cp3kvmxt and I am having
trouble to get anything more than CPU utilization.
The person who imports the EDF file says that his tool can't see storage
configuration for other LPARs and that it should. He can see storage
utilization only for a local z/VM instance.
The CPU utilization and configuration is there for all LPARs though.

Does monwrite data even contain storage information from other LPARs? I
don't remember seeing anywhere in performance monitor toolkit this
information and it uses same mondcss after all. In perfkit all I can see is
CPU stats from other LPARS (menu 8).


Here is what I do.

I have a user id with following directory statements required for using
mondcss:

IUCV *MONITOR MSGLIMIT 255
NAMESAVE MONDCSS

>From the userid id I did enable all necessary monitor domains:

q monitor
MONITOR EVENT ACTIVEBLOCK4 PARTITION8192
MONITOR DCSS NAME - MONDCSS
CONFIGURATION SIZE   68 LIMIT 1 MINUTES
CONFIGURATION AREA IS FREE
USERS CONNECTED TO *MONITOR - PERFSVM
   PERSMAPI
MONITOR   DOMAIN ENABLED
PROCESSOR DOMAIN ENABLED
STORAGE   DOMAIN ENABLED
SCHEDULER DOMAIN DISABLED
SEEKS DOMAIN DISABLED
USER  DOMAIN ENABLED
ALL USERS ENABLED
I/O   DOMAIN ENABLED
PCIF CLASS ENABLED
ALL DEVICES ENABLED
NETWORK   DOMAIN ENABLED
ISFC  DOMAIN ENABLED
APPLDATA  DOMAIN ENABLED
ALL USERS ENABLED
SSI   DOMAIN ENABLED
MONITOR SAMPLE ACTIVE
INTERVAL1 MINUTES
RATE 2.00 SECONDS
MONITOR DCSS NAME - MONDCSS
CONFIGURATION SIZE 4096 LIMIT 1 MINUTES
CONFIGURATION AREA IS FREE
USERS CONNECTED TO *MONITOR - PERFSVM
   PERSMAPI
MONITOR   DOMAIN ENABLED
SYSTEMDOMAIN ENABLED
PROCESSOR DOMAIN ENABLED NOCPUMFC
STORAGE   DOMAIN ENABLED
USER  DOMAIN ENABLED
ALL USERS ENABLED
I/O   DOMAIN ENABLED
PCIF CLASS ENABLED
ALL DEVICES ENABLED
NETWORK   DOMAIN ENABLED
ISFC  DOMAIN ENABLED
APPLDATA  DOMAIN ENABLED
ALL USERS ENABLED
SSI   DOMAIN ENABLED



The mondscss segment size according to my calculations is pretty big:
q nss map
..
0012 MONDCSS  CPDCSS N/A09000  0CFFF
..
0CFF-09000=16383  (decimal) and 16383*4K (+1page) pages gives 64MB if I am
doing the math right.


I run the CP3KVMXT  with mondcss argument  and specify intervals and
timeframes manually (30 minutes intervals for 5 hours total run)

When it is done, it creates a bunch of files like:

D111815  ACTVUSRS A1
D111815  BCUDATA  A1
D111815  DEBUGA1
D111815  EDF  A1
D111815  SAMPSA1

There are no errors.
I've also tried to run monwrite first and use the result file as an input
for cp3kvmxt. Also no luck.

The EDF is the one I send to person with the tool to analyze it.

What am I doing wrong?

Thank you
Gregory

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Re: New Subscriber's first question.

[Barton Robinson]

I believe CMMA was withdrawn, and function completely removed in SLES 11.

On 12/18/2015 10:12 AM, Davis, Jim [PRI-1PP] wrote:

I am a systems programmer at Primerica Life Insurance.
We have been running SLES linux under VM for nine years.
We only have four production VMs on one lpar using a single IFL.

We will be installing a Z13 in Jan 2016 which has required me to upgrade all 
SLES 10.3 VMs to SLES 11.4 and VM from 540 to 630.

The VM lpar has 12GB of storage plus 4GB of xstore.
Under 540 I did not experience any paging to external VM page datasets.
CMMA=ON

When I bring up VM 630, I see massive movement of pages to xstore and then page 
outs to aux storage, filling up aux storage.
I have  increase aux storage to 3x but it keeps growing.

It acts like CMMA is not functioning under VM 630.

Any assistance would be greatly appreciated.

Jim Davis




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Re: Status of VDISK after swap space usage

[Barton Robinson]

Has something changed in last 5 years?  This has been in my standard
SHARE presentations for the last 5 years, with CMM drop 20,000 pages,
and there are 20,000 page reads.  Drop another 20,000 pages, and there
are 40,000 page reads (and 20,000 page writes becuase it was a
constrained storage experiment).  End result was 40,000 less pages on
disk space and a LOT of page reads.  Too bad no one from Endicott sees
my presentations.

On 12/11/2015 4:33 AM, Bill Holder wrote:

On Thu, 10 Dec 2015 14:05:26 -0800, Barton Robinson wrote:


If anybody in endicott is listening, ONE REQUEST.  The current diagnose
used by the CMM function to release a page actually causes z/VM to read
the page in from the paging subsystem before releasing it.  So release
100,000 pages that are on the paging subsystem means 100,000 page reads
from disk.  VERY BAD.  If you discard a page that is on paging disk,
discard it, don't read it and then discard it.

Sorry, Barton, but this is simply factually incorrect, and would certainly
be APARable if it were so.
We do not read data pages from DASD during any virtual storage release
operation.  However,
it is true that releasing them may require paging I/O reads to read the
PGMBKs which represent
the megabytes containing the released pages.  The ratio of PGMBKs to pages
represented is
8K to 1M (256 pages), but the actual ratio we need to read can be
substantially higher depending
on the distribution - if only one page per megabyte is being released, we
may have to read one
8K PGMBK for each 4K page being released.  If you have evidence that actual
data pages are
being read during any release operation (diag x'10' or otherwise), please
open a PMR and send
in your evidence.

(re-sending with corrected subject, sorry)

- Bill Holder, z/VM Development, IBM

"Much that once was is lost, for none now live who remember it."  -
Galadriel
"He that breaks a thing to find out what it is has left the path of wisdom"
- Gandalf
(JRR Tolkein)

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Re: Status of VDISK after swap space usage

[Barton Robinson]

It couldn't be pgmbk, this was a result of a LINUX CMM command, and it
was the Linux storage assigned to the virtual machine that was targeted.

On 12/11/2015 11:01 AM, Bill Holder wrote:

Barton Robinson wrote:

  Drop another 20,000 pages, and there
are 40,000 page reads (and 20,000 page writes becuase it was a
constrained storage experiment).

Now that is rather interesting - that instance where the number
of reads is exactly twice the number of pages being released
maps rather well to the case I mentioned of an 8K PGMBK
needing to be read in order to release a 4K data page.
So I'm fairly certain the PGMBK reads are part of the issue,
I don't see how pages read could be greater than
pages released otherwise (assuming this was a controlled
experiment with no other factors invovled).  But I'm still
betting on Linux having the links within the pages
themselves, as that would generate the sort of reads
you're reporting.

And some folks here do see your presentations, though I'll
admit I'm usually not one of them - but we are listening.  Just
keep in mind there's little we can do without a PMR or
formal new function request.

- Bill Holder, z/VM Development, IBM

"Much that once was is lost, for none now live who remember it."  -
Galadriel
"He that breaks a thing to find out what it is has left the path of wisdom"
- Gandalf
(JRR Tolkein)

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Re: Status of VDISK after swap space usage

[Barton Robinson]

VERY COOL.  So Linux has the technology, z/VM has the technology, now it
just takes someone to use them.

If anybody in endicott is listening, ONE REQUEST.  The current diagnose
used by the CMM function to release a page actually causes z/VM to read
the page in from the paging subsystem before releasing it.  So release
100,000 pages that are on the paging subsystem means 100,000 page reads
from disk.  VERY BAD.  If you discard a page that is on paging disk,
discard it, don't read it and then discard it.

On 12/10/2015 1:38 PM, Christian Borntraeger wrote:

On 12/10/2015 05:58 AM, Alan Altmark wrote:

On Wednesday, 12/09/2015 at 08:15 GMT, Barton Robinson
<bar...@velocitysoftware.com> wrote:

My request to get this fixed was rejected by ibm several years ago. The
problem is that even though linux doesn't have anything on the vdisk,
z/vm still has to back it.  I asked for a diagnose as we do with real
storage - a way for Linux to tell z/vm the page no longer needs
backing.  So after the swapoff, can you detach the vdisk? That's the
only way with current technology to tell CP to free it up.

The Linux community didn't like the memory state changes we asked for with
CMM, so I don't see why they would assent to the change you describe.  A
disk is just another address space that would need the same information.
And there's no such thing as "I'm done" with swapping.

Newer Linux swap code does a discard (TRIM) on the full swap disk
if you do a swapon or on a bunch of pages if a cluster of that swap
disk becomes free. This depends on the parameters of swapon. This was
probably added to improve SSD handling. So if diag 0x250 would gain a
discard capability, something like that would become possible.

Christian

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Re: Status of VDISK after swap space usage

[Barton Robinson]

My request to get this fixed was rejected by ibm several years ago. The
problem is that even though linux doesn't have anything on the vdisk,
z/vm still has to back it.  I asked for a diagnose as we do with real
storage - a way for Linux to tell z/vm the page no longer needs
backing.  So after the swapoff, can you detach the vdisk? That's the
only way with current technology to tell CP to free it up.

On 12/9/2015 12:05 PM, Mrohs, Ray (JMD) wrote:

Hi,
Our environment consists of SLES 11.4 servers under VM 6.2.

Sometimes we have misbehaving Linux applications that dip heavily into the SWAPGEN 
configured swap space. After things settle down, Linux never lets go of the space until 
we issue a swapoff -a, and swapon -a. Of course I do this after making sure that we have 
sufficient free memory available in that server. The reported swap use then effectively 
returns to zero. But it seems like nobody tells VM because the VDISK being retained in 
memory for that virtual machine, as reported by Velocity, is consistent with the maximum 
swap space that was used, something on the order of 190K pages, and it never decreases 
even though the Linux swap use stays at zero. Does VM ignore this until it hits a memory 
use threshold, or does Linux not clean up well after itself, or maybe we are missing 
something else? We are trying to avoid a "just reboot it" action.

This is our typical swap disk entry in fstab:
/dev/disk/by-path/ccw-0.0.0105  swap swap   
defaults  0 0

Ray Mrohs
Lockheed Martin Corporation
Service Delivery Staff
Infrastructure Operations
ray.mr...@usdoj.gov
202 307-6896

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Re: Help with cpu stealing

[Barton Robinson]

No, please don't do this.  Having weights in the 1000's is what causes
this problem, creates excess share, the looping user takes over.
If you don't understand excess share, keep shares in the 100's, and use
absolute shares where you know exactly what is intended.


On 10/28/2015 7:13 AM, Veencamp, Jonathon D. wrote:

It is a somewhat crude method, but we used SHARE values on the directory entry 
for the guests.

prod hosts would have SHARE weights in the thousands, and dev hosts would have 
SHARE weights in the tens or hundreds.
Non-prod could pull hard as long as we weren't at capacity, but with any CPU contention 
prod would "win" dramatically, and non-prod would be CPU constrained by ZVM.

As I said crude, and that strategy it depends what you have running.

Jon

From:   Victor Echavarry Diaz 
To: LINUX-390@VM.MARIST.EDU
Date:   10/28/2015 09:28 AM
Subject:Help with cpu stealing
Sent by:Linux on 390 Port 



Hi people:

We've had several incidents where one Linux server has high CPU
utilization and impacts other servers from other applications. We were
asked to prevent this from happening again so we are looking for the best
practices to avoid CPU stealing or CPU waits on one Linux server caused by
another.

Regards,

Victor Echavarry
System Programmer, EVERTEC LLC





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Re: Help with cpu stealing

[Barton Robinson]

The best way is to first understand your share settings and avoid excess
share.See Rob's paper on the topic
here "http://www.velocitysoftware.com/relshare.HTML;
Use zalert to detect problems, and have zoperator to give your
operations and applications people early indication.
i believe you are already licensed for these facilities, we provide
assistance on implementation at no charge.

On 10/28/2015 6:26 AM, Victor Echavarry Diaz wrote:

Hi people:

We've had several incidents where one Linux server has high CPU utilization and 
impacts other servers from other applications. We were asked to prevent this 
from happening again so we are looking for the best practices to avoid CPU 
stealing or CPU waits on one Linux server caused by another.

Regards,

Victor Echavarry
System Programmer, EVERTEC LLC




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Please note that any views or opinions presented in this email are solely those
of the author and do not necessarily represent those of EVERTEC, Inc. or its
affiliates. Finally, the integrity and security of this message cannot be
guaranteed on the Internet, and as such EVERTEC, Inc. and its affiliates accept
no liability for any damage caused by any virus transmitted by this email.

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Re: Help with cpu stealing

[Barton Robinson]

Thanks Jon.  The only time this really matters is when you have looping
or otherwise out of control users.  A well behaved system is, just, well
behaved  If i could only get ibm to change their default shares from
large relative shares for things like tcpip to absolute shares, a lot of
this kind of problem would have been greatly reduced decades ago.


On 10/28/2015 10:31 AM, Veencamp, Jonathon D. wrote:

Well I dunno, we ran with ZVM 95-100% CPU far more than I was comfortable with, 
and zlinux prod kept ticking, while non-prod got choked out above 95%.  That 
sure seemed like mission accomplished at the time.  But we had a rather 
standard Java workload across the board, and perhaps more a more complex 
workloads and larger numbers of guests changes things.

That said, I acknowledge your expertise, and value to this forum Barton!

-Original Message-
From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of Barton 
Robinson
Sent: Wednesday, October 28, 2015 11:30 AM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: Help with cpu stealing

No, please don't do this.  Having weights in the 1000's is what causes
this problem, creates excess share, the looping user takes over.
If you don't understand excess share, keep shares in the 100's, and use
absolute shares where you know exactly what is intended.


