Re: Best stealing explanation for z/Linux under z/VM

In fact it was easy, it is right here at Velocity: http://www.velocitysoftware.com/VMSTEAL.PDF Van: Harder, Pieter Verzonden: donderdag 21 januari 2021 17:41 Aan: Linux on 390 Port Onderwerp: Re: Best stealing explanation for z/Linux under z/VM I remember

Re: Best stealing explanation for z/Linux under z/VM

I remember vaguely that long ago there was a paper by Rob vd Heij on steal time. You will have to search for it. No idea if it is still available on the list. best regards, Pieter Harder Van: Linux on 390 Port namens Victor Echavarry Verzonden:

Re: zLinux authentication on windows AD LDAP

NetBIOS/LAN Manager systems do you still have? They’re about the only thing I can think of that would still care about the old way. Anything post-Win9x with service packs should be able to do the Kerberos stuff. > On Mar 31, 2019, at 6:15 PM, Harder, Pieter > wrote: > > Not if you

Re: zLinux authentication on windows AD LDAP

Not if you AD is still running in NTLM mode. Van: Linux on 390 Port namens David Boyes Verzonden: zondag 31 maart 2019 20:43 Aan: LINUX-390@VM.MARIST.EDU Onderwerp: Re: zLinux authentication on windows AD LDAP > Is it technically possible to

Re: Examples of tape access

Van: Harder, Pieter Verzonden: dinsdag 22 januari 2019 23:40 Aan: Linux on 390 Port Onderwerp: Re: Examples of tape access Long ago, in a different galaxy I had Ficon tapes library-mounted for Linux guest through a companion CMS server (hello WAKEP!!) that did the DFSMS stuff. Crude

Re: Examples of tape access

Long ago, in a different galaxy I had Ficon tapes library-mounted for Linux guest through a companion CMS server (hello WAKEP!!) that did the DFSMS stuff. Crude, but it worked. best regards Pieter Harder (still daily comparing VMWare ESX with z/VM and finding it lacking...)

Re: I checked that it's not April 1

In the past IBM has been extremely reluctant to outright own a Linux distro. Likely for fear of alienating the Linux people by corporate behaviour. Why now? Is this a preventive strike to prevent somebody else from owning Red Hat? Microsoft seems to be on the prowl to buy open source stuff and

Re: Diagnose high wait

Just to give an extreme example from another time, another galaxy. I had a z9-BC (I told you, long ago) with TSM Linux VM (Tivoli Storage Manager, the backup thingy) that moved data for replication purposes from a TS3500 to a TS3310 with six tape pairs. Reached almost 1 GB/s with very little

Re: linux memory

I think this practice of allocating 8G/8G has come from the virtualised Windows world. There you need at least 8GB of memory to run the Windows server independent from what you run on it. A 10k service module or an 8G (virtual) SAP system. Yes, smallish SAP systems are quite good at living in

Re: TCO comparison Intel vs EC12 IFLs

ged database which may have HUGE impact on performance. 03-02-2016 01:28:09 "Harder, Pieter" wrote: >In fact the disk system didn't change with our migration. The VMWare farm was >run against the same IBM DS8000 the z used. Most of the DS8000 space was used >for open syst

Re: TCO comparison Intel vs EC12 IFLs

EDU> namens Philipp Kern <pk...@debian.org> Verzonden: dinsdag 2 februari 2016 22:24 Aan: LINUX-390@VM.MARIST.EDU Onderwerp: Re: TCO comparison Intel vs EC12 IFLs On 2016-02-02 14:54, Harder, Pieter wrote: > I think there is another factor involved. On x86 you usually run > da

Re: TCO comparison Intel vs EC12 IFLs

Hi, I think there is another factor involved. On x86 you usually run database engines etc with very large caches to avoid going to disk. On z this is much less of a penalty because of the powerful I/O subsystem. I have some experience with this as we moved our SAP systems from z to x86 as part

Re: Issues using VMUR

David, I remember from long ago that CMS NETDATA (not the TSO version) was documented in the CMS manuals. I short search reveals it to be in the 620 CMS Macros and Functions Reference. best regards, Pieter Harder Van: Linux on 390 Port

