Re: SFS problem
If I recall correctly, DIAG D4 is the one that manipulates the secondary ID, aka Alternate ID. (SECUSER is an old term). Diag 88 provides the ability to link minidisks and perform userid/password validations (if the issuer has appropriate authority). An interesting usage note for this is that DIAG D4 does not change the userid associated with any existing (already active) SFS connections. This is because it is a CP function and manipulates the VMDBK. Once set, future connections (via APPC/VM Connect) will utilize the Alternate ID. ... This is why severing all connections prior to setting the AltID will fix this type of problem, because CMS will (re) connect and use the AltID. If this is Nora's problem, an easy work around would be wrap the job with an exec that uses DMSGETWU and DMSPUSWU to set a new default work unit that contains the appropriate user, then run the job from the exec, then finally reset with DMSPOPWU. (If I'm remembering all of this correctly) John -- John Hall Safe Software, Inc. 727-608-8799 johnh...@safesoftware.com On Tue, Apr 19, 2011 at 11:48 AM, Schuh, Richard rsc...@visa.com wrote: Isn't that DIAG 88, instead of SECUSER? Regards, Richard Schuh -- *From:* The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] *On Behalf Of *John Hall *Sent:* Tuesday, April 19, 2011 6:41 AM *To:* IBMVM@LISTSERV.UARK.EDU *Subject:* Re: SFS problem Nora, Batch jobs normally run with the privileges of the owner of the job, using the SECUSER facility in z/VM. With SFS, this can lead to unexpected results when a prior batch job leaves the worker with a connection to the filepool under a different user's id. If the job ordering/selection of batch workers is somewhat random, you could see the outcome that you're experiencing (sometimes it works, sometimes it fails).
Re: SFS problem
I do not believe that this is the problem. I was giving you information on the failing job that I am most familiar with. Other jobs that fail are submitted to VMBatch by the ID that also owns the SFS directories. FYI, VMBatch is the IBM VM Batch Facility Version 2.2, I was not aware until recently that there are other products also known as VMBatch. If this has caused confusion, I apologize. Nora Graves nora.e.gra...@irs.gov Main IRS, Room 6531 (202) 622-6735 Fax (202) 622-3123 SE:W:CAR:MP:D:KS:BRSI From: The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] On Behalf Of John Hall Sent: Wednesday, April 20, 2011 10:04 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: SFS problem If I recall correctly, DIAG D4 is the one that manipulates the secondary ID, aka Alternate ID. (SECUSER is an old term). Diag 88 provides the ability to link minidisks and perform userid/password validations (if the issuer has appropriate authority). An interesting usage note for this is that DIAG D4 does not change the userid associated with any existing (already active) SFS connections. This is because it is a CP function and manipulates the VMDBK. Once set, future connections (via APPC/VM Connect) will utilize the Alternate ID. ... This is why severing all connections prior to setting the AltID will fix this type of problem, because CMS will (re) connect and use the AltID. If this is Nora's problem, an easy work around would be wrap the job with an exec that uses DMSGETWU and DMSPUSWU to set a new default work unit that contains the appropriate user, then run the job from the exec, then finally reset with DMSPOPWU. (If I'm remembering all of this correctly) John -- John Hall Safe Software, Inc. 727-608-8799 johnh...@safesoftware.com On Tue, Apr 19, 2011 at 11:48 AM, Schuh, Richard rsc...@visa.com wrote: Isn't that DIAG 88, instead of SECUSER? Regards, Richard Schuh From: The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] On Behalf Of John Hall Sent: Tuesday, April 19, 2011 6:41 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: SFS problem Nora, Batch jobs normally run with the privileges of the owner of the job, using the SECUSER facility in z/VM. With SFS, this can lead to unexpected results when a prior batch job leaves the worker with a connection to the filepool under a different user's id. If the job ordering/selection of batch workers is somewhat random, you could see the outcome that you're experiencing (sometimes it works, sometimes it fails).