On 10/28/2015 7:13 AM, Veencamp, Jonathon D. wrote:

It is a somewhat crude method, but we used SHARE values on the directory entry 
for the guests.

prod hosts would have SHARE weights in the thousands, and dev hosts would have 
SHARE weights in the tens or hundreds.
Non-prod could pull hard as long as we weren't at capacity, but with any CPU contention 
prod would "win" dramatically, and non-prod would be CPU constrained by ZVM.

As I said crude, and that strategy it depends what you have running.

Jon

From:   Victor Echavarry Diaz <vechava...@evertecinc.com>
To: LINUX-390@VM.MARIST.EDU
Date:   10/28/2015 09:28 AM
Subject:Help with cpu stealing
Sent by:Linux on 390 Port <LINUX-390@VM.MARIST.EDU>



Hi people:

We've had several incidents where one Linux server has high CPU
utilization and impacts other servers from other applications. We were
asked to prevent this from happening again so we are looking for the best
practices to avoid CPU stealing or CPU waits on one Linux server caused by
another.

Regards,

Victor Echavarry
System Programmer, EVERTEC LLC





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Re: DIRM problem

[Barton Robinson]

This is the reason I have re-invested in a full rewrite of ZPRO to
completely eliminate any need for SMAPI.  Our community objectives
should be to make our systems easier to implement and maintain.
Companies are not investing in the training as in the past, skills are
harder to acquire, and investing in systems where increased skills will
be required in the future is completely the wrong direction.  I've
always found SMAPI to require training and education beyond what most of
the installations out there want to invest. (How many systems
programmers do you know  have an extra week to pull out manuals and
figure all this stuff out???)   SMAPI is there to provide access from
outside world to run z/vm, and I've yet to find anybody using it that
thinks it has anything to do with making a system easier to implement or
maintain.



On 10/5/2015 8:00 AM, Shumate, Scott wrote:

I'm in the process of setting up DIRMAINT AND RACF to work together so we can 
exploit SMAPI.  I'm using redbook The Virtualization Cookbook for IBM z Systems
Volume 1: IBM z/VM 6.3 to configure it.  I'm on section 8.3.  When I run the 
command to add the server, I get the following error.


DVHREQ2288I Your ADD request for LXTEST2 at * has been accepted.
DVHPWU3376E Days can not exceed the current password expire value of 0
DVHPWU3376E for user LXTEST2.
DVHADD3212E Unexpected RC= 3376, from: EXEC DVHSTPWC ADD LXTEST2 CONFIG
DVHREQ2289E Your ADD request for LXTEST2 at * has failed; with RC =
DVHREQ2289E 3212.

What am I missing?  I did comment out PW_INTERVAL_FOR_GEN=   0 0 in my config99 
datadvh file but still get this error.

Thanks
Scott



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Re: zLinux CPU monitoring

[Barton Robinson]

There is a GSE conference for Linux, z/VM and z/VSE in Stuttgart Germany
in 3 weeks.  That same week, there is a performance class that will show
how to get exactly what you want using zVPS
"http://velocitysoftware.com/zvps.html;.  If you care about performance
of Linux under z/VM, you need the z/VM data, the LPAR data, the virtual
machine data, and especially the linux data down to the process level.
zVPS collects, processes and displays all of this data.

The product can be used to analyze our data at
"http://demo.velocitysoftware.com/ZVIEW/zview.cgi;.  click on the "linux
reports", then on "esalnxp" to show all the linux processes active
across our LPAR.  close the menu then for better viewing.


On 9/30/2015 1:45 AM, Mikael Wargh wrote:

Hello,
This is probably an old already well digested topic, but is there any reliable 
way to monitor CPU usage on Linux level?
Linux tools like TOP and SAR seems to show z/VM's cap as a maximum in their 
statistics eg. share is set to 4% per IFL --> 2xIFL is 8%. This is ok from 
providers point of view (us), but when generating graphs and lists to the 
customers they are wondering why they never get 100%. Also hardware changes etc. 
changes the percentage so it would be better not to show it to the end customer to 
avoid unnecessary confusion.

Nmon seemed to show the capacity in a different way, at first it looked like 
that nmon somehow would understand this as graphs showed spikes up to 100%, but 
with further investigation it seems to be somehow screwed up when having 
multiprocessor environment. When stressing one Linux thread nmon shows 
utilization to be near the z/VM's cap, but when having second thread (two 
logical processors defined to this Linux) it jumps to 100%... When having 
uncapped Linux the nmon show CPU consumption as it should: one thread is 50% 
and two 100%.

Is there any simple way to get the information or correctly scale the 
information so that we would get reports to the customer showing in 0-100% 
range? Customers naturally like to optimize their capacity and now it's a bit 
hard as they get some z/VM cap percentages as total usage statistics and they 
don't understand the physical layer beneath. Maybe one way to optimize would 
simply to be by focusing and minimizing the steal percentage shown in TOP or 
SAR, but the CPU statistics would still be uncorrected.

Br,
Mikael Wargh
Tieto Oyj


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linuxvm.org, velocity back online

[Barton Robinson]

bc12 moved successfully and is back up.

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websites down - Linuxvm.org, velocitysoftware

[Barton Robinson]

Due to system upgrade, Velocity Software and other hosted sites will be
down today.  Note these websites all run under z/VM on a BC12, secured
by RACF.  Our growth, current projects,  and many projected future
projects require a move to a larger space.

We are looking at a large number of interesting projects in pursuit of
performance management for a wide range of architectures as well as
developing a complete cloud architecture that simplifies our z/VM and
Linux on z environments.   Creating a cloud environment with complete
performance management, chargeback capabilities, that is VERY EASY to
maintain has started to show benefits - our publicly available MINECRAFT
server runs under linux under z/VM and is managed by an 11 year old.  If
you or your kids would like to try it, send me a note. (when our system
is back online).

I will update the lists when VelocitySoftware.com is back online.

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websites down for bc12 hardware maintenance

[Barton Robinson]

Hardware maintenance means the Velocity Software and LinuxVM.ORG
websites are temporarily down, as are a few of the local user groups
that we host.  back up shortly

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Re: How to find a memory leak?

[Barton Robinson]

finding the cause and setting an alert would certainly help anticipate.
This data is collected each minute automatically, at a cost of less than
.1% of one ifl per server, at process and system level.  There are more
metrics, this is a sample


Report: ESALNXP  LINUX  Velocity Software Corporate ZMAP 4.2.0 02/
Monitor initialized: 02/27/ First record analyzed: 02/27/15 19:00:00

node/ -Process Ident- ---Storage Metrics (MB)--
 Name IDPPID   GRP   Size RSS Peak Swap Data Stk EXEC Lib Lck PTbl
- - - -        --- --- 

02/27/15
19:01:00
oracle0 0 0 7375  980 72120  174  4.9 1839 478   0 8.98
 init 1 1 010  0.80 0.14  0.1 0.6   0   0 0.01
 perl  2140 1  214096  9.00 4.06  0.1 1.4 2.2   0 0.03
 snmpd22809 1 22808   359 34.70 3.50  0.1 0.0  29   0 0.05


and at system level:
Report: ESALNXR  LINUX RAM/Storage Analysis Report
Velocity Sof
Monitor initialized: 02/27/15 at 19:00:00 on 2828 serial 314C7 First
record
---

Node/Memory in megabytes- -Kernel(MB)-
-Buffers(MB
---Cache---Anonymous--- Stack-Slab--
Time Total Free Size Actv Swap Total Actv Inact Size Size SRec Size
Dirty B
 -     -  -    
- -
02/27/15
19:01:00
oracle   994.8 13.7  5500  0.8 115.60 00 38.40
251   0.2
---

19:02:00
oracle   994.8 13.7  5500  0.8 115.60 00 38.30
251   0.0



On 7/9/2015 9:31 AM, Michael MacIsaac wrote:

Barton,

It reports on the /proc/buddyinfo values and anticipates vmcp failing?

On Thu, Jul 9, 2015 at 12:26 PM, Barton Robinson 
bar...@velocitysoftware.com wrote:


And a good performance monitor would already have this reported - down
to the process level.


On 7/9/2015 9:06 AM, Michael MacIsaac wrote:


Let me answer my own question.  Perhaps kludgy, but by adding 'tee' to
sudo, this technique works:

root@lab141:~ # visudo
root@lab141:~ # tail -1 /etc/sudoers
%zoom ALL=NOPASSWD:/usr/bin/tee
root@lab141:~ # su - mike
mike@lab141:~ # free -m
   total   used   free sharedbuffers cached
Mem:   491473 18  0111170
-/+ buffers/cache:190300
Swap:  512  0511
mike@lab141:~ # echo 3 | sudo /usr/bin/tee /proc/sys/vm/drop_caches 
/dev/null
mike@lab141:~ # free -m
   total   used   free sharedbuffers cached
Mem:   491103388  0  1 12
-/+ buffers/cache: 89401
Swap:  512  0511



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Re: How to find a memory leak?

[Barton Robinson]

And a good performance monitor would already have this reported - down
to the process level.

On 7/9/2015 9:06 AM, Michael MacIsaac wrote:

Let me answer my own question.  Perhaps kludgy, but by adding 'tee' to
sudo, this technique works:

root@lab141:~ # visudo
root@lab141:~ # tail -1 /etc/sudoers
%zoom ALL=NOPASSWD:/usr/bin/tee
root@lab141:~ # su - mike
mike@lab141:~ # free -m
  total   used   free sharedbuffers cached
Mem:   491473 18  0111170
-/+ buffers/cache:190300
Swap:  512  0511
mike@lab141:~ # echo 3 | sudo /usr/bin/tee /proc/sys/vm/drop_caches 
/dev/null
mike@lab141:~ # free -m
  total   used   free sharedbuffers cached
Mem:   491103388  0  1 12
-/+ buffers/cache: 89401
Swap:  512  0511



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Re: Where can I locate Apache Web server for zLinux?

[Barton Robinson]

or you could do it from z/vm with ZVWS.  It is very fast, and trivial to
use.

On 3/19/2015 8:40 AM, Vitale, Joseph wrote:

Hello,

I need to install a simple Web Server to server up  1  file.  Internal load 
balancing requirement.

Looked at Apache Web site, found binaries for  Windows and Linux X86.  Nothing 
for s390.

Do I need to download source or is there a pre-compiled  zLinux version 
available  ?

Thanks
Joe

Joseph Vitale
Technology Services Group
Mainframe Operating Systems

Pershing Plaza
95 Christopher Columbus Drive
Floor 14
Jersey City,  N.J.  07302
Work  201-395-1509
Cell917-903-0102


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Re: Retiring

[Barton]

Will miss you Annie, I've another 15 years to go

Barton


 On Feb 26, 2015, at 3:55 PM, Smith, Ann (CTO Service Delivery) 
 ann.sm...@thehartford.com wrote:
 
 Tomorrow is my last day at IBM
 Hit the big 60 and I am retiring
 8 years working in MVS, 22 in VM and 8 with Linux
 I will miss the work and the people I've met along the way
 
 Annie Smith
 
 This communication, including attachments, is for the exclusive use of 
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 information.  If you are not the intended recipient, any use, copying, 
 disclosure, dissemination or distribution is strictly prohibited.  If you are 
 not the intended recipient, please notify the sender immediately by return 
 e-mail, delete this communication and destroy all copies.
 
 
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Re: Anyone has experience on selling zLinux at fixed price?

[Barton Robinson]

I've looked at the amazon and google chargeback models.  One of their 
options is a fixed price until some number of CPU hours is exceeded.  
This allows the 'easy' fixed fee, but also controls the resource 
abuser.  You would have to have tools in place to alert the abuser that 
they have gone beyond their allotted resource consumption.



On 2/23/2015 5:02 AM, James Vincent wrote:

Hello!

There are going to be a lot of ideas on how to do charging all the way from
we don't charge back to we charge by the micro-process.

Fixed-price charging is good for very well contained zLinux servers.  Using
SHARE ABSOLUTE and even CPU POOLING can help with this.  CPU POOLING is
really good if you are thinking of mixing those fixed-resource servers with
high-performance or premium services servers.  There are pros and cons to
fixed price charging.  A pro is it is MUCH easier than any other kind of
charging (other than no-cost!).  A con is that some folks may think they
are being charged too much if they really don't use it that much or that
heavy, and some may not be thrilled being capped when they want to run
something heavy for a short while.

We use a variable rate based on consumption for most of our servers. We
also have lab servers that are contained within SHARE ABS. We have
processes to cap non-premium production servers when they get out of hand
and the entire processor has been running in the high 90's for CPU. We use
zVPS to collect all the data for the processor/LPARs and the zLinux servers
to evaluate what they are up to every minute. Using that data, we are able
to charge-back to the business units based on what they consume by
process/application. There is a small base charge for just having a server,
then the use of resources adds to it. This was all built over the last 10
years and we are still tuning it!

Figuring out what your business will accept for charging is the hard part.
Between the knobs in z/VM and performance monitoring/collecting tools
available, you can make it work the way you need it.



-- *James Vincent*
-- President, SHARE Inc.
-- Calendar: http://tinyurl.com/JSVCalWeek
-- SHARE is an independent volunteer-run information technology association
that provides *education*, professional *networking *and industry
*influence*

On Mon, Feb 23, 2015 at 2:10 AM, Agblad Tore tore.agb...@volvo.com wrote:


This seems to be the biggest hinder for most people to start using Linux
on z.
Anyone having done this ?
There is a number of options to limit cpu and resources, SHARE and setting
max memory for example. Is this helping out here ?

BR /Tore


Tore Agblad
zOpen Teamleader
IT Services

Volvo Group Headquarters
Corporate Process  IT
Assar Gabrielssons väg 9
SE-405 08, Gothenburg  Sweden
E-mail: tore.agb...@volvo.com
http://www.volvo.com/volvoit/global/en-gb/


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Re: Iaas - SCO vs IBM Wave vs xCat vs zPro - ZPRO

[Barton Robinson]

zPRO has been out for about 4 years and was a project started almost 10
years ago.  We had many customers create their own self service
applications using our web technology, it seemed reasonable to take
their ideas and make a common product.