Re: Oracle in virtual environments

Hi Berry, Yes, this policy of non-support of Oracle on virtual systems applies to VMware as well. That is why we still run our main Oracle on Sparc iron. Political trouble ahead ;-) Best regards, Pieter Harder pieter.har...@brabantwater.nl tel +31-73-6837133 / +31-6-47272537

Re: Oracle in virtual environments

The whole balance is different on a z. There often just doing the I/O (especially when you can do lots of them at the *same* time, thus overlapping them in time) is faster than rummaging around in bufferspace. My experience in the past has been that on z database engines need an order of

Re: z/VM Switch performance

Hi, I am not a current S/390 customer, but when I was I spent quite some time together with Rob vd Heij analysing VSwitch performance and the workings of the virtualised instructions (none of them published by IBM) that go with them. At that time (z/VM 5.3 ish) those instructions needed to

Re: Enumerating LUNs on DS8100

Mauro, If you are running on z/VM there is an equivalent CMS based tool called SCSIDISC. It is in the CMS maintenance tree and takes some renaming/copying of components to activate. I found SCSIDISC easier to use than the equivalent Linux based tools (if and when available). Best regards,

Re: Enumerating LUNs on DS8100 (SOLVED)

Pieter, I've installed SCSIDISC here, but it could't find anything, so we turned to Linux again. You need to attach the FCP device(s) you have attached to the Linux guest to the CMS running SCSIDISC. So: 1. shutdown and logoff owning Linux, freeing devices 2. attach same devices to CMS 3. run

Re: Linux backups and restores to/from tape

Just a remark. TSM does *not* have a tape requirement. You can have a disk only installation just fine. Do your first level backups to what your standard disk for Linux uses. Then migrate to some cheap outside storage and have that mirrored to a secondary location. My experience is that the

Re: MONDCSS after IPL

SAVESEG MONDCSS? Van: Linux on 390 Port [LINUX-390@VM.MARIST.EDU] namens Dean, David (I/S) [david_d...@bcbst.com] Verzonden: maandag 6 juni 2011 20:53 Aan: LINUX-390@VM.MARIST.EDU Onderwerp: MONDCSS after IPL How do you make MONDCSS permanent? We IPL'd,

Re: HCPGIR450W and HCPGIR453W after editing user direct

Can you describe in more detail what you exactly did? I hope you are talking about manually changing a monolithic source directory and not parts of a segmented directory on DIRMAINT disks? If the latter that won't work and there is a fair chance you clobbered your directory. In that case I hope

Re: Support thru IBM?

Yes, you can (at least for Suse I have done so). You illogically have to follow the z/OS tree and Linux is linked in as a z/OS subproduct. Van: Linux on 390 Port [linux-...@vm.marist.edu] namens Bauer, Bobby (NIH/CIT) [E] [baue...@mail.nih.gov]

Re: zVM updated, VLAN dead

Just a guess, maybe you don't have VM64604 on your 540 system? And it is probably integrated in 610. That one could change the native vlan without any sound. I was hit by that one when I applied it. Best regards, Pieter Harder pieter.har...@brabantwater.nl tel +31-73-6837133 / +31-6-47272537

Re: Virtualization with the Best TCO?

It is is not Intel, then it does not exist. How many Linux people (general population) consider Linux on the z, i, or p? Unless you came up in the z, i, or p world, those processors simply do not exist. computer is identically equal to Intel processor. Then why are you talking about Linux? You

Re: iucvconn with invalid DNS in target server problem

Hi, Wouldn't 'UseDNS no' in /etc/ssh/sshd_config do it? Best regards, Pieter Harder pieter.har...@brabantwater.nl tel +31-73-6837133 / +31-6-47272537 -Oorspronkelijk bericht- Van: Linux on 390 Port [mailto:linux-...@vm.marist.edu] Namens Agblad Tore Verzonden: dinsdag 3 augustus 2010

Re: IFL's, VM, and Linux

The CPU's in the user directory are virtual ones, not related to real CPU's in any way. Best regards, Pieter Harder pieter.har...@brabantwater.nl tel +31-73-6837133 / +31-6-47272537 -Oorspronkelijk bericht- Van: Linux on 390 Port [mailto:linux-...@vm.marist.edu] Namens Sam Bass

Re: IBM zEnterprise System announced???