Detaching A disk from z/Linux guest dynamically
Hi I have a copy of the DASD volume where the A (191) disk resides for a specific z/Linux guest. I want to point the guest to the new copied volume from the one it is currently using without bringing the guest down. Is there a way to do this? Thank You, Terry Martin Lockheed Martin CMS - CITIC 3300 Lord Baltimore Drive, Suite 200, 21244 Engineering Computing Mainframe Support Cell - 443 632-4191
Re: SFS problem
Interesting problem Nora. Nothing recorded in the SFS log either. Please post your POOLDEF statements and your DMSPARMS for the filepool having the problems. Also, what is the virtual storage size defined for the sfs server? Regards, Jim Hughes Consulting Systems Programmer Mainframe Technical Support Group Department of Information Technology State of New Hampshire 27 Hazen Drive Concord, NH 03301 603-271-5586Fax 603.271.1516 Statement of Confidentiality: The contents of this message are confidential. Any unauthorized disclosure, reproduction, use or dissemination (either whole or in part) is prohibited. If you are not the intended recipient of this message, please notify the sender immediately and delete the message from your system. From: The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] On Behalf Of Graves Nora E Sent: Wednesday, April 20, 2011 10:17 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: SFS problem I do not believe that this is the problem. I was giving you information on the failing job that I am most familiar with. Other jobs that fail are submitted to VMBatch by the ID that also owns the SFS directories. FYI, VMBatch is the IBM VM Batch Facility Version 2.2, I was not aware until recently that there are other products also known as VMBatch. If this has caused confusion, I apologize. Nora Graves nora.e.gra...@irs.gov Main IRS, Room 6531 (202) 622-6735 Fax (202) 622-3123 SE:W:CAR:MP:D:KS:BRSI From: The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] On Behalf Of John Hall Sent: Wednesday, April 20, 2011 10:04 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: SFS problem If I recall correctly, DIAG D4 is the one that manipulates the secondary ID, aka Alternate ID. (SECUSER is an old term). Diag 88 provides the ability to link minidisks and perform userid/password validations (if the issuer has appropriate authority). An interesting usage note for this is that DIAG D4 does not change the userid associated with any existing (already active) SFS connections. This is because it is a CP function and manipulates the VMDBK. Once set, future connections (via APPC/VM Connect) will utilize the Alternate ID. ... This is why severing all connections prior to setting the AltID will fix this type of problem, because CMS will (re) connect and use the AltID. If this is Nora's problem, an easy work around would be wrap the job with an exec that uses DMSGETWU and DMSPUSWU to set a new default work unit that contains the appropriate user, then run the job from the exec, then finally reset with DMSPOPWU. (If I'm remembering all of this correctly) John -- John Hall Safe Software, Inc. 727-608-8799 johnh...@safesoftware.com On Tue, Apr 19, 2011 at 11:48 AM, Schuh, Richard rsc...@visa.com wrote: Isn't that DIAG 88, instead of SECUSER? Regards, Richard Schuh From: The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] On Behalf Of John Hall Sent: Tuesday, April 19, 2011 6:41 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: SFS problem Nora, Batch jobs normally run with the privileges of the owner of the job, using the SECUSER facility in z/VM. With SFS, this can lead to unexpected results when a prior batch job leaves the worker with a connection to the filepool under a different user's id. If the job ordering/selection of batch workers is somewhat random, you could see the outcome that you're experiencing (sometimes it works, sometimes it fails).