ZPRO V2 is built on ALL native z/VM functionality, meaning, we don't
have any requirement for Linux servers, agents, SMAPI, JAVA and a lot of
other things I find frustrating.  KEEP IT VERY SIMPLE (AND VERY INEXPENSIVE)

With our webserver (ZVWS, formerly ESAWEB) being a native z/VM
webserver, eliminating SMAPI (and anybody who has tried to use SMAPI
knows that is a VERY GOOD thing) was easy.  No java agents mean any
browser works.  Since ZVWS is already installed in a few hundred
installations, most of those already have the full infrastructure
installed - zPRO installation takes about 10 minutes by a junior systems
programmer.  It is NON-INTRUSIVE, meaning that if it is there it works,
if not there, everything functions.  I don't like system hooks or asking
customers to rebuild lpars because of some software product.

Next week, our demo system will be back online again with Version 2.
We've been giving preliminary demonstrations of V2. Most installations
are asking for self service so you will be able to clone a Linux
server, a CMS guest, a 2nd level z/VM server AND logon to it.
Can't provide an external IP address so no SSH in, i can't afford
someone from say Ukraine or North Korea creating a server on my system
and hacking the world.

Watch this space, there is a lot of back ground activity now that will
soon be very visible.

And to answer your final question:  ZPRO can be configured to clone a
server using disk pool A on LPAR1.  Installing WAS is not a mainframe
thing - but having golden images of your target server means you have
consistency and a lot less time diagnosing problems.

Can wave/zPro/xcat be configured and automated to a level where user may
just say give me redhat 7 created on  disk pool A and on  LPAR 1 and
install WAS.


If you would like a demonstration, please do contact me.




On 1/20/2015 11:04 AM, Grzegorz Powiedziuk wrote:

Hello,
I am trying to do some sort of a comparison between these products and more
digging I do  then more I am lost.
There are many presentations out there with big words like cloud,
orchestrate, cut costs bla bla bla  but it is hard get to the bottom
of it.

Correct me if I am wrong but so far it seams that

1. SCO is rather developed for project managers who can just click and
deploy without understanding the platform at all. They can just chose
images, create patterns, add scripts to be executed on top of an image.
Patterns - who provide these? IBM provides these or user have to create
their own (for example installation of WebSphere or Apache server after
deployment).
It does not support SSI and zFCP  (only edevices)

2. IBM Wave seems to be more for system admins who are just tired of 3270
and constant punching virtual kernels. User can do most of z/VM's tasks
from a GUI and it looks awesome. Admin of IBM Wave have to understand Z and
z/VM very well.  But on the other hand, I see that IBM Wave supports users
and groups. You can create a non privileged user and give him access to
only to specific projects.  For example web server. So it kind of looks
like SCO. If that is the case - why bother with SCO, isn't IBM Wave better?
Am I wrong?

3.  zPRO. I wish I could find some demo videos about this one. From my
understanding it is more like an IBM Wave. Designed for system admins not
project managers. Not meant to be IaaS product right?

4. xCAT. Also rather for system admins only right?

When I try to sum it up in my head, it comes out that only SCO is an IaaS
solution (a very limited but still) because only SCO allows someone who
knows nothing about Z to deploy a virtual machine and add some software on
top of it.
And SCO seems to be using xcat for doing actual system work.

Can Wave/zPro/xCat be used as an IaaS ? OR those are completely not meant
to be an IaaS solution.
I guess I should ask:
Can wave/zPro/xcat be configured and automated to a level where user may
just say give me redhat 7 created on  disk pool A and on  LPAR 1 and
install WAS.

Thank you
Gregory

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Re: SLES11 SP3 v SP1

[Barton Robinson]

AMEN

On 11/19/2014 9:38 AM, Mark Post wrote:

On 11/19/2014 at 03:18 AM, Guest, Darren darren.gu...@uk.experian.com

wrote:

Mark, are you suggesting that the Oracle team should have some actual data to
back up their claims? Not just a bloke with a stopwatch and an uneasy
feeling?! ;-) But yes, I have already asked them to raise this with SUSE
support in the hope that they'll get some real data together.

Yeah, it's a hold over from my time in NTS.  I had a number of customers trying 
to tell me they had a performance problem without any data.  When I was working 
at EDS, our manager used to tell us that if there was no problem record open, 
there was no problem.  I adapted that to say that if there was no performance 
data, there was no performance problem.


Mark Post

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Re: Automated performance reporting on Linux on Z

[Barton Robinson]

I just had an installation demonstrate the perfect tool for you.  In 
looking at what alerts should be set for operations, one of their many 
zlinux servers had a swap full condition.  They were able to go back 
thru reports from last 12 months, took less than a minute to identify 
when the swap filled up, and what processes were running in the linux 
server at that time.  This was with a full web interface, all 
automated.  There were daily, weekly, monthly reports created for linux, 
z/vm, network all automatically and easily accessable thru their web 
interface.
If you would like to talk more, or maybe talk to some of the hundreds of 
installations that run this, that can be arranged.




On 11/8/2014 2:36 PM, Mikael Wargh wrote:

Hello,

We have several zLinuxes installed and been happy with the overall 
functionality especially now when we got the new IBM wave tool installed. 
However, Wave didn’t help is with the problem with the Linux level reporting we 
currently have. z/VM performance reporter gives us current overall status, but 
is not very helpful for longer period capacity trending at least from single 
Linux perspective. Our company’s standard Patrol agents show somewhat twisted 
and misleading information about Linux on z especially on CPU point of view and 
this cannot be modified.

So…now I’m trying to find out which Linux tool could be used as a good base for 
this reporting requirement. Nmon seems to be the best candidate so far, haven’t 
tested SAR yet. Currently I get automated nmon reports from one of our zLinux 
servers and they generate nice graphs with nmon_analyzer Excel program. 
However, it’s not very convenient to manually create graphs every day on your 
laptop…especially when we get reports from several servers in the future.

On AIX you can use nmon2rrd which uses rrdtool for conversion. Also there are 
some nmon2web scripts for AIX. For Linux you can get several nmon web page 
generators which are often based on rrdtool and you have also couple of viable 
SAR graph generating options. I have tried to find a good solution for zLinux 
but so far haven’t been able to fill this automated web page generation gap.

To sum this up:
- We need a performance reporting tool which can be fully automated via Linux 
scripting or similar for multiple zLinux instances. As there seems to be 
several freeware possibilities, we would prefer them.
- Currently I have created a routine which creates daily and weekly nmon 
scripts which are then collected to central zLinux reporting server.
- Those nmon files are useful to our maintenance people, but we need also 
simple graphs to other parties preferably in some picture/html format.
- Ideal solution would be some simple way to convert those nmon files to html 
pages automatically as nmon2rrd does.
- One possibility would be to upload those nmon files to some AIX/x64 server 
and do the conversion there, but it would create extra data transfer and to be 
honest would be quite embarrassing from zLinux point of view.
- Is there any alternative routes to do this or should I try to compile some of 
these AIX/x64 tools to system z Linux?
- We use Redhat 6.4 and z/VM 6.3

Best regards,
Mikael Wargh


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Re: Automated performance reporting on Linux on Z

[Barton Robinson]

The problem with these tools is other than the pretty charts, do they 
help solve the problems?  That ability to solve problems comes with 
experience - difficult to write tools to solve problems if having no 
experience with those problems.  Installations that run Linux on 'Z' 
have greater requirements than distributed servers - running at higher 
utilization, expected for Z, requires complete data, trend data, 
automatic data capture.  The platform has been around for near 15 years 
- with lots of experience available.  Can you go back months with a tool 
and see when the problem started, and what caused it?  Or do you just 
reboot?


On 11/9/2014 1:38 PM, Tito Garrido wrote:

If you are going to try SAR take a look on KSAR project...
http://sourceforge.net/projects/ksar/

Regards,

Tito

On Sun, Nov 9, 2014 at 1:30 PM, Barton Robinson bar...@velocitysoftware.com

wrote:
I just had an installation demonstrate the perfect tool for you.  In
looking at what alerts should be set for operations, one of their many
zlinux servers had a swap full condition.  They were able to go back thru
reports from last 12 months, took less than a minute to identify when the
swap filled up, and what processes were running in the linux server at that
time.  This was with a full web interface, all automated.  There were
daily, weekly, monthly reports created for linux, z/vm, network all
automatically and easily accessable thru their web interface.
If you would like to talk more, or maybe talk to some of the hundreds of
installations that run this, that can be arranged.



On 11/8/2014 2:36 PM, Mikael Wargh wrote:


Hello,

We have several zLinuxes installed and been happy with the overall
functionality especially now when we got the new IBM wave tool installed.
However, Wave didn’t help is with the problem with the Linux level
reporting we currently have. z/VM performance reporter gives us current
overall status, but is not very helpful for longer period capacity trending
at least from single Linux perspective. Our company’s standard Patrol
agents show somewhat twisted and misleading information about Linux on z
especially on CPU point of view and this cannot be modified.

So…now I’m trying to find out which Linux tool could be used as a good
base for this reporting requirement. Nmon seems to be the best candidate so
far, haven’t tested SAR yet. Currently I get automated nmon reports from
one of our zLinux servers and they generate nice graphs with nmon_analyzer
Excel program. However, it’s not very convenient to manually create graphs
every day on your laptop…especially when we get reports from several
servers in the future.

On AIX you can use nmon2rrd which uses rrdtool for conversion. Also there
are some nmon2web scripts for AIX. For Linux you can get several nmon web
page generators which are often based on rrdtool and you have also couple
of viable SAR graph generating options. I have tried to find a good
solution for zLinux but so far haven’t been able to fill this automated web
page generation gap.

To sum this up:
- We need a performance reporting tool which can be fully automated via
Linux scripting or similar for multiple zLinux instances. As there seems to
be several freeware possibilities, we would prefer them.
- Currently I have created a routine which creates daily and weekly nmon
scripts which are then collected to central zLinux reporting server.
- Those nmon files are useful to our maintenance people, but we need also
simple graphs to other parties preferably in some picture/html format.
- Ideal solution would be some simple way to convert those nmon files to
html pages automatically as nmon2rrd does.
- One possibility would be to upload those nmon files to some AIX/x64
server and do the conversion there, but it would create extra data transfer
and to be honest would be quite embarrassing from zLinux point of view.
- Is there any alternative routes to do this or should I try to compile
some of these AIX/x64 tools to system z Linux?
- We use Redhat 6.4 and z/VM 6.3

Best regards,
Mikael Wargh


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Re: Performance Toolkit and zLinux

[Barton Robinson]

Our software (zVPS) is not free, but is no charge for POC.  Our mission
is to help you succeed with the Linux on z POC.



On 8/25/2014 7:46 PM, Martin, Terry Contractor wrote:

I am in the same boat. I would like to use Velocity for my client but since is 
a POC they want to sick with something that is already there like PTK. However 
I am concerned when the time comes to monitor the z/Linux part of this PTK will 
not do the trick without some other piece of software to collect the Linux 
stuff. Not my first choice but I don't have much of a choice at this time.

Terry Martin - Consultant
Cell - 443 854-2452


-Original Message-
From: Linux on 390 Port [mailto:LINUX-390@vm.marist.edu] On Behalf Of 
bernardhines
Sent: Monday, August 25, 2014 9:22 PM
To: LINUX-390@vm.marist.edu
Subject: Re: Performance Toolkit and zLinux

Tom see if there is anything out here for you?
http://www-03.ibm.com/systems/z/os/zos/features/rmf/tools/rmftools.html

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Should you receive this message unintentionally, please do not use the contents 
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  I refuse to tiptoe through life... just to arrive unscathed at Death's door!

   Bernard Hines



-Original Message-
From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of Tom Huegel
Sent: Monday, August 25, 2014 2:28 PM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: Performance Toolkit and zLinux


I want something free..


On Mon, Aug 25, 2014 at 1:44 PM, Rich Smrcina r...@velocitysoftware.com
wrote:


zVPS.


On 08/25/2014 03:39 PM, Tom Huegel wrote:


IBM used to have the RMF module to download for zLINUX so it could be
monitored via Performance Toolkit. Currently z/VM 6.3 SUSE11 that
module no longer available. Is there a replacement?, What is it?

Thanks

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Re: Performance Toolkit and zLinux

[Barton Robinson]

The RMFPMS was a brilliant but misguided piece of software that the
author stopped supporting about 10 years ago.  If it costs several IFLs
to run free software, there's a lot of misguidance going around
The best thing about some of these tools is that your management can't
tell what their real costs is without zVPS.


On 8/25/2014 6:22 PM, bernardhines wrote:

Tom see if there is anything out here for you?
http://www-03.ibm.com/systems/z/os/zos/features/rmf/tools/rmftools.html

The information contained in this message may be confidential and is
intended to be exclusively for the addressee.
Should you receive this message unintentionally, please do not use the
contents herein and notify the sender immediately by return e-mail.

  I refuse to tiptoe through life... just to arrive unscathed at Death's
door!

   Bernard Hines



-Original Message-
From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of Tom
Huegel
Sent: Monday, August 25, 2014 2:28 PM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: Performance Toolkit and zLinux


I want something free..


On Mon, Aug 25, 2014 at 1:44 PM, Rich Smrcina r...@velocitysoftware.com
wrote:


zVPS.


On 08/25/2014 03:39 PM, Tom Huegel wrote:


IBM used to have the RMF module to download for zLINUX so it could be
monitored via Performance Toolkit. Currently z/VM 6.3 SUSE11 that
module no longer available. Is there a replacement?, What is it?

Thanks

-
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Velocity Software Inc.
Main: (650) 964-8867
Main: (877) 964-8867
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z/VM and Linux Performance Workshop - cross posted

[Barton Robinson]

Dear all,

we are offering our famous performance class for the VM-Workshop
attendees, on 24  25 June, in North Carolina.
For registration and more details please visit:
http://velocitysoftware.com/seminar/workshop.html

Please reach out with any questions.
Best wishes and see you in North Carolina!

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Re: zLinux replacement for PROP

[Barton Robinson]

zOPERATOR, a no charge feature of zVPS (from Velocity Software) can
accept and record and respond to messages.