Not the webcast, reading the Redbooks. Best regards, Pieter Harder pieter.har...@brabantwater.nl tel +31-73-6837133 / +31-6-47272537 -Oorspronkelijk bericht- Van: Linux on 390 Port [mailto:linux-...@vm.marist.edu] Namens Marcy Cortes Verzonden: donderdag 22 juli 2010 17:37 Aan:

Re: Error bringing NIC 0800 online

Shouldn't that be LAYER2=1 in your conf? Best regards, Pieter Harder pieter.har...@brabantwater.nl tel +31-73-6837133 / +31-6-47272537 -Oorspronkelijk bericht- Van: Linux on 390 Port [mailto:linux-...@vm.marist.edu] Namens Bauer, Bobby (NIH/CIT) [E] Verzonden: maandag 14 juni 2010

Re: TSM memory requirements

Hi Ruddy, I am running TSM V6.1 on a z9 with 2 IFL's. The production TSM runs with a Vsize of 5GB. This one is moving a backup load of ~ 8TB a day and is rather maxed out. Most of the LPAR is running SAP and that takes up most of the real memory of 23GB with 1GB expanded. Another tip: do

Re: question on extending an lvg

You added packs. Nervous twitch: mkinitrd and zipl? I think you can do the filsystem stuff with yast as well, by increasing the lv. Van: Linux on 390 Port [linux-...@vm.marist.edu] namens LJ Mace [ljmace1...@yahoo.com] Verzonden: woensdag 2 juni 2010

Re: z/VM and z/OS sharing OSAs?

I don't know about z10 (don't have one), but we run with two OSA 1000BaseT as a failover pair shared between two z/OS and one z/VM/IFL lpars. The outside is one /24 network and we gave out individual host addresses and use a VSWITCH with two RDEVs on the z/VM side as well. The OSAs keep track

Re: z/VM and z/OS sharing OSAs?

I don't know a thing about the Cisco switch, but I have 3 LPARs, 1 z/VM and 2 z/OS, sharing the same OSA Express-3 port. Since they are on the same port they are obviously on the same subnet. That is not necessarily true if you take vlan tagging into account. One physical port may then

Re: DB2 Connect keeps the guest active

Are you sure you're doing the right thing there? It sounds like you've started a database instance rather than DB2 Connect. Eh Rob, DB2 Connect fat client contains a database instance. You are thinking thin client. Best regards, Pieter Harder pieter.har...@brabantwater.nl tel

Re: Sizing Linux Guests on z/VM

Hi Billy, My rule-of-very-big-thumb: one third of the vendor specified amount for x86. My experience being with SAP and TSM. Both end up in the same area with us. Best regards, Pieter Harder pieter.har...@brabantwater.nl tel +31-73-6837133 / +31-6-47272537 -Oorspronkelijk bericht-

Re: DS8300, NPIV, setup...

Folks, We currently have our FCP attached storage to our DS8300 running thru SVC. No NPIV. We are trying to set up now to be Native DS8300 using NPIV. We have a lun attached (actually 4 on on image and 1 on another ) which seem to be working but our storage admin is NOT seeing the images

Re: DS8300, NPIV, setup...

Yes, I had the same situation running release 3 code. The NPIV WWPNs were logged, or they wouldn't have been usable. But the DS8300 admin UI (and CLI, for that matter) showed them as not logged in. Move to release 4 solved that for us, as promised (I had previously opened a pmh about this)

Re: FCP Direct connect vs. SAN fabric...