Re: SFS problem
Nora, Is there ever a case where the command (EXEC, or whatever) fails when it is NOT run in a VMBATCH worker? If they never fail outside of VMBATCH workers, John probably has a good handle on the diagnosis. You may have to read a little bit more in the VMBATCH documentation about how VMBATCH workers get initialized, end, and especially: how the post-job cleanup process works. It might be as simple as changing the program to release the SFS directory before ending (and perhaps examining the connection and looping until it has been cleared). BTW, the other common VMBATCH product is from CA, called VM:Batch. Many moons ago there were other publically available freeware VMBATCH solutions, too -- IIRC, from colleges. Mike Walter Aon Corporation The opinions expressed herein are mine alone, not my employer's. Graves Nora E nora.e.gra...@irs.gov Sent by: The IBM z/VM Operating System IBMVM@LISTSERV.UARK.EDU 04/20/2011 09:17 AM Please respond to The IBM z/VM Operating System IBMVM@LISTSERV.UARK.EDU To IBMVM@LISTSERV.UARK.EDU cc Subject Re: SFS problem I do not believe that this is the problem. I was giving you information on the failing job that I am most familiar with. Other jobs that fail are submitted to VMBatch by the ID that also owns the SFS directories. FYI, VMBatch is the IBM VM Batch Facility Version 2.2, I was not aware until recently that there are other products also known as VMBatch. If this has caused confusion, I apologize. Nora Graves nora.e.gra...@irs.gov Main IRS, Room 6531 (202) 622-6735 Fax (202) 622-3123 SE:W:CAR:MP:D:KS:BRSI From: The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] On Behalf Of John Hall Sent: Wednesday, April 20, 2011 10:04 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: SFS problem If I recall correctly, DIAG D4 is the one that manipulates the secondary ID, aka Alternate ID. (SECUSER is an old term). Diag 88 provides the ability to link minidisks and perform userid/password validations (if the issuer has appropriate authority). An interesting usage note for this is that DIAG D4 does not change the userid associated with any existing (already active) SFS connections. This is because it is a CP function and manipulates the VMDBK. Once set, future connections (via APPC/VM Connect) will utilize the Alternate ID. ... This is why severing all connections prior to setting the AltID will fix this type of problem, because CMS will (re) connect and use the AltID. If this is Nora's problem, an easy work around would be wrap the job with an exec that uses DMSGETWU and DMSPUSWU to set a new default work unit that contains the appropriate user, then run the job from the exec, then finally reset with DMSPOPWU. (If I'm remembering all of this correctly) John -- John Hall Safe Software, Inc. 727-608-8799 johnh...@safesoftware.com On Tue, Apr 19, 2011 at 11:48 AM, Schuh, Richard rsc...@visa.com wrote: Isn't that DIAG 88, instead of SECUSER? Regards, Richard Schuh From: The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] On Behalf Of John Hall Sent: Tuesday, April 19, 2011 6:41 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: SFS problem Nora, Batch jobs normally run with the privileges of the owner of the job, using the SECUSER facility in z/VM. With SFS, this can lead to unexpected results when a prior batch job leaves the worker with a connection to the filepool under a different user's id. If the job ordering/selection of batch workers is somewhat random, you could see the outcome that you're experiencing (sometimes it works, sometimes it fails). The information contained in this e-mail and any accompanying documents may contain information that is confidential or otherwise protected from disclosure. If you are not the intended recipient of this message, or if this message has been addressed to you in error, please immediately alert the sender by reply e-mail and then delete this message, including any attachments. Any dissemination, distribution or other use of the contents of this message by anyone other than the intended recipient is strictly prohibited. All messages sent to and from this e-mail address may be monitored as permitted by applicable law and regulations to ensure compliance with our internal policies and to protect our business. E-mails are not secure and cannot be guaranteed to be error free as they can be intercepted, amended, lost or destroyed, or contain viruses. You are deemed to have accepted these risks if you communicate with us by e-mail.