On 3/13/2014 9:13 PM, Morris, Kevin J. (RET-DAY) wrote:

I would like to send all operator messages to a zLinux guest for further 
processing/storage, essentially replacing PROP.  Is this possible with SMSGIUCV or any 
other existing utilities in the zLinux space?  Any thoughts or help on the best method to 
accomplish this task would be greatly appreciated!

Thanks!

Kevin Morris
Reed Elsevier - Technology Services
zOS Systems Engineering




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VM SET REORDER OFF for large hosts

[Barton Robinson]

How do you define large?  Yes, for guests greater than 4gb, you can
measure bad things when reorder occurs. For 30GB guests, really bad
things occur.  But reorder prior to 6.3 is important, or you have to buy
a lot more real storage and real storage is expensive. The storage
algorithm in 6.3 is something I like, BUT the paging in 6.3 is going to
have some interesting challenges that seem designed to sell solid state
paging devices.
So turn reorder off for large guests or you will have spiky response
times, the larger the guest, the longer the spikes.

On 1/15/2014 12:29 PM, Veencamp, Jonathon D. wrote:

I don't mean to hijack Ted's thread on the swap differences he's seeing between 
SLES 11 SP2 and SP3.  I have a different issue, and his issue is more immediate.

I'll make a different thread on my issues.  I'd like to get some feedback on VM 
SET REORDER OFF for large hosts...

Jon
-Original Message-
From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of Barton 
Robinson
Sent: Wednesday, January 15, 2014 2:23 PM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: Swap behavior change between SLES 11SP2 and 11SP3?

With all of the installations (100s) i've worked with using vdisk for
swap, this would be the first complaint i've heard with the exception of
some bad configuration defaults.  If you had really good performance
management tools, I'd be happy to look at the data.


On 1/15/2014 5:44 AM, Veencamp, Jonathon D. wrote:

Ted,

I can't speak to the differences between kernels, but also I am very interested 
in your thread.  Our SLES10 and SLES 11 experience has been that even with 
VDISK as swap on a VM system that is NOT overcommitted on memory, that any 
linux swapping is just kills us with the same sort of results you describe in 
your 1GB vs. 3GB test.  Which is a shame, ZVM VDISK should give us more 
flexibility than it seems to.

So I will hope someone else chimes in with some VM wisdom I don't know.

Jon Veencamp




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Re: Swap behavior change between SLES 11SP2 and 11SP3?

[Barton Robinson]

With all of the installations (100s) i've worked with using vdisk for
swap, this would be the first complaint i've heard with the exception of
some bad configuration defaults.  If you had really good performance
management tools, I'd be happy to look at the data.


On 1/15/2014 5:44 AM, Veencamp, Jonathon D. wrote:

Ted,

I can't speak to the differences between kernels, but also I am very interested 
in your thread.  Our SLES10 and SLES 11 experience has been that even with 
VDISK as swap on a VM system that is NOT overcommitted on memory, that any 
linux swapping is just kills us with the same sort of results you describe in 
your 1GB vs. 3GB test.  Which is a shame, ZVM VDISK should give us more 
flexibility than it seems to.

So I will hope someone else chimes in with some VM wisdom I don't know.

Jon Veencamp




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Re: High cpu utilization on vm/linux LPAR

[Barton Robinson]

This could be just new year workload.  Or someone is running some new
scripts that are consuming LARGE amounts of CPU.  The data shows nothing
strange in the CPU distribution between servers:

Report: ESAUSP2
 ---CPU time--
UserID   (Percent) T:V
/Class   Total  Virt Rat
 - - ---
01/08/14
10:01:00 192.0 183.7 1.0
 ***Top User Analysis***
L220P26.25 25.80 1.0
L216P24.94 22.64 1.1
L20DP24.10 23.61 1.0
L217P23.21 20.79 1.1
L209T21.59 21.43 1.0
L218P18.50 18.34 1.0
L20CT18.03 17.06 1.1
L20BP 7.76  7.62 1.0
L210P 6.89  6.58 1.0
L214P 4.79  4.53 1.1

And from a linux perspective,  looking at the cpu by application, oracle
is consuming quite a bit  - but it really looks like someone is running
short perl  scripts continuously that are consuming large amounts of
data.  (*PROD is the group of linux servers making up production, so
this is across all servers) .  The init bucket is a catchall for short
term (less than 1 minute) processes who's parent process is init.  Thus
the high children use in INIT for production.

Report: ESALNXA  LINUX HOST Application Report
Monitor initialized: 01/08/14 at 10:00:00 on 2827 ser
-
Node/Process/ID---Processor Percent---
Date Application ProcessChildren
Time name  Total sys  user syst usrt
 --- - -    
*Prod*Totals*0 132.0 37.9 66.9 14.6 12.6
 init0  19.9  0.10 11.3  8.5
 kernel  0   5.0  5.0000
 multipat0   2.0  1.4  0.600
 oracle  0  79.1 19.0 59.9  0.20
 perl0   8.8  0.8  2.5  1.8  3.7
 snmpd   0   6.4  4.7  1.700
 tnslsnr 0   8.0  6.3  0.7  1.0  0.1
*Dev *Totals*0  39.5 11.9 26.9  0.3  0.5
 init0   0.700  0.2  0.4
 kernel  0   0.5  0.5000
 oracle  0  36.6 10.1 26.400
 perl0   0.2  0.1  0.0  0.1  0.0
 snmpd   0   1.1  0.8  0.300
 sshd0   0.2  0.1  0.100
*Util*Totals*0   0.4  0.2  0.1  0.1  0.1
 db2fmcd 0   0.3  0.00  0.1  0.1
 snmpd   0   0.2  0.1  0.100

On 1/10/2014 8:00 AM, Victor Echavarry Diaz wrote:

 From a couple of days one of our Linux LPAR are continuously using 100% of two 
cpu. We are on EC12 with z/VM SSI 6.2, two IFL's CPU's, 61440 MB of RAM, 4096 
Extended RAM and the guest are running on SLES 11SP2. Do anyone has similar 
problems or there is a kernel update for this issue.

Regards,

Victor Echavarry
System Programmer, EVERTEC LLC





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guaranteed on the Internet, and as such EVERTEC, Inc. and its affiliates accept
no liability for any damage caused by any virus transmitted by this email.

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Re: High cpu utilization on vm/linux LPAR

[Barton Robinson]

no db2, no websphere, just oracle and cron/perl/scripts.

I'll be hosting the Performance workshops again after a year off. This
might be a good time for those of you with good performance tools to
come in for some education.see
http://velocitysoftware.com/seminar/workshop.html; for more
information.  This kind of diagnostics becomes much easier with a little
education.  I would also recommend Performance Analysis 42 for which we
go thru in detail in the workshop:
http://velocitysoftware.com/present/flowchrt.pdf,

On 1/10/2014 9:22 AM, Dean, David (I/S) wrote:

Db2fmcd also has known issues.  IBM has a workaround you can GOOGLE.

-Original Message-
From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of Barton 
Robinson
Sent: Friday, January 10, 2014 12:19 PM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: High cpu utilization on vm/linux LPAR

This could be just new year workload.  Or someone is running some new scripts 
that are consuming LARGE amounts of CPU.  The data shows nothing strange in the 
CPU distribution between servers:

Report: ESAUSP2
   ---CPU time--
UserID   (Percent) T:V
/Class   Total  Virt Rat
 - - ---
01/08/14
10:01:00 192.0 183.7 1.0
   ***Top User Analysis***
L220P26.25 25.80 1.0
L216P24.94 22.64 1.1
L20DP24.10 23.61 1.0
L217P23.21 20.79 1.1
L209T21.59 21.43 1.0
L218P18.50 18.34 1.0
L20CT18.03 17.06 1.1
L20BP 7.76  7.62 1.0
L210P 6.89  6.58 1.0
L214P 4.79  4.53 1.1

And from a linux perspective,  looking at the cpu by application, oracle is consuming quite a bit  
- but it really looks like someone is running short perl  scripts continuously that are consuming 
large amounts of data.  (*PROD is the group of linux servers making up production, so this is 
across all servers) .  The init bucket is a catchall for short term (less than 1 
minute) processes who's parent process is init.  Thus the high children use in INIT for 
production.

Report: ESALNXA  LINUX HOST Application Report
Monitor initialized: 01/08/14 at 10:00:00 on 2827 ser
-
Node/Process/ID---Processor Percent---
Date Application ProcessChildren
Time name  Total sys  user syst usrt
 --- - -    
*Prod*Totals*0 132.0 37.9 66.9 14.6 12.6
   init0  19.9  0.10 11.3  8.5
   kernel  0   5.0  5.0000
   multipat0   2.0  1.4  0.600
   oracle  0  79.1 19.0 59.9  0.20
   perl0   8.8  0.8  2.5  1.8  3.7
   snmpd   0   6.4  4.7  1.700
   tnslsnr 0   8.0  6.3  0.7  1.0  0.1
*Dev *Totals*0  39.5 11.9 26.9  0.3  0.5
   init0   0.700  0.2  0.4
   kernel  0   0.5  0.5000
   oracle  0  36.6 10.1 26.400
   perl0   0.2  0.1  0.0  0.1  0.0
   snmpd   0   1.1  0.8  0.300
   sshd0   0.2  0.1  0.100
*Util*Totals*0   0.4  0.2  0.1  0.1  0.1
   db2fmcd 0   0.3  0.00  0.1  0.1
   snmpd   0   0.2  0.1  0.100

On 1/10/2014 8:00 AM, Victor Echavarry Diaz wrote:

  From a couple of days one of our Linux LPAR are continuously using 100% of 
two cpu. We are on EC12 with z/VM SSI 6.2, two IFL's CPU's, 61440 MB of RAM, 
4096 Extended RAM and the guest are running on SLES 11SP2. Do anyone has 
similar problems or there is a kernel update for this issue.

Regards,

Victor Echavarry
System Programmer, EVERTEC LLC





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Please note that any views or opinions presented in this email are
solely those of the author and do not necessarily represent those of
EVERTEC, Inc. or its affiliates. Finally, the integrity and security
of this message cannot be guaranteed on the Internet, and as such
EVERTEC, Inc. and its affiliates accept no liability for any damage caused by 
any virus transmitted by this email.

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web site outage (LINUXVM.ORG, VelocitySoftware.COM)

[Barton Robinson]

Due to hardware upgrade, several websites that we host on our z/VM
systems will be down on thursday.  This includes:
LINUXVM.ORG
LINUXVM.COM
VelocitySoftware.com
DEMO.VelocitySoftware.com

If everything goes write, the new Velocity Cloud will be much bigger
than ever on Friday.  Our VERY old P390 (18Mhz) will host the IP address
until we're back in operation.

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Re: VM Monitor

[Barton Robinson]

Guys, you DO know I read this stuff?
Anybody that knows me, had a beer with me, or much about my business
would never imagine me working for someone else.  I work hard at being a
technology leader - that means investing in things the bean counters
can't even imagine having value, investing in a large support structure
that can't possibly be justified, and doing performance research that is
key to many of you.  Of course, if y'all want higher prices, less
support, and me to take off on a big sail boat, voting can start -
probably the tivoli guys and Kurt should be disqualified from voting.
And anybody else that has tried to buy the company.   And, everyone on
my team will jump thru hoops, just say how high.  Just not burning hoops.

On 10/3/2013 9:19 AM, Dean, David (I/S) wrote:

Or just wait until CA buys them.

-Original Message-
From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of David 
Boyes
Sent: Wednesday, October 02, 2013 11:55 AM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: VM Monitor

Note that CA can also sell you licenses for at least some of Velocity's 
products, so if you have a relationship with CA, that might be an easier route 
to go than making your procurement guys do anything out of the ordinary.




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Re: VM Monitor

[Barton Robinson]

Mauro, please Read That Fine Manual/article again, licensing does NOT
equal acquisition.


 product news

CA Technologies Signs Global Licensing and Distribution Agreement with
Velocity Software, a Leading Linux Performance Management Company
http://www.ca.com/us/news/Press-Releases/na/2011/ca-technologies-signs-global-licensing-and-distribution-agreement-with-velocity-software.aspx


On 10/3/2013 2:04 PM, Mauro Souza wrote:

Wait until CA buys them.

I think CA already did that:
http://www.ca.com/us/products/detail/velocity-zvps-performance-suite.aspx

Mauro
http://mauro.limeiratem.com - registered Linux User: 294521
Scripture is both history, and a love letter from God.


2013/10/3 Dean, David (I/S) david_d...@bcbst.com


Or just wait until CA buys them.

-Original Message-
From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of
David Boyes
Sent: Wednesday, October 02, 2013 11:55 AM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: VM Monitor

Note that CA can also sell you licenses for at least some of Velocity's
products, so if you have a relationship with CA, that might be an easier
route to go than making your procurement guys do anything out of the
ordinary.



From: Linux on 390 Port [LINUX-390@VM.MARIST.EDU] on behalf of Dave Jones
[d...@vsoft-software.com]
Sent: Wednesday, October 02, 2013 11:05 AM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: VM Monitor

If you can't get Velocity's suite of tools (they're excellent), try taking
a look at Perfkit and OmgeaMon XE for zLinux. OmegaMon XE for zLinux can
also feed performance data into a z/OS - OmegaMon environment, if you're
running that as well.


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Re: VM Monitor

[Barton Robinson]

all good.
On 10/3/2013 2:42 PM, Gregg Levine wrote:

Hello!
Thank you Barton. Now did I properly describe the situation? The
important phrase was indeed licensing in your statement. I chose
simply acting as a vendor. I didn't want to go into too much detail.
-
Gregg C Levine gregg.drw...@gmail.com
This signature fought the Time Wars, time and again.


On Thu, Oct 3, 2013 at 5:32 PM, Barton Robinson
bar...@velocitysoftware.com wrote:

Mauro, please Read That Fine Manual/article again, licensing does NOT
equal acquisition.


  product news

CA Technologies Signs Global Licensing and Distribution Agreement with
Velocity Software, a Leading Linux Performance Management Company
http://www.ca.com/us/news/Press-Releases/na/2011/ca-technologies-signs-global-licensing-and-distribution-agreement-with-velocity-software.aspx



On 10/3/2013 2:04 PM, Mauro Souza wrote:

Wait until CA buys them.