I suspect the main reason is that a big part of NPIV is implemented by zoning in the switch. So without switch it is rather difficult to control who whacks what. Not a very good idea in a production environment. Best regards, Pieter Harder pieter.har...@brabantwater.nl tel +31-73-6837133 /

Re: How to tell what logical volume is called dm-7

pvscan? Best regards, Pieter Harder pieter.har...@brabantwater.nl tel +31-73-6837133 / +31-6-47272537 -Oorspronkelijk bericht- Van: Linux on 390 Port [mailto:linux-...@vm.marist.edu] Namens Ron Foster at Baldor-IS Verzonden: woensdag 24 februari 2010 15:15 Aan: LINUX-390@VM.MARIST.EDU

Re: How to tell what logical volume is called dm-7

lvdisplay -m /dev/VG name/LV name will display the physical volumes and extents for a logical volume. Pvscan will tell what physical volumes belongs to what volume group, if any. Lvscan will tell what logical volumes are defined. Best regards, Pieter Harder pieter.har...@brabantwater.nl tel

Re: Location of network configuration

Seems some operational hiccup if you got the configs right. What does lsqeth tell you about the state of the nics? Best regards, Pieter Harder Van: Linux on 390 Port [linux-...@vm.marist.edu] namens van Sleeuwen, Berry [berry.vansleeu...@atosorigin.com]

Re: Oops message in /var/log/messages

Never seen it. I am running both SAP 640 and 701 on Linux SAP005 2.6.16.60-0.54.5-default. Best regards, Pieter Harder pieter.har...@brabantwater.nl tel +31-73-6837133 / +31-6-47272537 -Oorspronkelijk bericht- Van: Linux on 390 Port [mailto:linux-...@vm.marist.edu] Namens Ron Foster

Re: LUN numbers for DS8000

This is a lun on my installation: 0x40124000 The lun number in the Storage Admin is 1200 So that conforms exactly to x'40ab40cd' If you can't see it, it is most likely zoning in the SAN switch. Have the person who is responsible for that look into i. Best regards, Pieter Harder

Re: LUN numbers for DS8000

ON z/VM 540 @ RSU0902: SCSIDISC LOG A INFO::START @ 15 Dec 2009 18:53:55 INFO::No of attached FCP Channels found=1 INFO::Choosen FCP Sub-Channel Device(s)=ALL DEVICES INFO::FCP SUB-CHANNEL 401F Initialized INFO::For Sub Channel 401F No of WWPNs found=1 INFO::For 401F Choosen

Re: WWBD - One large VM LPAR or multiple smaller ones?

I think there is a more z/VM related issue: master-only work. One lpar obviously has one master. By the time you get to the large lpars contemplated for this thread contention for the master may become a problem. But then I have no real knowledge of this. Probably more something for Barton and

Re: EDEVICE or Direct LUN

When that happens you are either: 1. Not using NPIV, and thus suffering the consequences. 2. Or should immediately take your storage admins to the woodshed for giving out unwarranted access rights. Regarding 1, Rob's statement was correct because NPIV cannot be used when point-to-point. I

Re: OSA-Express3 10 Gb, Vswitch, and SLES10 Linux Throughput

Hi Craig and Ron, I am the customer that Rob's case study was based on. I had the exact same problem (with 1 GbE OSA's) that you are having. Your problem is indeed the VSWITCH. Kick it and use native bonding in Linux. If you need more than one guest, buy more OSA's, they are way cheaper than

Re: OSA-Express3 10 Gb, Vswitch, and SLES10 Linux Throughput

For the finer points of performance measurement I defer to Rob. This is a highlevel coarse view: With a VSWITCH with LACP involved and using two full IFL's with 4 OSA GbE I could barely exceed 100 MB/s with no other activity at all. With the same 2 IFL's and 4 OSA dedicated and bonded within

FW: OSA-Express3 10 Gb, Vswitch, and SLES10 Linux Throughput

...@brabantwater.nl tel +31-73-6837133 / +31-6-47272537 Van: Craig Collins [mailto:grizl...@gmail.com] Verzonden: maandag 26 oktober 2009 20:58 Aan: Harder, Pieter Onderwerp: OSA-Express3 10 Gb, Vswitch, and SLES10 Linux Throughput Hi Pieter, Thanks for your response. We've never tried connecting them directly

Re: OSA-Express3 10 Gb, Vswitch, and SLES10 Linux Throughput

Do you have statistics for packets on each interface in the port group? When I had the VSWITCH setup I was looking closely into this. While not perfectly balanced due to our client distribution, there was reasonable traffic going on on all interfaces. And it was the processor power available.

