comparison for calculating IFLs needed
On Monday 04 January 2010 16:46, Stewart Thomas J wrote:
>/proc/sys/kernel/HZ must be a SLES thing, don't see that on RHEL. Red
>Hat folks have ideas on where to find the equivalent?
That would be /proc/sys/kernel/hz_timer
- MacK.
---
z CPU comparison for calculating IFLs needed
>>> On 1/4/2010 at 3:53 PM, Stewart Thomas J
>>> wrote:
> Regarding jiffies, we found this earlier:
> http://linux.die.net/man/7/time
> "On x86 the situation is as follows: on kernels up to and including
> 2.4.x,
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
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
If I remember correctly, what you want to do is search for "FTP client reply
code 234" on a web search engine. I think you need to break this into mmnnn,
where mm is a command code and nnn is the FTP client reply code. Most of these
are standard codes, so 234 is documented in the RFC for the AUT
The general idea is to avoid bringing your system to it's knees by starting to
many Linux systems simultaneously. This sleep breaks the startups a little bit
apart to relieve some of the pressure. A Linux boot is a fairly intensive
process compared to one sitting idle once everything has started
This is how I do it - highly recommend using SSH instead of R-anything. Makes
your security auditors happy.
//SFTPPRF1 EXEC PGM=BPXBATCH,PARM=('SH ssh -o $O1 -l $L $S $CMD')
//STDOUT DD SYSOUT=(,)
//STDERR DD SYSOUT=(,)
For each VM LPAR, I have the Linux users with SECUSER to OPERATOR. And OPERATOR
is running PROP, so all of my Linux console logs are consolidated to the one
PROP file. The cool part is that each message is prepended with a timestamp and
the userid so I can separate them. I created a Rexx log bro
Haven't tried from zLinux yet, but I've done a lot with PHP and DB2 on z/OS.
Good Redbook that might give some additional pointers if you haven't seen it:
http://www.redbooks.ibm.com/abstracts/sg247218.html?Open
There are also several flavors of drivers like ibm_db2, PDO_IBM/PDO_ODBC, and
Unifi
A z10 processor has 4 cores, but each IFL/ZIIP/ZAAP/GP is really only one of
those cores. So licensing for an IFL should count as one Oracle license (1
core). One other thing you'll find is that they have a multiplier depending on
the core type/speed. I think the multiplier for z hardware is 100
I don't see that type of option on the mount command man pages for z/OS Unix.
Same as with FTP, it would also require "smarts" for translating (or not) if
the option did (does) exist.
-Original Message-
From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On Behalf Of Mark Post
Sent:
Haven't tried SUSE, but did try z/VM install via FTP from z/OS Unix filesystem.
Couldn't get it to work - don't remember the exact issues. Ended up just
installing an FTP server on my PC and installing from that. There are lots of
free ones. Saved me a few steps and time in the long run.
Just
We "rolled our own" recovery Linux system (aka "virtual live cd"). We simply
created a guest with a minimal Linux install and no LVM. Then via the beauty of
shared disk, if a system fails we just shut down the failed guest and link our
recovery system's disk to the guest as well. We IPL from th
We put our kickstart on an HTTP server and not an FTP server, so we do this:
KS=http://abc.myserver.com/Public/kickstart/ks-linux123.cfg
RUNKS=1
Then in the actual kickstart we have this parm to point to the FTP install
files:
url --url ftp://123.456.789.123/s390x/AS4u6
Maybe you can do it all
I think DIRMAINT satellite support might require RSCS, which needs a license
($$$)...? Could be wrong, but I believe that was my impression when I looked
at it.
-Original Message-
From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On Behalf Of David
Boyes
Sent: Thursday, June 04,
We do synchronization of password changes for a subset of our users using some
home grown exits. If a user is in a particular "VM" RACF group on z/OS, the
exit kicks off a z/OS batch job step that essentially does a remote call to
each of our z/VM systems to invoke a script to make the password
On my RHEL4 system, I use cat /proc/sysinfo and it indicates the LPAR name and
guest name.
-Original Message-
From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On Behalf Of Bernie Wu
Sent: Thursday, February 19, 2009 9:09 AM
To: LINUX-390@VM.MARIST.EDU
Subject: How to determine
k on z/VM 5.3, maybe 12-18 months ago.
-Original Message-
From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On Behalf Of Adam
Thornton
Sent: Wednesday, February 18, 2009 10:12 AM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: Size of Linux DASD under Z/VM?
On Feb 18, 2009, at 10:02
I've heard several people mention using EDEV with FCP. We tested FCP and EDEV
was simple to set up and get working. Giving it to Linux seemed like it took a
bit more work. We had an IBM consultant come in and told us to never use EDEV
for Linux guests. Is anyone using EDEV FBA in production toda
We drive a lot of CMS/CP commands and Rexx scripts from Linux. I use the
following:
http://www.vm.ibm.com/download/packages/descript.cgi?LXCMS
This is a client/server package that allows you to set up one or more userids
on z/VM to process commands from a Linux machine. The neat part that I fou
Here are my setup steps for SSH keys if they help.