Re: Detaching A disk from z/Linux guest dynamically
Yes - - change the directory entry for the user to point to the new (copied) volume - put directory online - on the guest - #CP DETACH 191 and then #CP LINK * 191 191 MR(or on linux: vmcp detach 191 and vmcp link myuser 191 191 mr ... where 'myuser' is the name of the userid.. (the * confuses bash so specify the user). If this is a Linux guest -- then the 191 isn't accessed any more (Linux is running).. so no need to reaccess. Scott Rohling On Wed, Apr 20, 2011 at 8:21 AM, Martin, Terry R. (CMS/CTR) (CTR) terry.mar...@cms.hhs.gov wrote: Hi I have a copy of the DASD volume where the A (191) disk resides for a specific z/Linux guest. I want to point the guest to the new copied volume from the one it is currently using without bringing the guest down. Is there a way to do this? *Thank You,* * * *Terry Martin* *Lockheed Martin* *CMS - CITIC* *3300 Lord Baltimore Drive, Suite 200, 21244 **Engineering Computing* *Mainframe Support* *Cell - 443 632-4191* * *
Re: Backout PTF(s) applied
Hi Steve, The VMSES/E way to remove a PTF is with VMFREM. If you put on an RSU the best way to remove it is to take a backup before you install it. VMFREM has a TEST option so I would recommend that you use it first. If all looks okay then run VMFREM without the TEST option. If something does not look right then you can always open a call to the support center. Pay attention to any messages. For example, if a build list was serviced with the PTF then you will need to do a VMFBLD and rerun VMFREM (should tell you this in a message). The default for VMFREM in UNAPPLY so if you want to also remove the parts associated with the PTF you need to use UNRECEIVE. Also note that the removed PTF(s) will be put in the exclude list, by default. So if you want to apply that PTF again you will have to manually remove it from the exclude list, such as HCPVM $EXCLIST. Be aware that a removed PTF may be a pre-req for another PTF. If so, then SERVICE or VMFAPPLY will fail, you can remove it from the exclude list and then restart SERVICE or VMAPPLY. Refer to the VMSES/E Introduction and Reference, Chapter 20, under the VMFREM EXEC for usage examples. Sincerely, Tami Zebrowski-Darrow z/VM VMSES/E Service and Support IBM Endicott
Re: Detaching A disk from z/Linux guest dynamically
If the 191 is only used at Linux boot, you can change the directory entry and then login to the VM userid running the Linux system and: BEGIN (if you get a CP READ) #CP DET 191 #CP LINK * 191 191 MR #CP DISC (assuming your LINEND char is #) If you are actually using the disk during runtime, then it's a lot safer to bounce the guest. -- db From: The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] On Behalf Of Martin, Terry R. (CMS/CTR) (CTR) Sent: Wednesday, April 20, 2011 10:22 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Detaching A disk from z/Linux guest dynamically Hi I have a copy of the DASD volume where the A (191) disk resides for a specific z/Linux guest. I want to point the guest to the new copied volume from the one it is currently using without bringing the guest down. Is there a way to do this? Thank You, Terry Martin Lockheed Martin CMS - CITIC 3300 Lord Baltimore Drive, Suite 200, 21244 Engineering Computing Mainframe Support Cell - 443 632-4191
Re: Detaching A disk from z/Linux guest dynamically
Hi, Ok I got it. Before I contacted the list I had tried doing the '#CP REL A (DET' from the guest. It did not take saying it was unknown command sort of what you get when you are issuing a command that the user's class does not allow. So I thought that the user did not have authority to do even the DEATCH. So now I know! Thanks! Thank You, Terry Martin Lockheed Martin CMS - CITIC 3300 Lord Baltimore Drive, Suite 200, 21244 Engineering Computing Mainframe Support Cell - 443 632-4191 From: The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] On Behalf Of Scott Rohling Sent: Wednesday, April 20, 2011 10:44 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: Detaching A disk from z/Linux guest dynamically Yes - - change the directory entry for the user to point to the new (copied) volume - put directory online - on the guest - #CP DETACH 191 and then #CP LINK * 191 191 MR(or on linux: vmcp detach 191 and vmcp link myuser 191 191 mr ... where 'myuser' is the name of the userid.. (the * confuses bash so specify the user). If this is a Linux guest -- then the 191 isn't accessed any more (Linux is running).. so no need to reaccess. Scott Rohling On Wed, Apr 20, 2011 at 8:21 AM, Martin, Terry R. (CMS/CTR) (CTR) terry.mar...@cms.hhs.govmailto:terry.mar...@cms.hhs.gov wrote: Hi I have a copy of the DASD volume where the A (191) disk resides for a specific z/Linux guest. I want to point the guest to the new copied volume from the one it is currently using without bringing the guest down. Is there a way to do this? Thank You, Terry Martin Lockheed Martin CMS - CITIC 3300 Lord Baltimore Drive, Suite 200, 21244 Engineering Computing Mainframe Support Cell - 443 632-4191tel:443%20632-4191
Re: Detaching A disk from z/Linux guest dynamically
Ok I got it. Before I contacted the list I had tried doing the '#CP REL A (DET' from the guest. It did not take saying it was unknown command sort of what you get when you are issuing a command that the user's class does not allow. So I thought that the user did not have authority to do even the DEATCH. So now I know! DETACH is a class G command, so everyone can do it. The problem was that RELEASE (and the whole concept of file modes) is a *CMS* command. If Linux is running, the only thing that's available to change the virtual machine configuration is CP commands, eg DETACH in this case. When you IPLed Linux, CMS goes away, so RELEASE A ( DET can't work.