Re: OSA-Express3 10 Gb, Vswitch, and SLES10 Linux Throughput

A sadly realistic checkpoint, though: You are unlikely to EVER get an appreciable percentage of wire speed out of the 10G interfaces using TSM no matter what you do; the protocol is half duplex in a lot of places which kills the interface data pipelining. If you can get it to exceed 15-20% of

Re: RMF PM presentation from System z Expo

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

Re: lin_tape driver

Does anyone know if there is a supported version of the lin_tape Linux device driver for SUSE LINUX 10 SP2? The file lin_tape_359X_zSeries.ReadMe on ftp.software.ibm.com/storage/devdrvr/Linux only shows support up to SP1, kernel 2.6.16.46-0.12. Yes, go one step deeper:

Re: Dasd_diag_mod question

There will be plenty of us reminding you on this post when you found something happened to the order of your disks in the virtual machine configuration and the mkswap wiped out your root file system or some other relevant data... That shouldn't happen if you are using udev to address them

Re: FW: Rules of Thumb

I agree that the speed of CPU is not the problem anymore. But do you want CPU intensive load? Afaik the CPU in mainframe, even z10, is still more expensive than an intel. So if you'd have CPU intensive loads, would it be still cost effective to run on z? Do we still need to stay away from these

Re: How to activate 2nd nic

Hi Berry, You did provide /etc/sysconfig/hardware for the second nic? If not the /etc/sysconfig/network doesn't kick in as the hardware is not picked up. Best regards, Pieter Harder pieter.har...@brabantwater.nl tel +31-73-6837133 / +31-6-47272537 -Oorspronkelijk bericht- Van: Linux

Re: How to activate 2nd nic

-...@vm.marist.edu] On Behalf Of Harder, Pieter Sent: woensdag 17 juni 2009 13:29 To: LINUX-390@VM.MARIST.EDU Subject: Re: How to activate 2nd nic Hi Berry, You did provide /etc/sysconfig/hardware for the second nic? If not the /etc/sysconfig/network doesn't kick in as the hardware is not picked up

Re: How to activate 2nd nic

. Regards, Berry. -Original Message- From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On Behalf Of Harder, Pieter Sent: woensdag 17 juni 2009 14:04 To: LINUX-390@VM.MARIST.EDU Subject: Re: How to activate 2nd nic Hi Berry, After providing the hardware definition you need to either

Re: How to activate 2nd nic

I think it is not a layer2/3 issue. When that is wrong the nic will get an error on activation, but the devices will come online. This sounds more like some hangup in udev for the basic device. Best regards, Pieter Harder pieter.har...@brabantwater.nl tel +31-73-6837133 / +31-6-47272537

Re: Any idea? Dirmaint error by detach 123 disk(540RES)

Hi, If you didn't touch the config then simply forcing and xautologging dirmaint will probably fix it. I you deleted the definition of minidisk 123 from the dirmaint directory entry, or the definition that may point to (eg maint 123) things get more complicated. If so come back to the

Re: channel bonding using 2 Vswitches

Hi Paul, So we'll keep checking and also thanks for the VSS info we had looked at that in the past and for some reason it was dropped to we will review that one again too. One pitfall to think about I ran into with VSS the hard way is that VSS operates according to the 'same box' principle.