I think CA already did that:
http://www.ca.com/us/products/detail/velocity-zvps-performance-suite.aspx

Mauro
http://mauro.limeiratem.com - registered Linux User: 294521
Scripture is both history, and a love letter from God.


2013/10/3 Dean, David (I/S) david_d...@bcbst.com


Or just wait until CA buys them.

-Original Message-
From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of
David Boyes
Sent: Wednesday, October 02, 2013 11:55 AM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: VM Monitor

Note that CA can also sell you licenses for at least some of Velocity's
products, so if you have a relationship with CA, that might be an easier
route to go than making your procurement guys do anything out of the
ordinary.



From: Linux on 390 Port [LINUX-390@VM.MARIST.EDU] on behalf of Dave Jones
[d...@vsoft-software.com]
Sent: Wednesday, October 02, 2013 11:05 AM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: VM Monitor

If you can't get Velocity's suite of tools (they're excellent), try
taking
a look at Perfkit and OmgeaMon XE for zLinux. OmegaMon XE for zLinux can
also feed performance data into a z/OS - OmegaMon environment, if you're
running that as well.


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Re: Oracle RMAN OOM

[Barton Robinson]

Really good performance monitors would give you lots of good information.

On 10/2/2013 4:28 AM, van Sleeuwen, Berry wrote:

If anything I even would like to decrease the memory configuration rather than 
increase it. Unfortunately I got overruled by the Oracle guys who still think 
more memory means better performance. During the migration from Oracle 10 to 
Oracle 11 we have gone up from 5400M to 6G. I don't like to give more memory 
for various reasons. Some of them can be found in the list, I have discussed 
this a few years back.

In this case, why add memory only to support poorly configured processes? As 
mentioned, the backup process in a full backup runs without any additional 
memory load and uses 3G memory in an incremental backup. That makes no sense to 
me.

Regards, Berry.

-Original Message-
From: Linux on 390 Port [mailto:LINUX-390@vm.marist.edu] On Behalf Of Michael 
MacIsaac
Sent: Wednesday, October 02, 2013 12:47 PM
To: LINUX-390@vm.marist.edu
Subject: Re: Oracle RMAN OOM



The guest has 6G memory and 4G swap.

...

How can we tune this system to avoid getting hit by the OOM condition?

Did you try giving the virtual machine more memory?  Is 6G a special number for 
this workload?

Mike MacIsaac mikemac at-sign us.ibm.com

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Re: Dedicated IFL shows 100% busy running essentially nothing

[Barton Robinson]

dedicated IFL's or GPs always look 100% busy from the LPAR perspective,
and that is the data fed into RMF or CP Monitor

On 8/20/2013 9:01 AM, Richards, Robert B. wrote:

My VM/Linux guy came to me with a several disparate displays (a HMC Activity 
Display, a TMONMVS LPAR Summary screen and s RMFIII Overview/CPC Summary 
screen) of a sandbox VM system not running any guest machines, Linux, etc. but 
is running with one *dedicated* IFL.

Here is the question: Why does the HMC show 1% busy and the other two show 100 
logical busy and 50% physical busy?

The other IFL is running two VMs with Linux guests and the utilization matches 
(approximately) on all three displays.

Any clues would be appreciated!

Bob

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Re: CPUPLUGD or VMRM-CMM or CMMA

[Barton Robinson]

CMMA is gone, didn't work right and support was pulled.
VMRM does not have proper feedback and is more likely to crash your
linux server than help
CPUPLUGD - never seen any measured value.
Focus on understanding the storage requirements. One of the
presentations at the VMWorkshop last week was Understanding LInux
Storage

On 6/27/2013 6:09 AM, Veencamp, Jonathon D. wrote:

Hello list,

It's been a few years since I looked at these memory management tools, and back 
then there were some concerns about the production readiness of CMM or CMMA for 
prod environments.  It looks like CPUPLUGD can also do memory ballooning via 
CMM?  The problem I'm trying to solve is to use ZVM memory most efficiently for 
our zLinux guests running lots of java processes with variable heap sizes.   I 
am not much concerned about dynamically changing the number of processors 
assigned.

Is there a consensus on the best tool for that?  Stability is probably be the 
foremost concern.  This will be implemented in SLES 10 SP4 and SLES 11 SP2 running under 
ZVM 5.4 environment, and migrating to ZVM 6.2 later this year.  Any advice on what I 
should focus on first would be appreciated.

Jon Veencamp



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cloud on z/vm

[Barton Robinson]

I've seen several installations over the last few years build their own
web based applications for cloning.  That was my incentive for producing
a low cost web based application that included cloning
(http://VelocitySoftware.com/zpro.html;) and to provide some level of
standardization.

How many installations are there out there that claim some level of
cloud computing on z/vm

I can think of many educational or porting projects that would provide
great opportunities for upgrading your mainframe image, but I don't
here about many people outside of my immediate contacts that are pushing
cloud within their enterprise. I do hear a lot about cloud from vendors
with vmware solutions.

My paid advertisement, http://VelocitySoftware.com/cloud.html; is how
we are attempting to meet current requirements in this area, but I'm
more interested in hearing stories about what you folks are doing on the
platform.


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attachment: BARTON.vcf

Re: MIPS increase after SLES11 SP1 patches

[Barton Robinson]

If you investigate the ESALNXP report provided by ZVPS, you will see a
cron job with your latest patches, and not before that.  One just
needs good tools

Srivastava, Sagar wrote:





We implemented latest patches on our SLES11 SP1 systems recently



Now all the zLINUX guest are using almost 8 - 10 IFL mips  extra per
Guest - that is increasing our load on the z/VM LPARs by 300 mips .
Unfortunately this is not so visible from the guest level and hence
difficult to find the culprit process/component. We have around 35
guests per LPAR.



  I know there is some degree of overhead with patching and security -
but this seems excessive.



Our workload is primarily websphere/java applications type.





I have tried:

1) investigating top/sar etc command and process lists

2) checked Omegamon-can pinpoint nothing yet

3) several linux commands tools to (iostat/mpstat/iptraf etc but can
find nothing.





Any insight from the gurus? Has anyone noticed this situation? Thanks
for going through my long note.



Sagar Srivastava

ISO,

jersey city





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attachment: BARTON.vcf

Re: Central vs. Expanded Storage - current recommendation

[Barton Robinson]

please make 20% of your storage ExStore.  This only matters if you are
storage constrained, so benchmarking differences when there are no
constraints will not show a difference.  When you become storage
constrained, the 20% ExStore will easily show better performance.

Richards, Robert B. wrote:

I was wondering what the latest recommendation is on managing storage for z/VM 
with several dozen Linux guests.

We are moving a z/VM lpar (let's call it VM2) with 12.3GB CS and 2.3 ES to 
another CEC. Presently, VM2 competes with VM1 and a normally idle VM3 sysprog 
lpar for usage on one IFL.

On the second CEC (both are z9BC boxes, btw), it will be the only user of the 
IFL.

We are debating whether to define the memory as all CS or to leave the 2.3 ES 
alone.

Running z/VM 5.4

Bob

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attachment: BARTON.vcf

Re: New book: Linux Health Checker 1.0 User's Guide

[Barton Robinson]

It's called zTUNE.  http://velocitysoftware.com/zztune.html;

Michel Beaulieu wrote:

Hello Linux-390,

I know this is the LINUX-390 list,

However, let me ask:
Do we have any equivalent System Health Checker for z/VM?

Michel Beaulieu
IBM SO-Delivery (Canada)




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attachment: BARTON.vcf

Re: Does anyone use Microsoft's SCOM monitoring tool with zLinux?

[Barton Robinson]

And ZVPS from Velocity Software supports microsoft as well as linux on
x86 for operations as well as full performance management.

David Boyes wrote:

Looking at the Microsoft websites (not very
helpful of course, more marketing, little
technical) for SCOM (System Center Operations Manager 2007 R2), I do see it
can be used with Linux, but does not get into the detail of which architecture.
I would safely assume x86, but would it work on s390x?


The generic SNMP support works fine with SCOM if you install netsnmp on the 
Linux guests and load the appropriate MIB files into SCOM. Microsoft doesn't 
supply a 390x binary for their extended agents, so the amount of introspection 
you can do is limited, but if standard MIB2 stuff is good enough, that works 
fine.

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attachment: BARTON.vcf

Re: Question about zVM and MF configuration

[Barton Robinson]

one lpar works well, shares storage, shares other resources, reduces 
overhead, reduces system programming efforts, reduces costs. And I can 
show other mixed mode LPARs with both VSE and linux in the same LPAR. 
Was it a hardware vendor recommending increasing your hardware costs


Michael Simms wrote:

I hope everyone had a safe and happy one Holiday Season.

I need some guidance, advice and/or ammunition on an issue that has come up regarding mainframe configuration.  


I have found myself having to defend the way we are now configured  vs. a 
co-worker who has come back from
class saying his instructor said we should run 2 LPARs,
one with zVM and zVSE and the other one house our production zLinux and DB2
images. My co-worker has no mainframe experience and does not know
our hardware or complete software configuration. Apparently my co-worker fears
VSE ‘interference’ with his zLinux images as well as a fear that he would crash
the zVM system. Not sure what he has in his plans that would cause such zVM instability.  
 
We currently have: z114, 1 partial

CP, 1 IFL, 24GB storage (18/6), 2 FICON cards, 2 OSA cards, 1 zVM LPAR with 
both CPUs,
zVM V6.1, zVSE, zLinux of various flavors SuSE running and DB2 running in 
several
or more zLinuxes. Don’t know how many DB2 zLinux images yet. We
already have a couple of production zLinux and are exploring another set of
zLinux that would maybe use the zVSE VSAM Redirector and DB2. I suggest that we
add to our current configuration as it would better share resources such as
memory and I/O. I also feel that it would be easier to manage 1 LPAR instead of
2 LPARs and all their various pieces and parts that would also include zVM test
machines and 2 test VSE machines.
 
I have tried to explain how mainframe architecture and zVM have

been designed as a sharing environment while at the same time protecting
against influences from any given guest machine, should the configuration be
configured just right. I might have partially agreed with his instructor had
not zVM come to support all manner of CPU in recent years, for example 
accommodating
both CP and IFLs. We are also on a limited budget and I don’t know if we’d be
able to purchase more storage or Chpids. Based on my years experience, I have poked, prodded and received advice for our system to where we have great performance today, both traditional and non-traditional workloads.  
 
Does anyone have suggestion/points to argue one way or the

other? Do you have some examples of something similar, one way or another, to
what we have or will soon have? You probably would like some more input
variables? Just let me know and I’ll provide. 


I appreciate any and all feedback!

Thanks.

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attachment: BARTON.vcf

Re: z/VM Switch performance

[Barton Robinson]

Re performance, there has been no need to change time slice since qdio, 
about 5 years ago.


Offer Baruch wrote:

Hi all,

Well we conducted another test (much better than the last one - it had too many 
unpredictable variables):
1. 1 destination machine let's call it dest1 
2. dest1 has 2 nics

2.1 vlan 411 access mode thru a VSWITCH
	2.2 vlan 420 trunck mode directly thru osa devices (different OSA then the VSWITCH) 
3. 1 source machine lets' call it source1

4 same nic configuration as dest1
5. using two different ssh connections to srouce1, we run the ping command to 
the dest1 machine:
5.1 first ping from source1 is to dest1 vlan 411
5.2 second ping from source1 is to dest1 vlan 420
6. what we were trying to prove is that the same 2 machine at the same time 
will respond much better using the OSA directly then using the VSWITCH.
7. well... we failed to prove that... as when the VSWITCH pings peeked so did 
the OSA pings.. we didn't expect that.

So, the problem is not the VSWITCH and not the OSA as the peeks happen on both 
of them simultaneously.
Our next guess is that  SRM dispatching time slice is too big. Please share if 
you have a better idea...

The default is 5ms? Really? So, If I have 5 machines in the dispatch list 
(let's say with 1 CPU) it is very possible that a simple ping will take 25ms.
Now we have 2 IFLs running about 15 guests on 1 z/VM and another z/VM on the 
same CEC (sharing the 2 IFLs) with about 4 guests that does not do much (PR/SM 
weight is 98% to the big z/VM and 2% to the small).
Total CPU utilization is at about 80%.
We are having trouble on the big z/VM :-)
Although not all guests has the same share (and I admit that I don't fully 
understand how the shares really work - I have read more than one article about 
it) 15 times 5 ms devided by 2 IFLs is 37.5ms.
And what if the guest answering the ping is busy with other stuff (like real 
application work) it can be in the next time slice.. that is 75ms.

Just to be clear. We really don't care about the ping response time. We are 
having real performance issues and just can’t find the reason. CPU is not 
utilize and we can still see stolen time on all guests.

Did any of you changed your time slice settings? Does this make any sense to 
you CPU performance experts.

Thanks!
Offer Baruch


-Original Message-
From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of Leland 
Lucius
Sent: Friday, October 28, 2011 7:41 AM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: z/VM Switch performance

On 10/27/11 11:07 AM, Marcy Cortes wrote:

Offer, I do get the erratic pings too.  Not as high as 200, but some 50s.

It was reported to me a few weeks ago by one of our more sophisticated users 
that traceroute occasionally fails over the same vswitch.
Run it like 20 times 1 right after another to recreate or use the -q option 
with something like -q 8.

I checked with another customer and he also saw the same behavior.

I opened a PMR with VM but they said to open one with Linux.  I have not gotten 
around to opening one with Novell yet.

Could some of you others out there try this simple ping test?

We are also vlan aware and it does happen on both LACP and non-LACP.


We have both aware and unaware VSWITCHes.