Re: Detaching A disk from z/Linux guest dynamically
Ok thanks Scott got it. I appreciate the input from all! Thank You, Terry Martin Lockheed Martin CMS - CITIC 3300 Lord Baltimore Drive, Suite 200, 21244 Engineering Computing Mainframe Support Cell - 443 632-4191 From: The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] On Behalf Of Scott Rohling Sent: Wednesday, April 20, 2011 12:07 PM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: Detaching A disk from z/Linux guest dynamically Terry.. RELEASE is a CMS command.. not CP. You can use the CP command DETACH to detach a specific address.. but RELEASE will fail. ACCESS/RELEASE are strictly CMS concepts. If Linux is running -- then CMS is not -- so RELEASE/ACCESS have no meaning. I'm assuming you first IPL CMS in your Linux guests and it runs a PROFILE EXEC, which then IPLs the Linux disk. Once Linux is IPLed - no disks are 'accessed' as CMS is gone. So you're only left with DETACH/LINK to deal with virtual disks. Hope that helps - Scott Rohling On Wed, Apr 20, 2011 at 9:55 AM, Martin, Terry R. (CMS/CTR) (CTR) terry.mar...@cms.hhs.govmailto:terry.mar...@cms.hhs.gov wrote: Hi, Ok I got it. Before I contacted the list I had tried doing the '#CP REL A (DET' from the guest. It did not take saying it was unknown command sort of what you get when you are issuing a command that the user's class does not allow. So I thought that the user did not have authority to do even the DEATCH. So now I know! Thanks! Thank You, Terry Martin Lockheed Martin CMS - CITIC 3300 Lord Baltimore Drive, Suite 200, 21244 Engineering Computing Mainframe Support Cell - 443 632-4191tel:443%20632-4191 From: The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDUmailto:IBMVM@LISTSERV.UARK.EDU] On Behalf Of Scott Rohling Sent: Wednesday, April 20, 2011 10:44 AM To: IBMVM@LISTSERV.UARK.EDUmailto:IBMVM@LISTSERV.UARK.EDU Subject: Re: Detaching A disk from z/Linux guest dynamically Yes - - change the directory entry for the user to point to the new (copied) volume - put directory online - on the guest - #CP DETACH 191 and then #CP LINK * 191 191 MR(or on linux: vmcp detach 191 and vmcp link myuser 191 191 mr ... where 'myuser' is the name of the userid.. (the * confuses bash so specify the user). If this is a Linux guest -- then the 191 isn't accessed any more (Linux is running).. so no need to reaccess. Scott Rohling On Wed, Apr 20, 2011 at 8:21 AM, Martin, Terry R. (CMS/CTR) (CTR) terry.mar...@cms.hhs.govmailto:terry.mar...@cms.hhs.gov wrote: Hi I have a copy of the DASD volume where the A (191) disk resides for a specific z/Linux guest. I want to point the guest to the new copied volume from the one it is currently using without bringing the guest down. Is there a way to do this? Thank You, Terry Martin Lockheed Martin CMS - CITIC 3300 Lord Baltimore Drive, Suite 200, 21244 Engineering Computing Mainframe Support Cell - 443 632-4191tel:443%20632-4191
Re: SFS problem
Thank you, yes, that is correct... Apologies for mixing my terms. I should have been saying Alternate ID. John On Wed, Apr 20, 2011 at 12:33 PM, Schuh, Richard rsc...@visa.com wrote: Actually, SECUSER still exists and is something quite different. SECUSER defines a secondary user for receiving console messages and entering commands and responses. The entries are done as though they came from, not on behalf of, the user. Regards, Richard Schuh -- *From:* The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] *On Behalf Of *John Hall *Sent:* Wednesday, April 20, 2011 7:04 AM *To:* IBMVM@LISTSERV.UARK.EDU *Subject:* Re: SFS problem If I recall correctly, DIAG D4 is the one that manipulates the secondary ID, aka Alternate ID. (SECUSER is an old term). Diag 88 provides the ability to link minidisks and perform userid/password validations (if the issuer has appropriate authority). An interesting usage note for this is that DIAG D4 does not change