Re: channel bonding using 2 Vswitches

1. We found that when you add OSAs to a Vswitch and setup link aggregation that the OSAs is used only on that Vswitch. That is by definition. Setting up layer2 LACP requires exclusivity for the OSA chpid. 2. When you setup port channeling in the Real Switch you must be reading

Re: Cpuplugd-setting CPU_MIN to 1

With Linux on z/VM I do like the idea that reduced number of CPUs may improve chances of the virtual machine drop from queue nicely. But recent SAP releases have stuff that makes even the virtual 1-way stay in-queue, so there it does not help anymore. And now for the really stupid question: does

Re: What WWPN do we use

Hi Jan, How and where do we get that WWPN Our storage guys do not understand our question Storage guys that do not know what wwpn's are? Get new storage guys ;-)) Seriously, to start with basics: - is your switch a Fibre channel switch and not a Ficon-only one? - do they have fibre ports on the

Re: What WWPN do we use

Then we have to add the WWPN to to device We are not sure what WWPN to use On the switch or on the SAN itself And how do we get to the WWPN to display (In other words where do we find it) If you are running on z/VM there is a tool called SCSIDISC. It is on the CP object disk. With that you scan

Re: VM-FCP connections

Hello Martha, You don't seem t have gotten many replies, so let me try. However, I'm planning on making use of this on a z9 for our production Linux guests who need access to large data volumes (i.e. our Oracle servers, etc.). I am not using edev but native FCP/NPIV. I have looked at edev in

Re: TSM Server on Linux on Z Anyone?

Hi Lee, Is anyone running a TSM server (not client) on Linux on Z? Any observations? Yes, we are. Using a DS8300 for disk storage, a TS3500/LTO3 for primary tape pools and a TS3310/LOT4 for copy pools and a 4x GbE LACP OSA bundle. It is a completely automated environment with the two tape

Re: TSM Server on Linux on Z Anyone?

Hi John, We are considering Linux on z9, and I noticed you mentioning the overhead of VSWITCH LACP - which we are planning to use. Do you have some detailed information on this overhead? Is it affected by SET PORT GROUP INTERVAL ? Any information would be gratefully received:-) The problem

Re: HCPLNM091

Have you checked the system vdisk limit? The help for HCPLNM091E states this is a failure of either the user or system limit. And if you in fact exceeded the system limit make sure you have the paging space to increase the system limit or this could get very painfull indeed. Best regards,

Re: Dedicated Ficon adapters

We've figured out how to setup a SAN and make it available to one of our zLinux guest. The Ficon adapter was attached to the linux guest first with an ATTACH command and now with a DEDICATE statement in user direct. That says to me I can't use that Ficon adapter for any other guest that I may

Re: vswitch for everyone

I'm wondering if something like this would be a reasonable option for people with less requirements than RACF/VM. It could even read the directory source to get all passwords in, but maybe the separation of the two is even a good thing. It could free VM development from some of the dual-path

Re: z/VM and z/Linux Performance Monitoring

Nelson wrote: We are setting up an SLES 10 SP2 Linux environment running under z/VM 5.4. We have not determined what performance monitoring tool to use yet. What tools are other shops using for performance monitoring? Thanks. I have both ESALPS and VM PTK. I prefer ESALPS for Linux

Re: NPIV through Cisco 9513

How do then zone them so that the guest can see them You don't need to have them zoned to define them within Linux. You only need to have them zoned in the switch to use them. The storage people say that they have to see the wwwpn before they can zone it That is not true. But they have to do

Re: vswitch for everyone

That would be my desire as well, but IBM says it is what it is for security reasons. I agree with them. Paranoia maybe, but better safe than sorry. just a way to grant * or grant all. The way it is now is such a pain. Exactly why I suggested 'grant public' in a previous post. But your

Re: IBMtape drivers and scsi tapes

Hi Marcy, If you are using the lin_tape driver and udev you can use static naming by using /dev/lin_tape/by-id/wwpn-IBMtape. I am not quite sure about the old IBMtape driver, but if you are using that one it is about time to move to lin_tape anyway. Best regards, Pieter Harder

Re: vswitch for everyone

Does anybody know is it possible to create vswitch which will be unaware to access permissions, so every guest can connect to it and I don't need to run modify vswitch grant access every time? I don't think so. Anyway I don't think you want a vswitch that is access permission unaware. More