Results of two guests connected to the same aware VSWITCH and on the same VLAN:


pzawap01:~ # traceroute pzawap03
traceroute to pzawap03 (172.2.2.211), 30 hops max, 40 byte packets
 1  pzawap03.svc (172.2.2.211)  0.114 ms   0.134 ms   0.016 ms
pzawap01:~ # traceroute pzawap03
traceroute to pzawap03 (172.2.2.211), 30 hops max, 40 byte packets
 1  pzawap03.svc (172.2.2.211)  0.055 ms   0.136 ms   0.024 ms
pzawap01:~ # traceroute pzawap03
traceroute to pzawap03 (172.2.2.211), 30 hops max, 40 byte packets
 1  pzawap03.svc (172.2.2.211)  0.000 ms * *


Results of two guests connected to the same unaware VSWITCH:


pzsdns01:~ # traceroute 192.1.1.28
traceroute to 192.1.1.28 (192.1.1.28), 30 hops max, 40 byte packets
 1  192.1.1.28 (192.1.1.28)  0.199 ms   0.036 ms   0.074 ms
pzsdns01:~ # traceroute 192.1.1.28
traceroute to 192.1.1.28 (192.1.1.28), 30 hops max, 40 byte packets
 1  192.1.1.28 (192.1.1.28)  0.189 ms   0.492 ms *
pzsdns01:~ # traceroute 192.1.1.28
traceroute to 192.1.1.28 (192.1.1.28), 30 hops max, 40 byte packets
 1  192.1.1.28 (192.1.1.28)  0.140 ms   0.038 ms   0.087 ms
pzsdns01:~ # traceroute 192.1.1.28
traceroute to 192.1.1.28 (192.1.1.28), 30 hops max, 40 byte packets
 1  192.1.1.28 (192.1.1.28)  0.244 ms   0.044 ms   0.026 ms
pzsdns01:~ # traceroute 192.1.1.28
traceroute to 192.1.1.28 (192.1.1.28), 30 hops max, 40 byte packets
 1  * * *
 2  * * *
 3  * * *
 4  * * *
 5  * * *
 6  * * *
 7  192.1.1.28 (192.1.1.28)  0.306 ms   0.196 ms   0.286 ms


Results from a guest on an unaware VSWITCH to a guest on a different unaware 
VSWITCH (same LPAR)


pzsdns01:~ # traceroute pzsadm01
traceroute to pzsadm01 (172.1.1.35), 30 hops max, 40 byte packets
 1  192.1.1.1 (192.1.1.1)  0.289 ms  

Re: WebSphere Application Server - Idle Server Tuning

[Barton Robinson]

Before I get REALLY excited, has anyone tried this and validated they
can get Linux servers running WAS to drop from QUEUE (as in drop from
QUEUE 3)?

Jim Elliott wrote:

I don't believe this has been posted here before, but IBM has
published a TechDoc on this subject.

http://ibm.com/support/techdocs/atsmastr.nsf/WebIndex/WP101894

Jim


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attachment: BARTON.vcf

Re: Communication Controller for Linux, monitoring

[Barton Robinson]

Are you looking at monitoring network traffic? uptime? availability?
resource consumption?  ZVPS ( http://velocitysoftware.com/zvps.html; )
does all that and more.

Kowalski, Steve S wrote:

Hello,
Is anyone using any monitoring tool (except the MOSS Console) for Communication 
Controller for Linux?
Any recommendation?
Thank you very much.
Have a nice day,
Steve Kowalski
Standard Bank email disclaimer and confidentiality note
Please go to http://www.standardbank.co.za/site/homepage/emaildisclaimer.html 
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attachment: BARTON.vcf

Re: Set Share Relative

[Barton Robinson]

I really despise the system defaults of REL 1500, or REL 5000.  They
seem (were) provided by someone ignorant of how the scheduler actually
works.
Rob has a nice paper showing the damage.  Though ibm might try and code
around how this damage impacts your system, changing these defaults to
realistic (ABSolute) values will minimize impact when there is a problem.
Of course, none of this matters when you have too much money, too much
resource, and no problems.  Benchmark systems comes to mind.

And my vote is de-prioritizing.

Dean, David (I/S) wrote:

Is there a rule of thumb on setting relative shares for zVM users?  Default has 
them at 100, we have


increased important ones to 200.  I noticed the system users have very
high shares, e.g. 1500.  So, when

you are prioritizing, or de-prioritizing should you go in small
incremental (25-50) or larger (say 100, 200)?



David M. Dean
Information Systems
BlueCross BlueShield Tennnessee

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attachment: BARTON.vcf

Re: MONDCSS after IPL

[Barton Robinson]

it's really hard to make the mondcss go away unless there was a purge
done, and when the application went away, so did the dcss

Dean, David (I/S) wrote:

How do you make MONDCSS permanent?  We IPL'd, the segment did not come back, 
and monitoring is not working.  I know how to set it up manually, but why did 
it not come back at IPL?


David M. Dean
Information Systems
BlueCross BlueShield Tennnessee

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attachment: BARTON.vcf

CICS to Linux, I like it...

[Barton Robinson]

Just in from IBM systems magazine.  CICS on z/os workloads moving to
Linux on z.  wow.


Organizations are consolidating workloads onto Linux on IBM System z to
lower costs, standardize operations and enhance IT flexibility. Now you
can move online and batch mainframe applications to scalable Integrated
Facility for Linux (IFL) processors without sacrificing functionality or
performance. In this webinar you will learn:

* How four divisions of the German pension-management agency,
Deutsche Rentenversicherung (DRV), migrated a large, central IBM CICS
application from an IBM z/OS environment to Linux on IBM System z
* How UniKix Mainframe Rehosting software protects existing
investments by enabling legacy workloads to run on mainframe Linux
partitions How your business can benefit from the best practices and
lessons learned by the DRV and other organizations to maximize benefits
and reduce risk when replatforming legacy workloads
* The DRV intends to use this agile platform to continue
consolidation and implement SOA initiatives. Discover how a similar move
can benefit your business.

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attachment: BARTON.vcf

Re: Moving Oracle off zLinux boxes -- comments from the field?

[Barton Robinson]

so is this guy a troll or just someone clueless (and i'm tryin to be
nice). And I assume that Alan is behind the wood shed counciling...

Considering Oracle is extremely virtual friendly where DB2 is completely
virtual hostile (polling at 200,000 times a second was for High
Availability or something silly). Considering MANY positive experiences
presented around the world for Oracle, and zero for DB2, i just better stop.

Christopher Cox wrote:

Oracle is NOT supporting them well on zLinux.   So... there's both the
financial and technical reason.

Why would anyone stay with a platform that is not well supported?  Oracle
couldn't handle it, so they are moving.

Now... certainly the false mindset issue surrounding mainframes is an
issue... but I'd probably move Oracle too if they weren't willing to
address support issues in a timely manner.

Maybe it's time to change your database supplier??  You know, if if you
have to move it, I wonder if moving to something a bit more heavy duty,
like a IBM Power7 box was even considered...  If DB2 isn't an option, maybe
Oracle on Power7 would be a better fit (saying without knowledge of
Oracle's commitment of support there as well).




From:   Barton Robinson bar...@vm1.velocity-software.com
To: LINUX-390@vm.marist.edu
Date:   03/18/2011 04:04 PM
Subject:Re: Moving Oracle off zLinux boxes -- comments from the field?
Sent by:Linux on 390 Port LINUX-390@vm.marist.edu



wow, your DBAs have the authority to spend that kind of money and make
that kind of change without management signature? So no financial
analysis, no technical reason, sounds religious.

CHAPLIN, JAMES (CTR) wrote:

We just had a surprise announcement by one of the Oracle DBAs during a
zLinux  Application group planning meeting at our worksite. The DBA
advised us that they (Database group) were going to move/migrate all the
Oracle databases that we have on zLinux boxes off to an intel/unix
platform. He did not offer details of the hardware, or when or how, just
that they were going to do it. This is a bite of a surprise as we have
just moved our MQ off the Mainframe (zOS) to the zLinux platform (guests
on zVM) and that move is doing well. This may be due in part to the
false mindset that we have in our upper management at our site that
Mainframes are old technology. Also we have had slow response from
Oracle on resolving issues we have identify (certifying Oracle 11 on
z390x architecture, getting Oracle 10 support for RHEL 5.0 on z390x
architecture). Has anyone else on this list had any related war
stories similar to what we may be about to experience as this move
takes place?



James Chaplin

Systems Programmer, MVS, zVM  zLinux



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attachment: BARTON.vcf

Re: Moving Oracle off zLinux boxes -- comments from the field?

[Barton Robinson]

wow, your DBAs have the authority to spend that kind of money and make
that kind of change without management signature? So no financial
analysis, no technical reason, sounds religious.

CHAPLIN, JAMES (CTR) wrote:

We just had a surprise announcement by one of the Oracle DBAs during a
zLinux  Application group planning meeting at our worksite. The DBA
advised us that they (Database group) were going to move/migrate all the
Oracle databases that we have on zLinux boxes off to an intel/unix
platform. He did not offer details of the hardware, or when or how, just
that they were going to do it. This is a bite of a surprise as we have
just moved our MQ off the Mainframe (zOS) to the zLinux platform (guests
on zVM) and that move is doing well. This may be due in part to the
false mindset that we have in our upper management at our site that
Mainframes are old technology. Also we have had slow response from
Oracle on resolving issues we have identify (certifying Oracle 11 on
z390x architecture, getting Oracle 10 support for RHEL 5.0 on z390x
architecture). Has anyone else on this list had any related war
stories similar to what we may be about to experience as this move
takes place?



James Chaplin

Systems Programmer, MVS, zVM  zLinux


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attachment: BARTON.vcf

Re: Gotcha's

[Barton Robinson]

Well, since you are ready.

First, Oracle is VERY virtual friendly. And has been the most virtual
friendly application there is.

BUT, if you use RAC, it seems that someone decided to compete in the
virtual hostile arena by making it poll at a high enough rate to
ensure you need to buy a LOT more real mainframe storage to support it.
 So until that is fixed, DO NOT USE RAC on Z until this is corrected

Damian Gallagher wrote:

Well, there shouldn't be any gotcha's, if the installation material and the 
articles on My Oracle Support are all up to date :-) The plan is, it should all 
work, if we say it should.

If it doesn't work, open a service request. If that doesn't work, ping me and 
I'll have a wee chat with the relevant peeps to make sure that it does. If you 
KNOW of gotchas, advertise them as you want, but my job will of course be to 
reduce their life expectancy as far as possible :-)

Cheers
Damian


-Original Message-
From: David Stuart [mailto:david.stu...@ventura.org]
Sent: 15 February 2011 17:23
To: LINUX-390@vm.marist.edu
Subject: Re: Gotcha's

I would be interested, too, as I'm in the process of installing Oracle and 
trying to get all the management tools to run.

Right now, the database is up and running, but some of the management tools 
won't start.


Thanks,
Dave






Dave Stuart
Prin. Info. Systems Support Analyst
County of Ventura, CA
805-662-6731
david.stu...@ventura.org Davey, Clair cda...@scspa.com 2/15/2011 8:25 AM 

I would like to hear some of your 'gotcha's when running Oracle
databases on Linux on Zeries.  You can send them offline if you would
like.

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attachment: BARTON.vcf

Performance Education scheduled

[Barton Robinson]

For those of you interested in performance, or performance management of
your Linux and z/VM environment, our Performance Education schedule is
now posted for 1st half, at
http://velocitysoftware.com/seminar/index.html;.

Offerings are the 4 day workshop and 1 day seminars.

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Re: Guest configuration question

[Barton Robinson]

Rules of thumb change, or get old. The linux spin locking has greatly
improved.  new evidence is showing that letting z/vm do the scheduling
is more efficient for later releases of Linux - as long as there are no
spin locks occurring.  For example, in a one-ifl configuration, having
WAS servers run with 2 virtual CPUs runs better.

Samir Reddahi wrote:

Hi Joe,

The IBM manuals state that you never assign more virtual cpus to a user
than there are real cpus, because this creates unnecessary overhead.
quote:

Virtual CPU requirements
In general, follow this guideline: define as many virtual CPUs as needed
(maximum CPU resources required), but do not exceed the number of real
processors assigned to this LPAR. Extra virtual CPUs just add to the
overhead and
potentially increase the software multiprocessing factors.


Best Regards
Samir Reddahi



From:   Joe Martin widet.jmar...@gmail.com
To: LINUX-390@VM.MARIST.EDU
Date:   13/10/2010 16:43
Subject:Guest configuration question
Sent by:Linux on 390 Port LINUX-390@VM.MARIST.EDU



Have a development system that has 2 IFLs and both are configured to the
LPAR running z/VM.  Have several SUSE Linux 11 guests running and the LPAR
is busy during the day - high 90s percent busy as displayed by Velocity. I
noticed yesterday that two of the busier systems have *3* vCPUs configured
to them.  I'm wondering if that will hurt or help performance of the guest
(or maybe be of no consequence) when the LPAR is very busy.

Thanks,

Joe

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Re: Guest configuration question

[Barton Robinson]

The consideration is the LPAR overhead. The more dispatching there is,
the more is the physical overhead. I've seen that running as high as
5% of each processor on overcommitted systems, and .1% normally.

Joe Martin wrote:

Have a development system that has 2 IFLs and both are configured to the
LPAR running z/VM.  Have several SUSE Linux 11 guests running and the LPAR
is busy during the day - high 90s percent busy as displayed by Velocity.  I
noticed yesterday that two of the busier systems have *3* vCPUs configured
to them.  I'm wondering if that will hurt or help performance of the guest
(or maybe be of no consequence) when the LPAR is very busy.

Thanks,

Joe

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Re: Virtualization with the Best TCO?

[Barton Robinson]

Isn't the real problem that the VMWare vendor(s) does a LOT of
advertising and marketing, and the z/VM vendor does not (other than
preaching to the choir)?

Graves, Aaron wrote:

The implication is that these represent the leading edge of

virtualization, completely ignoring z/VM's capabilities.  This
happens time after time, conference after conference and webcast
after webcast.  It's almost like z/VM with zLinux exists in some
parallel universe that is outside the perception of the distributed
world.


-Original Message-
From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On Behalf Of Alan 
Altmark
Sent: Wednesday, August 25, 2010 12:37 AM
To: LINUX-390@vm.marist.edu
Subject: Re: Virtualization with the Best TCO?