the userid associated with any existing (already active) SFS connections. This is because it is a CP function and manipulates the VMDBK. Once set, future connections (via APPC/VM Connect) will utilize the Alternate ID. ... This is why severing all connections prior to setting the AltID will fix this type of problem, because CMS will (re) connect and use the AltID. If this is Nora's problem, an easy work around would be wrap the job with an exec that uses DMSGETWU and DMSPUSWU to set a new default work unit that contains the appropriate user, then run the job from the exec, then finally reset with DMSPOPWU. (If I'm remembering all of this correctly) John -- John Hall Safe Software, Inc. 727-608-8799 johnh...@safesoftware.com On Tue, Apr 19, 2011 at 11:48 AM, Schuh, Richard rsc...@visa.com wrote: Isn't that DIAG 88, instead of SECUSER? Regards, Richard Schuh -- *From:* The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] *On Behalf Of *John Hall *Sent:* Tuesday, April 19, 2011 6:41 AM *To:* IBMVM@LISTSERV.UARK.EDU *Subject:* Re: SFS problem Nora, Batch jobs normally run with the privileges of the owner of the job, using the SECUSER facility in z/VM. With SFS, this can lead to unexpected results when a prior batch job leaves the worker with a connection to the filepool under a different user's id. If the job ordering/selection of batch workers is somewhat random, you could see the outcome that you're experiencing (sometimes it works, sometimes it fails).
Re: Detaching A disk from z/Linux guest dynamically
Since these are CP commands use FOR command and avoid logging on the LINUX machine. FOR linuxname CMD DET 191 FOR linuxname CMD LINK * 191 191 MR On Wed, Apr 20, 2011 at 8:45 AM, David Boyes dbo...@sinenomine.net wrote: If the 191 is only used at Linux boot, you can change the directory entry and then login to the VM userid running the Linux system and: BEGIN (if you get a CP READ) #CP DET 191 #CP LINK * 191 191 MR #CP DISC (assuming your LINEND char is #) If you are actually using the disk during runtime, then it’s a lot safer to bounce the guest. -- db *From:* The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] *On Behalf Of *Martin, Terry R. (CMS/CTR) (CTR) *Sent:* Wednesday, April 20, 2011 10:22 AM *To:* IBMVM@LISTSERV.UARK.EDU *Subject:* Detaching A disk from z/Linux guest dynamically Hi I have a copy of the DASD volume where the A (191) disk resides for a specific z/Linux guest. I want to point the guest to the new copied volume from the one it is currently using without bringing the guest down. Is there a way to do this? *Thank You,* * * *Terry Martin* *Lockheed Martin* *CMS - CITIC* *3300 Lord Baltimore Drive, Suite 200, 21244 Engineering Computing* *Mainframe Support* *Cell - 443 632-4191* * *
Re: Detaching A disk from z/Linux guest dynamically
Thanks Tom I was just about to ask this question because I have a bunch of guests that I need to change. Now I tried the FOR command and received this: HCPFOR070E - Basically it is an authorization issue with the FOR command. We are running RACF here so do you know what the profile would be and what RACF class would need to be activated to define and permit this resource? Can I also do this via the SECUSER command? Thank You, Terry Martin Lockheed Martin CMS - CITIC 3300 Lord Baltimore Drive, Suite 200, 21244 Engineering Computing Mainframe Support Cell - 443 632-4191 From: The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] On Behalf Of Tom Huegel Sent: Wednesday, April 20, 2011 2:37 PM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: Detaching A disk from z/Linux guest dynamically Since these are CP commands use FOR command and avoid logging on the LINUX machine. FOR linuxname CMD DET 191 FOR linuxname CMD LINK * 191 191 MR On Wed, Apr 20, 2011 at 8:45 AM, David Boyes dbo...@sinenomine.netmailto:dbo...