Re: Hipersockets on Redhat

What does lsqeth tell you? What do you have in /etc/sysconfig/hardware? Mine is hwcfg-hsi-bus-ccw-0.0 CCW_CHAN_IDS='0.0.0c03 0.0.0c04 0.0.0c05' CCW_CHAN_MODE='' CCW_CHAN_NUM='3' LCS_LANCMD_TIMEOUT='' MODULE='qeth' MODULE_OPTIONS='' QETH_IPA_TAKEOVER='0' QETH_LAYER2_SUPPORT='0' QETH_OPTIONS=''

Re: Excessive time for login

We are running SUSE SLES 10 SP 2. When we login to the server via SSH, our pam module that validates the userid against Active Directory completes with a successful logon (as seen on the syslog), but it is some 40-50 seconds before we see the logon prompt to the user. Can anyone suggest a

Re: Resetting z/VM admin password

I guess I was too shocked by the idea of letting others tamper with the directory that I was looking more into recovery from things much worse than this... And right you are. I wouldn't even trust myself manipulating the directory by hand. Too much scope for silly mistakes ;-) Best regards,

Re: VSWITCH - OSA-Ports connected different physical switches

The 6500s have a feature called Virtual Switching System (VSS) 1440 that allows multiple switches to appear as one. (Btw, IEEE 802.3ad requires awareness of what's going on on all the links. This isn't a limitation of the VSWITCH.) We operate in that way and found a major drawback: The physical

Re: Size of Linux DASD under Z/VM?

We're new to the Linux world. Currently we have 3390 Mod-3 (2.8G) and Mod-9s (8.4 G) defined to our Linux guests under Z/VM. On ECKD, same as you mod-3 and mod-9. On FCP terabyte sized luns. What I'd like to know from the group is - What are your DASD sizes? Are the complaints about

Re: Checking for tape drives within a script

Cat /proc/scsi/IBMtape? Best regards, Pieter Harder pieter.har...@brabantwater.nl tel +31-73-6837133 / +31-6-47272537 -Oorspronkelijk bericht- Van: Linux on 390 Port [mailto:linux-...@vm.marist.edu] Namens Lee, Gary D. Verzonden: woensdag 11 februari 2009 17:07 Aan:

Re: LINUX-390 Digest - 6 Feb 2009 to 7 Feb 2009 (#2009-37)

Well, the battle is over, and guess what, FBA won. SCSI/SAS/SATA is basically all FBA. Wonder what would have happened if IBM hat shut up Poughkeepsie. Would the world have moved off mainframes in the way it has? Best regards, Pieter Harder pieter.har...@brabantwater.nl tel +31-73-6837133

Re: Philosophical question...

Depending upon what distro you are using, your package manager may allow you to have both the old and the new version of the package installed at the same time. If the package is a set of libraries with suffixes, then that might be sufficient. With RPM-based distros, you tell RPM to install the

Re: Philosophical question...

Upgrading a system to current level. Have a vendor product that insists on the installation of a backlevel component application that causes the configuration and service management system to report errors in the configuration. Vendor insists that the backlevel component is the only way, but the

Re: Zfcp initialization troubles I think

If you have no other means of discovery, there is a CMS based tool called SCSDISC. On my system it is located on the CP sample disk and needs some renaming before use. See the part named SCSIDISC SAMPHELP for instructions. You attach the FCP device to your CMS user and run it. If there is

Re: bonding multiple qeth vnics to vswitch?

This presentation, given at the SHARE Orlando meeting last February, might be of interest: Networking with Linux(r) on System z, session 9267, given by Steffen Thoss (th...@de.ibm.com). He discusses network bonding of multiple NICs in some detail, and gives example configurations for SLES 10.

Re: bonding multiple qeth vnics to vswitch?

Also the current level of the bonding driver precludes real balancing of outgoing data over the nics. This part I don't agree with. One trap I almost fell into was just looking at the raw numbers of bytes transmitted for each interface. Then I realized that a fair amount of traffic flows

Re: bonding multiple qeth vnics to vswitch?

The guest-facing side of the VSWITCH does not support LACP. (Let's avoid terms like port side and trunk side. When a guest is using a virtual trunk, which side is the trunk side?) LACP is the thing that lets the host and switch coordinate traffic. Ok, that's a better terminology, guest-facing

Re: bonding multiple qeth vnics to vswitch?