On Tuesday, 08/24/2010 at 03:16 EDT, Graves, Aaron
aaron.gra...@citi.com wrote:

How about a z/VM zLinux response to this?



http://www.computerworld.com/pdfs/RedHat_Enterprise_Linux_has_Best_TCO.pdf

Not sure what you're looking for, Aaron, as Red Hat says nothing about
System z, limiting the comparison of their KVM-based system to VMware
vSphere and Microsoft Windows Hyper-V.

Alan Altmark
z/VM Development
IBM Endicott

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Re: mono keep guest active

[Barton Robinson]

Yes, this is a problem. We call it virtual hostile.  Rob van der Heij
has been doing a tremendous amount of research in this area for the last
4 years, we've been trying to educate our customers (and IBM) on what
this means.

Back in 2001, there was the Linux timer, had the same problem.  Got that
fixed.  This is the same problem.  Only originally because the CPU was
so slow, it was seen as a CPU problem.  With much faster CPUs now, this
is a storage problem.  There are ways to alleviate the storage problem
in our research. The list of virtually hostile software is quite long.

van Sleeuwen, Berry wrote:

Hi listers,

We have configured a SLES11 SP1 with apache and mono. When we start the
httpd the server is active all the time, keeping it in Q3 all the time.
We have determined that indeed the mono module is the cause for the
wakeup of the guest. Powertop shows that 50%-65% of the time mono was
responsible for wakeup-from-idle and when we remove mono the guest drops
from queue.

We have been looking at some options at this time.

First we have changed KeepAlive too Off in server-tuning.conf, but no
luck.

Next we have created a new configuration for mono in the
/etc/apache2/conf.d directory to replace the default mod_mono.conf.

# note, this config has been created using an online tool to create
configfiles... we added LoadModule and MONO_MANAGED_WATCHER.

  LoadModule mono_module /usr/lib64/apache2/mod_mono.so
  Alias /sds /srv/www/htdocs/sds
  MonoServerPath sds /usr/bin/mod-mono-server2
  MonoSetEnv sds MONO_IOMAP=all;MONO_MANAGED_WATCHER=disable
  MonoApplications sds /sds:/srv/www/htdocs/sds
  Location /sds
Allow from all
Order allow,deny
MonoSetServerAlias sds
SetHandler mono
SetOutputFilter DEFLATE
SetEnvIfNoCase Request_URI \.(?:gif|jpe?g|png)$ no-gzip dont-vary
  /Location
  IfModule mod_deflate.c
AddOutputFilterByType DEFLATE text/html text/plain text/xml
text/javascript
  /IfModule

I had found a reference for the MONO_MANAGED_WATCHER that should be set
to disable to prevent mono from watching (polling) for filesystem
updates. But this also has no effect, though I don't know for sure if
this config is really what it should be.

But all this did not yet give us a guest that drops out of queue, it
still remains in Q3. Any ideas what can we do to reduce the activity of
this guest?


Met vriendelijke groet/With kind regards,
Berry van Sleeuwen
Flight Forum 3000 5657 EW Eindhoven

( +31 (0)6 22564276





Atos Origin http://www.atosorigin.com/

MO CF SC Mainframe Services





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Re: mono keep guest active - ban the blips.

[Barton Robinson]

Yep, this is exactly the problem.  These processes do not use much 
cpu, but they blip every 10ms or so.  You need to check the queue from 
the z/VM side to see if they are in Q3. If in Q3, then they are blipping 
(think i need to trademark that word).
The reason these blips are so virtual unfriendly - think about poor 
old z/vm storage management. We need to steal some pages for some real 
work going on.  Do we steal it from the server doing real transactions? 
or from the one that is blipping? oops, we can't tell the difference.


Neale Ferguson wrote:

I¹m looking at my system which has mod_mono in the apache config file and
it¹s barely registering on top for CPU though it's quite memory hungry:

 1476 wwwrun15   0 59756  28m 6652 S  0.0  5.7  24:58.73 mono
 1477 wwwrun15   0 10264 2980 1404 S  0.0  0.6   0:00.00 httpd2-prefork
 1478 wwwrun16   0 10264 2996 1420 S  0.0  0.6   0:00.00 httpd2-prefork
 1479 wwwrun15   0 10264 2992 1420 S  0.0  0.6   0:00.00 httpd2-prefork
 1480 wwwrun16   0 10128 2824 1352 S  0.0  0.6   0:00.00 httpd2-prefork
 1481 wwwrun15   0 10128 2760 1300 S  0.0  0.5   0:00.00 httpd2-prefork
 3058 wwwrun15   0 10128 2756 1300 S  0.0  0.5   0:00.00 httpd2-prefork
 3078 wwwrun17   0 10264 2984 1404 S  0.0  0.6   0:00.00 httpd2-prefork
 3079 wwwrun15   0 10264 2976 1404 S  0.0  0.6   0:00.00 httpd2-prefork
 3080 wwwrun15   0 10264 2976 1404 S  0.0  0.6   0:00.00 httpd2-prefork

The system's been up for:

 4:56pm  up 39 days  4:37,  1 user,  load average: 0.00, 0.00, 0.00

What level of mono is installed? Is it registering when there's nobody
connected via http?

Neale

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Re: DB2 direct i/o question

[Barton Robinson]

But, Oracle is VERY virtual friendly, and DB2 is VERY virtual HOSTILE.
From a system performance perspective, I REALLY LIKE Oracle.

Mark Post wrote:

On 7/30/2010 at 12:03 PM, Marcy Cortes marcy.d.cor...@wellsfargo.com wrote:

Does this make Oracle a better fit on Linux on z than DB2?


That depends on how much you care about newer versions being certified sometime 
within your life time.


Mark Post

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Re: IBM zEnterprise System announced???

[Barton Robinson]

So the biggest announcement of the year, i'm on my second pot of coffee,
and there's still only one post about this? Is this a non-event?

Dave Jones wrote:

And what's old is new againthere's a water cooled version of the
z196. :-)

DJ

On 07/22/2010 06:38 AM, Jim Elliott wrote:

The IBM zEnterprise System has been announced. Check out the
web site at http://ibm.com/systems/zenterprise

Jim



--
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V/Soft
www.vsoft-software.com
Houston, TX
281.578.7544


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Re: IBM zEnterprise System announced???

[Barton Robinson]

Ok, i listened to the announcement too. It does solve a lot of problems.

The issue with consolidating windows workloads - this would NOT be
done with emulators on z, the cost of an intel emulator is so high (as
anyone with a EECS degree should know). So the choice is convert to
Linux, but that was not always possible, now we have the blade option
that is still managed.
Same with AIX

I think they are making the z/VM opportunities low key (yes, i did
listen to their pitch). I think the opportunities for this system are
for z/VM, but they still play like they think everything will be z/os
and managed that way. (Does that spell opportunity for a VM software
company?)  Or maybe they haven't figured out how to make all this work -
seems easy using z/vm - we already have the GP/IFLs/zaps/ziips in the
same LPAR, seems easy to extend the dispatcher to support some x86 and P
processors.

All very exciting, lots of performance research fun, the more work on a
system, the more important performance, chargeback, operational alerts
and capacity planning become.
The more sophisticated an environment, the more important something like
zPRO is needed.

I like

Marcy Cortes wrote:

Maybe everyone is waiting for the webcast.
The name is a little weird.
Sounds speedy - what do *you* think about it?


Marcy

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-Original Message-
From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On Behalf Of Barton 
Robinson
Sent: Thursday, July 22, 2010 8:33 AM
To: LINUX-390@vm.marist.edu
Subject: Re: [LINUX-390] IBM zEnterprise System announced???

So the biggest announcement of the year, i'm on my second pot of coffee,
and there's still only one post about this? Is this a non-event?

Dave Jones wrote:

And what's old is new againthere's a water cooled version of the
z196. :-)

DJ

On 07/22/2010 06:38 AM, Jim Elliott wrote:

The IBM zEnterprise System has been announced. Check out the
web site at http://ibm.com/systems/zenterprise

Jim



--
Dave Jones
V/Soft
www.vsoft-software.com
Houston, TX
281.578.7544


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Re: IBM zEnterprise System announced???

[Barton Robinson]

Alan, are you trying to make this announcement so totally boring on
purpose? Just business as usual? nothing really new and exciting?  Is
there anything here you could make exciting and explain why someone
would care?  (faster is just expected, no longer exciting, more memory?
no support by z/vm announced)

Alan Altmark wrote:

On Thursday, 07/22/2010 at 11:34 EDT, Barton Robinson
bar...@vm1.velocity-software.com wrote:

So the biggest announcement of the year, i'm on my second pot of coffee,
and there's still only one post about this? Is this a non-event?


Kind of hard to talk about the enhancements in support of zEnterprise
until folks get up to speed on it, but here are the pending z/VM
enhancements.

Of interest for zEnterprise (6.1 only):
- Support of internal management network and internal customer data
network
- Support for management using the Universal Resource Manager as a member
of an ensemble

Of interest to everyone (5.4 and 6.1, except as noted):
- Guests can now use secure-key CPACF functions
- CP can do XRC timestamping of I/O.  This includes support of STP for XRC
purposes.
- Improved HyperSwap capabilities
- Uplink support in VSWITCH.  A guest can be defined as the uplink
instead of an OSA.  A powerful enhancement to enable z-resident firewalls
in a VSWITCH configuration, and an important component of the support for
the zEnterprise System.
- Ability to turn off CP memory management 'reorder' processing
- Ability to coalescence empty page frames when needed
- Improved SSL server performance and capacity (watch for Red Alert -
migration required)
- SSL upgrade to use z/OS 1.11 version of System SSL (6.1 only) and
support for FIPS (not yet certified)

Statements of Direction:
- Single System Image with Live Linux Guest Relocation
- Common Criteria certification of z/VM 6.1
- Withdrawal of VM TCP/IP DNS server
- Withdrawal of the RESOURCE option on VMFINS

Enhancements will be delivered September through December.

Alan Altmark
z/VM Development
IBM Endicott

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Re: How find what resource is needed

[Barton Robinson]

You really need a decent performance monitor. I can already see that 
your settings would not be my view of best practices


Rogério Soares wrote:

Listeners,

 I have a strange problem again...



on my lpar for development, i have now queue E3, each time a run #cp q exp i
have a different machine on this queue...

i look for cpu usage, is acceptable at this time, mean an 80, 90% cpu
usage... some free memory... and no hard i/o activity


NAGD101   E3 PS  00498505/00498684   769.0 A00


there is a way to know what resource is missing for this machines?

What kind of things i should be attent to determine what resource is
missing?


another info, that may be help: this are my valuues for  SRM and LDU
Buffer...

= 'CP SET SRM LDUBUF 250% 225% 200%
= 'CP SET SRM STORBUF 300% 250% 200%

Any ideas ?

TIA,

Rogério Soares

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Re: UK zLUG

[Barton Robinson]

way more miles than birds.  am at ibm university in Berlin now. Was
not allowed to present though (or at least didn't want to pay 1000s of
euros to do so, but the beer and company is all good). Y'all think the
life of a performance guy is easy?

Mark Post wrote:

On 5/19/2010 at 05:22 AM, Shane G ibm-m...@tpg.com.au wrote:

Now there's a lad that gets around.
He was speaking here in Aus just a couple of weeks back.


Yes, I think Barton logs more air miles than most migratory birds.


Mark Post

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Re: open source performance monitor -uses z/VM *Monitor System Service

[Barton Robinson]

So, monitoring mainframe software is really about MANAGING, this is
not the pc world.  Does your objectives have anything to do with the
following disciplines:

1) Performance analysis including all subsystems (DASD, Storage, PAging,
CPU, Network)

2) Capacity Planning (same subsystems), with MICS, MXG, TDS interfaces?

3) Accounting , charge back for resources consumed? (100 percent capture
ratio)

4) Operations support: Let operations know about all servers having
issues with non response, filesystem full, missing processes, looping
processes, and etc...

Please contact me offline if interested in real world performance
monitoring hrequirements (or a job?)

Przemyslaw Kupisz wrote:

Hello,

I've written two programs to monitor mainframe system. They are not
completed but might be useful to somebody (for examle zpmd needs some
records and zpmc needs more graphs, statistics and some well organised
data inside frame).

Well, then some words about them:
zpmd -z/VM Performance Monitor Daemon for z/Linux running under z/VM
(actually only for v5.3). It reads data from /dev/monreader (DCSS used
by *MONITOR) and writes to MySQL database.

zpmc -z/VM Performance Monitor (Client). This is a Java client so it's
portable:-) Cooperates with MySQL database and presents system usage,
actual events.

The newest code is available to download or view using SVN repo from:
http://sourceforge.net/projects/zpmd/
http://sourceforge.net/projects/zpmc/

On balance I must finish some records in zpmd because they are still
missing. It would be nice to have somebody who knows very well HLASM and
TOD format because some records have values counted in TOD clock units
like I/O rate or total time for VMDBK. In zpmc there is a lot of work on
view and position of data to make it handy for system programmer.

--
Best regards,
Przemyslaw Kupisz

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Re: Unable to kill process

[Barton Robinson]

Any chance VMRM was active and too storage away?

Mark Perry wrote:

Hi Ron,
thats a support question if ever I heard one. Contact SAP/IBM. (Which of
course will lead to a question on maintenace levels of linux and sap.)

If kill -9 doesn't work then the process is in a system routine that can be
cancelled.
Are you saying that shutdown didn't work either and that you were forced to
crash the linux guest?
Did you have a problem with disks and/or nfs? (sap process needing to
complete i/o?)
were you alreday in shutdown?
soemtimes the order that things are shutdoiwn is very important
(users/sap/nfs/filesystem/network).

mark

On 6 April 2010 06:41, Ron Foster at Baldor-IS rfos...@baldor.com wrote:


Hello,

I just had to #CP logoff on of our production SAP systems.  It had a SAP
process on it with a process state of D  interruptible sleep.

The sap cancel options would not work.
kill would not work.
kill -9 would not work on it.

Any ideas on how to avoid having to log off next time.

Ron

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Re: ESALPS Alerts - Production Models??