@sinenomine.net wrote: If the 191 is only used at Linux boot, you can change the directory entry and then login to the VM userid running the Linux system and: BEGIN (if you get a CP READ) #CP DET 191 #CP LINK * 191 191 MR #CP DISC (assuming your LINEND char is #) If you are actually using the disk during runtime, then it's a lot safer to bounce the guest. -- db From: The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDUmailto:IBMVM@LISTSERV.UARK.EDU] On Behalf Of Martin, Terry R. (CMS/CTR) (CTR) Sent: Wednesday, April 20, 2011 10:22 AM To: IBMVM@LISTSERV.UARK.EDUmailto:IBMVM@LISTSERV.UARK.EDU Subject: Detaching A disk from z/Linux guest dynamically Hi I have a copy of the DASD volume where the A (191) disk resides for a specific z/Linux guest. I want to point the guest to the new copied volume from the one it is currently using without bringing the guest down. Is there a way to do this? Thank You, Terry Martin Lockheed Martin CMS - CITIC 3300 Lord Baltimore Drive, Suite 200, 21244 Engineering Computing Mainframe Support Cell - 443 632-4191tel:443%20632-4191
Re: Detaching A disk from z/Linux guest dynamically
I'm thinking this would be controlled by VMCMD/VMXEVENT.. on my system a RAC VMXEVENT LIST shows that 'FOR.C' is 'NO_CTL' - so is not controlled by RACF.Not quite sure how to tell you to create and permit users to it if yours is CTL without some more digging. Maybe someone else will have this more readily at their fingertips. FOR is essentially the same as SET SECUSER and SEND commands.. so you can use these instead of FOR if you like.. : CP SET SECUSER user * CP SEND CP user command Note that CP is in FRONT of the user on the SEND .. indicating you want to SEND a command to the guest's CP - not the guest OS.. Also note: You likely want to issue SET SECUSER user RESET shortly after issuing the SEND CP command so that you don't stay secondary user for everyone you do this to. Scott Rohling On Wed, Apr 20, 2011 at 2:13 PM, Martin, Terry R. (CMS/CTR) (CTR) terry.mar...@cms.hhs.gov wrote: Thanks Tom I was just about to ask this question because I have a bunch of guests that I need to change. Now I tried the FOR command and received this: HCPFOR070E – Basically it is an authorization issue with the FOR command. We are running RACF here so do you know what the profile would be and what RACF class would need to be activated to define and permit this resource? Can I also do this via the SECUSER command? *Thank You,* * * *Terry Martin* *Lockheed Martin* *CMS - CITIC* *3300 Lord Baltimore Drive, Suite 200, 21244 **Engineering Computing* *Mainframe Support* *Cell - 443 632-4191* * * *From:* The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] *On Behalf Of *Tom Huegel *Sent:* Wednesday, April 20, 2011 2:37 PM *To:* IBMVM@LISTSERV.UARK.EDU *Subject:* Re: Detaching A disk from z/Linux guest dynamically Since these are CP commands use FOR command and avoid logging on the LINUX machine. FOR linuxname CMD DET 191 FOR linuxname CMD LINK * 191 191 MR On Wed, Apr 20, 2011 at 8:45 AM, David Boyes dbo...@sinenomine.net wrote: If the 191 is only used at Linux boot, you can change the directory entry and then login to the VM userid running the Linux system and: BEGIN (if you get a CP READ) #CP DET 191 #CP LINK * 191 191 MR #CP DISC (assuming your LINEND char is #) If you are actually using the disk during runtime, then it’s a lot safer to bounce the guest. -- db *From:* The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] *On Behalf Of *Martin, Terry R. (CMS/CTR) (CTR) *Sent:* Wednesday, April 20, 2011 10:22 AM *To:* IBMVM@LISTSERV.UARK.EDU *Subject:* Detaching A disk from z/Linux guest dynamically Hi I have a copy of the DASD volume where the A (191) disk resides for a specific z/Linux guest. I want to point the guest to the new copied volume from the one it is currently using without bringing the guest down. Is there a way to do this? *Thank You,* * * *Terry Martin* *Lockheed Martin* *CMS - CITIC* *3300 Lord Baltimore Drive, Suite 200, 21244 Engineering Computing* *Mainframe Support* *Cell - 443 632-4191* * *