For comparison have a look at cp q nic details and note the difference between Adapter MAC and Unicast MAC Anyway, I have set up a production test for tonight that will transfer on the order of 2-3 TB with about 100 clients. We'll see what will happen there both balance and performance

Re: bonding multiple qeth vnics to vswitch?

A mystery indeed. As Pieter suggested, seeing the output of QUERY NIC DETAILS would be edifying. Here is the answer on my system: TSMSERV:~ # vmcp q nic details Adapter 0C00.P00 Type: QDIO Name: 0 Devices: 3 MAC: 02-00-00-02-03-96 VSWITCH: SYSTEM QDIOL RX Packets:

bonding multiple qeth vnics to vswitch?

Hello list, I have been reading in 'Networking with Linux on System z' from Share in last August (see http://linuxvm.org/Present/SHARE111/S9267kw.pdf) and I see something that is confusing me. In the part about qeth bonding on page 33 it says 'Add MAC address to eth0 eth1 (not necessary for

Re: bonding multiple qeth vnics to vswitch?

Hello list, I have been reading in 'Networking with Linux on System z' from Share in last August (see http://linuxvm.org/Present/SHARE111/S9267kw.pdf) and I see something that is confusing me. In the part about qeth bonding on page 33 it says 'Add MAC address to eth0 eth1 (not necessary for

Re: bonding multiple qeth vnics to vswitch?

why would you want to channel bond two vnics going to the SAME vswitch? Chances of a software vnic failure are pretty remote, and may affect all vnics anyway. I can see bonding two vnics coupled to two vswitches. To me it is not a failover issue, but a capacity issue. Eg. with two vnics you

Re: bonding multiple qeth vnics to vswitch?

On 1/22/2009 at 4:21 PM, Marcy Cortes marcy.d.cor...@wellsfargo.com wrote: We asked about that to IBM via PMR. The answer is no - you cannot do nic bonding with the vswitch NIC. So I think the presentation is a little misleading on that page. Hmm. That's weird. I just set up one on a

Re: bonding multiple qeth vnics to vswitch?

None - we asked before we tried. Got a no and so didn't do it. That's OK though - LACP vswitch was a better way to go and we've since implemented that. Marcy, You just lost me. LACP is on the trunk side of the VSWITCH. I am talking bonding on the port side of it. What exactly did you think of

Re: bonding multiple qeth vnics to vswitch?

I guess I should add that I did it with a Layer 2 VSWITCH, not Layer 3. Since the bonding module wants to modify the MAC address of the two slave NICs, you get nastygrams if you try it with Layer 3. Mark, From the bonding HOWTO guide: 7. Which switches/systems does it work with?

Re: bonding multiple qeth vnics to vswitch?

Mark, What mode did you set it up with? And do you actually see incoming data on both eth0 and eth1? If it is only outgoing data you are bonding it will not help me as Rob pointed out. My problem is with incoming. The 'Linux Ethernet Bonding Driver HOWTO' on sourceforge suggests you need

Re: Upcoming Webcast about SLES on System z for SAP workloads

Oh, interesting, thanks for the heads-up. We run SAP on SLES10 on z, just not HA. But it is *stable*, unlike the Windows setup we came from. Best regards, Pieter Harder pieter.har...@brabantwater.nl tel +31-73-6837133 / +31-6-47272537 -Oorspronkelijk bericht- Van: Linux on 390

Re: Backup Restore recommendations

but TSM tape handling on Linux is so awful and idiosyncratic (not to mention the idiotic fact that TSM for Linux cannot use channel-attached tape) that the price of the extra CPU is probably worth it. I respectfully disagree. I found FCP-based LTO libraries better behaved than our old 3494.

Re: Backup Restore recommendations

I respectfully disagree. I found FCP-based LTO libraries better behaved than our old 3494. And before you ask, I do come from WDSF (aka ADSM V1) and ADSM V2 and originally bought the 3494 with 3590 for the purpose. The price of the extra CPU (and licenses) on z/OS will probably outweigh what

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