SSH Login Without Password
One of the neat features of SSH is the ability to exchange keys between
servers for authentication without a password prompt. To set this up, do the
following:
1. Use putty to SSH into the server you want
Sounds a little like our Red Hat rep who told our Linux guys yesterday that IBM
is likely to get rid of z/VM in favor of KVM, because "why would IBM want to
support multiple virtualization platforms". This kind of misinformation from
reps at these vendors sure make it hard to sell mainframe Lin
With more recent versions of DB2, a TCP/IP based listener is built right in, if
configured by your DB2 admins. I can do a netstat on our z/OS system and all of
the DB2 for z/OS subsystems are listening on some ports we defined. I can
connect directly to DB2 from say, a WebSphere server on Linux
I don't have experience from Linux, but PHP on z/OS has a DB2 driver. Just
wanted to make sure you knew that. So you could do your PHP-ing on z/OS (if
feasible) or an ugly solution might be to do a PHP to PHP call from Linux to
z/OS. Although I'm guessing there is some kind of driver to remotely
I don't know that these are free, but for reference we did research this some
time ago and I still had these in my notes:
... but I was looking into it at one point and jcraft was one on my list I
remember:
http://www.jcraft.com
Another appears to be http://www.jscape.com (google search).
Th
D] On Behalf Of Mark Post
Sent: Thursday, October 09, 2008 5:37 PM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: SFTP running batch - using no password.
>>> On 10/9/2008 at 6:14 PM, in message
<[EMAIL PROTECTED]>, Stewart Thomas J <[EMAIL PROTECTED]> wrote:
-snip-
> Generally you&
How did you set up your keys? To run sftp in batch you have to either set up
keys or wrap your sftp processing in some kind of Expect script, either using
expect in Linux or something like the Perl Expect module. Generally you'd want
to use a key exchange setup, unless the client/server user acc
If this helps, here is how I have mine mounted:
>From our RHEL server named ldxzvm03 in /etc/fstab:
hiper-cpur:/hfs/u/abcdef,binary/sftp/abcdef/center3 nfs rw,hard,intr 0 0
hiper-cpur is the Hipersocket IP of a z/OS LPAR.
On the z/OS side, we have the following defined in the NFS export
For reference, these are what you'll be looking for in your od output:
CRLF - Carriage Return Line Feed (ASCII x'0D0A', escape sequence '\n'). Used on
Windows (DOS) platforms.
CR- Carriage Return (ASCII x'0D', escape sequence '\r'). Early Mac, before
it became Unix based.
LF - Line Feed
Best way to be equitable is via usage based charging, ala cell phone billing.
First goal is to get a figure for the total costs that you want to recover from
all your customers and over what period. Let's say it's 100 dollars over 1 year.
Then you figure out some categories to charge back for. C
I struggled with this too. The full-pack disks for Linux write out a
semi-standard VTOC that z/OS understands so it can see the various partitions
as data sets that it can backup individually. If the minidisk starts anywhere
other than cyl 0, Linux will put a VTOC there but it isn't in the right
If you have some skills on your hands or maybe a girl scout troop looking for
some badges and some time to volunteer, you could "roll your own":
http://www.free-penguin.org/
__
Tom Stewart
Infrastructure Analyst
John Deere - z/OS Support Services
em: [EMAIL PROTE
Agree with the comments for #1/#3, but get where Mike is coming from. I've had
a couple "early mornings" when we are on the phone with the Linux and z/VM
groups trying to figure out why a server won't come up. As the z/VM person,
lots of times I'm providing them console logs and such with the er
rest to the shops that do have a VM
systems programmer.
As a consultant, each place I go to, is entirely different from most other
shops that I've been to.
Tom Duerbusch
THD Consulting
Law of Cat Acceleration
A cat will accelerate at a constant rate, until he gets good and
ready t
Just wanted to add to this - I'm also a z/OS person turn z/VM person. Yeah
these are two different OS'es but the z/OS maintenance/upgrade is so easy
sometimes when the OS is just on a few disk volumes and you take the LPAR down,
point to the new sysres, and bring it back up. To back off, you do
We use a couple ways. The rich man's way is to use a job scheduler with agents
that can run on Linux and be notified.
The poor man's way is to use SSH between z/OS and Linux. In one case I have a
batch job that runs on the mainframe that puts a file on an NFS mount to Linux
in step #1. Then in
I don't know about Suse, but with Red Hat (RHEL4) LDAP support comes
configured with PHP. I'm doing lookups to an LDAP server and didn't
do anything special to set it up.
Try setting up a small PHP page to
do a phpinfo() function and then look through the output of that.
For example mine shows --w
We run RHEL on z because that is what we run on Intel. It was easier for our
Linux admins to know just one distro, and we can reuse a lot of the same
processes and Red Hat features across the platforms. Sometimes it bites us
when certain product vendors only support Suse on z, or when there is
We are looking at moving our WebSphere workload from z/OS to Linux. We have
lots of 4way x86 Linux boxes running WebSphere - each instance capable of
running dozens (nearly 100 in some cases) of application servers (JVMs) with
many GB of memory. On WebSphere for z/OS, an LPAR might have 32 appl
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