[Barton Robinson]

There are many samples on the customer area of our website in:
http://velocitysoftware.com/customer/tips/index.html; beyond what is
shipped with the product.

Rodery, Floyd A Mr CIV US DISA CDB12 wrote:

I was curious if anyone is sending alerts to their enterprise monitor
using Velocity's ESALPS? Specifically alerts for production servers that
would indicate intervention in a production model? Anyone willing to
share any MONALERT samples offline?

#Floyd Rodery
DoD - DISA - DECC MECH
CDB 12 Linux on System z
717.605.8639 | 430.8639
floyd.rod...@csd.disa.mil



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Re: Poor WebLogic Performance

[Barton Robinson]

IF you have a good performance monitor, you would know exactly what
process on what server is using CPU.
With zVPS (ESALPS), on one screen, you can see ALL the top processes
across your entire Linux farm, with one PFK, you can sort them by cpu.
Knowing where your cpu is going means you can do capacity planning,
solve problems, and know when things change.

Running without a good performance monitor is is like driving a car
across the rockies without a gas gauge, you will run out of gas, you
just don't know if it will be at a good time or a bad time.

Carson, Brad wrote:

We've begun working with Oracle WebLogic running on RHEL under z/VM.  We are 
seeing very poor performance with these guests and z/VM is constantly running 
at 100% CPU when these guests are active.  It looks to us that something in any 
of our WebLogic guests is spinning on CPU.  Response time in the guest is poor 
and WebLogic response is worse.

Here are some of the particulars:
z/VM is at 5.4.0
RHEL is at 5.3
IBM Java (in the guests) is at 1.6.0
WebLogic is 10.3 (I've been told)

Any assistance in trying to get to the bottom of this issue would be greatly 
appreciated.


Brad S. Carson
Mainframe Technical Support
Laboratory Corporation of America
Phone: 336-436-8294
email: cars...@labcorp.commailto:cars...@labcorp.com
Please ignore company inserted HIPAA disclaimer below

- This e-mail and any attachments may 
contain CONFIDENTIAL information, including PROTECTED HEALTH INFORMATION. If 
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Re: Poor WebLogic Performance

[Barton Robinson]

Any idea what the utilization of the excessive thread is on an intel or
P server? If the CPU GHz requirement is similiar, then it's the z10
(and capacity issues) and you need more IFLs. If the GHz CPU requirement
is much higher on z, then it's either IBM Java or Weblogic. I've not
seen or heard of any performance studies done for weblogic.

Carson, Brad wrote:

Barton,

Well, we are using the z/VM performance Toolkit and BMC Mainview for our 
monitoring on this lpar.

This is how we were able to get down to the which guest is behaving bad
and the threads within that
guest that are giving us this heartburn.  In all cases the excessive CPU
use is coming from a WebLogic
thread using the IBM Java.


I was hoping that someone else had seen this type of issue before and might 
provide some more insight.

Our application folks keep wanting to blame z/VM and the z10 hardware
instead of looking at their code.



/Brad

-Original Message-
From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On Behalf Of Barton 
Robinson
Sent: Thursday, March 04, 2010 11:09 AM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: Poor WebLogic Performance

IF you have a good performance monitor, you would know exactly what
process on what server is using CPU.
With zVPS (ESALPS), on one screen, you can see ALL the top processes
across your entire Linux farm, with one PFK, you can sort them by cpu.
Knowing where your cpu is going means you can do capacity planning,
solve problems, and know when things change.

Running without a good performance monitor is is like driving a car
across the rockies without a gas gauge, you will run out of gas, you
just don't know if it will be at a good time or a bad time.

Carson, Brad wrote:

We've begun working with Oracle WebLogic running on RHEL under z/VM.  We are 
seeing very poor performance with these guests and z/VM is constantly running 
at 100% CPU when these guests are active.  It looks to us that something in any 
of our WebLogic guests is spinning on CPU.  Response time in the guest is poor 
and WebLogic response is worse.

Here are some of the particulars:
z/VM is at 5.4.0
RHEL is at 5.3
IBM Java (in the guests) is at 1.6.0
WebLogic is 10.3 (I've been told)

Any assistance in trying to get to the bottom of this issue would be greatly 
appreciated.


Brad S. Carson
Mainframe Technical Support
Laboratory Corporation of America
Phone: 336-436-8294
email: cars...@labcorp.commailto:cars...@labcorp.com
Please ignore company inserted HIPAA disclaimer below

- This e-mail and any attachments may 
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you are not the intended recipient, any use or disclosure of this information 
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Re: A Question on Sizing z/VM Linux Guests

[Barton Robinson]

First rule of thumb, don't guess. Since Oracle SGA can be anywhere from
a few hundred megabytes to 10's of gigabytes, you need to size the
server larger than the SGA.  If you undersize the server, you WILL have
undesirable performance.  On intel they size based on low cost of
storage and I/O avoidance so generally are too large. The SGA is usually
oversized as well - BUT the oracle DBA will need to be involved as that
is the person that can reduce the SGA size.
There are ways to measure existing storage requirements, guessing
without measurements is playing roulette (1 out of 38 you guess right?)

Carson, Brad wrote:

We have a project that is being setup to run on RHEL under z/VM.  The sizing 
parameters for the

guests (Oracle DB, and WebLogic) are being sent to us based on intel
platform sizing.  How do some
of you handle the sizing conversion from Intel to IFL's?  Are there some
rules of thumb, we should
know about?


Our environment:

IBM z10-BC (QA and Dev) and z10-EC (Prod) running z/VM 5.4 and RHEL 5.3.


Thanks for any insight.

/Brad (please ignore the company inserted HIPAA disclaimer)

- This e-mail and any attachments may 
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Re: x86 to z CPU comparison for calculating IFLs needed

[Barton Robinson]

I think you are missing several things. (And jiffies are in 10ms
increments, not 1ms increments)

First, have you verified the accuracy of your CPU numbers?  Does RHEL4
include the steal timer patch and is it working correctly on both VMWare
and z/VM? Even with current levels of Linux and z/VM, the CPU numbers
must be corrected.

2nd, what is your target peak cpu utilization for VMWare, and for z/VM?
I would expect 50% for VMWare (Being very generous i think) and 90% for
z/VM.  So z/VM, the processors get an extra 80% of CPU seconds.

3rd, It looks like you are measuring one batch process.  Real work
would have lots of processes, switching between workloads at even 1000's
of times per second.  The cache technology in the z10 will be vastly
superior, and will provide better CPU numbers when measuring an
environment closer to a production reality.

Stewart Thomas J wrote:

Need some assistance on understanding a workload comparison. Here is what we 
have:

We run a business workload (Java/WebSphere) for one week on an HP DL585 G5 
server four Quad-Core


AMD Opteron Processors, model 8389 (2.9GHz) on Red Hat Enterprise Linux
4 kernel version 2.6.9.
This is virtualized under VMware ESX.  Using /proc/$$/stat, we see that
our process id consumed
23,525 seconds of cpu time. We are basing this cpu time on the
utime/stime values (from
issuing a cat against /proc/$$/stat). Our understanding is that this is
giving us the total
jiffies consumed, and we are then dividing this by 1000 since the jiffy
timer is a millisecond.
That is how we calculated the cpu time in seconds.


We ran this same load on a System z10 EC for a week. This is a z/VM 5.3 LPAR 
with RHEL4

running as a guest. On the mainframe, we see that our process id
consumed 25,649 seconds of
cpu time.


We generated what we call an equivalence factor: 23,525 / 25,649 = 0.9172

Based on this, we believe that we'll need ~10% more z10 CPU cores to process 
our workload

than we would on our comparison platform.


Question for the audience is - are we not understanding jiffies or the 
/proc/$$/stat timers

for cpu calculation correctly? Wondering if we might be missing
something insanely obvious in
comparing cpu time (cores) in this fashion, or if this does seem
reasonable for a Java/WebSphere
workload.


For reference, we have someone in doing a TCO for our workload using 
generalized spreadsheets

for the calculations and we are using our internal comparison and the
numbers are way off for
the total estimated IFL count. For an example of what I'm talking about
here, say we have 68
x86 cores for this workload. During overlapping peak times we are
totally consuming 30 of these.
Based on our equivalence factor calculation above, we are saying that
we'll need 30 IFLs to
handle these peaks. Based on the generalized spreadsheet calculations
from those doing the TCO
they claim we can run this peak workload in 8 IFLs. So essentially my
main question from your
experiences are if our own calculations make more sense or if the
generalized spreadsheet
can/cannot be trusted for accuracy.


Any advice or experiences would be welcomed.

Tom Stewart
Mainframe OS, Networking  Security
Deere  Company Computer Center
www.johndeere.com



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Re: SLES10 - Oracle/Memory Issues (oom-killer)

[Barton Robinson]

Or even keep one minute data, 15 minute data, and/or any other
combination you would like, all at the same time.

Thomas Kern wrote:

If a customer were having a problem with a particular linux guest, could
they modify that ESALPS condensation process, say to condense after a
week? Or condense normally for all other linux guests but the problem one?

/Tom Kern

Rob van der Heij wrote:

(snipped)
We condense the 1-minute data (by default) to 15 min granularity after
a day, etc. This is probably more useful (and cheaper) for spotting
trends than having each Linux zip the files after a day or discard
them after a month.


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Re: Hugepages+oracle 10.0.2.0.4 in sles10SP2

[Barton Robinson]

Martin, please correct me if i am wrong.
Large page support supports 1mb pages - meaning consecutive 256 4k pages
in hardware. These pages are fixed, are not pageable with current
technology.  The advantage is that there is one TLB entry per megabyte
instead of one per 4k page, so that the TLB is more efficient and more
entries fit into the hardware cache, requiring less DAT translations.
To get advantage then, there would have to be 1mb of very active
programs or data packaged in that 1mb page. Operating systems could be
packaged for this with work. zTPF took advantage of this, but that
architecture is focused on performance, not virtualization.

For oracle, it would require dedicating 256 consecutive hardware pages
to an oracle database, running virtual under linux, running virtual
under z/vm - yep, quite a challenge.  In a virtual environment where we
do run many different programs - the benefit to programs and data would
be difficult to show.

The benefits of large pages are to those places that can and do measure
differences in performance at the single digit percentage difference
(zTPF). z/VM could get a little advantage with a lot of work, linux in
an LPAR as well. Linux under z/VM not. I would be surprised if the
improvement was measurable in any truly virtualized environment.

Martin Schwidefsky wrote:

On Sat, 28 Nov 2009 12:07:16 +1000
Shane ibm-m...@tpg.com.au wrote:


I missed the earlier part of this thread, but is large page support even
in z/VM ?. Alan ?.
I have a recollection that Mario Held from the Boeblingen labs said this
has been tested, but only for an LPAR install. And I'm pretty sure I
followed up on this and got the answer it's not even in V6.1.
Happy to be proved wrong.


Large page support is not available in z/VM, in particular guest
support is pretty hard to do. But the nice thing is: you don't need
guest support to reap the main benefit of large pages. There are two
benefits:
1) Less TLB entries for the same amount of addressed shared memory.
2) Reduced memory overhead for the page tables to map the shared memory.

You get TLB saving only on LPAR with the hardware support but you can
get the page table savings on z/VM with a little trick. Allocate huge
pages like you do if you have the hardware support. Then in addition
allocate a page table page to map the huge page and associate it with
the huge page. When the huge page is mapped to a process use the same
page table for all mappers. Sort of a poor man page table sharing. This
trick works on z/VM and on older machines that do not even have large
pages.


On non-s390 one of the big plusses is avoiding TLB misses. But given
that I believe z/VM also doesn't support hiperdispatch, that may not be
much of a gain on zSeries either.


I don't see the connection between TLB misses and hiperdispatch. Could
you elaborate please?

--
blue skies,
   Martin.

Reality continues to ruin my life. - Calvin.

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Re: Hugepages+oracle 10.0.2.0.4 in sles10SP2

[Barton Robinson]

Having seen a very good performance presentation from IBM on the value
of huge pages, I'm interested in knowing what value y'all expect from this?

Mark Post wrote:

On 11/27/2009 at 12:36 PM, Szefler Jakub - Hurt TP

jakub.szef...@telekomunikacja.pl wrote:

Yes :) It may be  poorly understood.
I forgot unfortunately oracle database with hugepages not available for
zlinux for now.


It should be supported.  As Damian Gallagher said in his reply, the problem 
wasn't that Oracle couldn't/wouldn't use hugepages on Linux for System z.  The 
problem was that the support for them wasn't in the Linux for System z kernel 
until recently.  Now that it is, it should work and be supported.  If it is not 
working, you should open up a problem report with your support provider.


Mark Post

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Re: RMF PM presentation from System z Expo

[Barton Robinson]

I thought IBM stopped pushing RMFPM about 5 years ago because of
overhead and lack of development interest? This was developed in the RMF
lab for installations that were z/OS, no z/VM and running Linux in an
LPAR.  Ask your boss to talk to references (for something that has been
out almost 10 years, I'm sure if it was usable, someone would be a
reference?)

Harder, Pieter wrote:

Hi,

I had a look at aroud the same time. Dropped it in favorr of Velocity's ESALPS. 
More function, less overhead. And never looked back.

Best regards,
Pieter Harder


Van: Linux on 390 Port [linux-...@vm.marist.edu] namens Ron Foster at Baldor-IS 
[rfos...@baldor.com]
Verzonden: maandag 12 oktober 2009 22:03
Aan: LINUX-390@VM.MARIST.EDU
Onderwerp: RMF PM presentation from System z Expo

Hello,

Last week my boss attended a presentation Monitoring Linux Performance
with RMF

Now he is wanting it installed and would like to evaluate it.

Way back in the 2005 and 2006 time frame we looked at it.  Primarily
based on what we found on the internet, we discontinued it's use.

I have done a little searching on the mailing list archives.  I have not
found very many good things to say about using RMF to monitor Linux.
However, most of the threads mentioning this are a few years old.

Does anyone have any comments about using RMF to monitor Linux?

Is anyone using it?

Anything we should look out for?

Thanks,
Ron

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