Re: Detaching A disk from z/Linux guest dynamically
On Wed, Apr 20, 2011 at 10:13 PM, Martin, Terry R. (CMS/CTR) (CTR) terry.mar...@cms.hhs.gov wrote: HCPFOR070E – Basically it is an authorization issue with the FOR command. We are running RACF here so do you know what the profile would be and what RACF class would need to be activated to define and permit this resource? Can I also do this via the SECUSER command? The SECUSER can issue these #CP SEND CP LINUX007 DET 191 #CP SEND CP LINUX007 LINK * 191 191 MR But in general I consider it abuse of power to use a privileged userid (with FOR authorisation or as SECUSER) when the user could have done it himself. You could also do it from Linux (use modprobe vmcp if that does not happen at boot time already) vmcp det 191 vmcp link * 191 191 mr Rob
Re: Detaching A disk from z/Linux guest dynamically
If that is the rule, then we don't need SECUSER or FOR, or when would you use them?? Just courious. On Wed, Apr 20, 2011 at 1:40 PM, Rob van der Heij rvdh...@gmail.com wrote: On Wed, Apr 20, 2011 at 10:13 PM, Martin, Terry R. (CMS/CTR) (CTR) terry.mar...@cms.hhs.gov wrote: HCPFOR070E – Basically it is an authorization issue with the FOR command. We are running RACF here so do you know what the profile would be and what RACF class would need to be activated to define and permit this resource? Can I also do this via the SECUSER command? The SECUSER can issue these #CP SEND CP LINUX007 DET 191 #CP SEND CP LINUX007 LINK * 191 191 MR But in general I consider it abuse of power to use a privileged userid (with FOR authorisation or as SECUSER) when the user could have done it himself. You could also do it from Linux (use modprobe vmcp if that does not happen at boot time already) vmcp det 191 vmcp link * 191 191 mr Rob
Re: Detaching A disk from z/Linux guest dynamically
I think Rob's comment is valid depending on the situation... You typically would not 'mess' with a running guest unless you own that guest and are responsible for it's continued operation. The owner would want to know why the change was needed and the recommended implementation and want to do it themselves when they deem it necessary and not have you mucking about with their live guest. In the case of Linux guests which are IPLing CMS and then Linux -- the lines are a little blurrier. The Linux guys probably don't want to be bothered messing around with the 191 disk and something that to them is part of the hypervisor and not their concern. As long as you don't mess with anything that Linux uses -- they don't care. There are certainly valid uses for SECUSER/SEND/FOR commands -- I don't agree that their use is an abuse of power. But of course they could be depending on what you do with them. I suppose you could consider a SHUTDOWN command an abuse of power as well... ;-) Scott Rohling On Wed, Apr 20, 2011 at 3:22 PM, Tom Huegel tehue...@gmail.com wrote: If that is the rule, then we don't need SECUSER or FOR, or when would you use them?? Just courious. On Wed, Apr 20, 2011 at 1:40 PM, Rob van der Heij rvdh...@gmail.comwrote: On Wed, Apr 20, 2011 at 10:13 PM, Martin, Terry R. (CMS/CTR) (CTR) terry.mar...@cms.hhs.gov wrote: HCPFOR070E – Basically it is an authorization issue with the FOR command. We are running RACF here so do you know what the profile would be and what RACF class would need to be activated to define and permit this resource? Can I also do this via the SECUSER command? The SECUSER can issue these #CP SEND CP LINUX007 DET 191 #CP SEND CP LINUX007 LINK * 191 191 MR But in general I consider it abuse of power to use a privileged userid (with FOR authorisation or as SECUSER) when the user could have done it himself. You could also do it from Linux (use modprobe vmcp if that does not happen at boot time already) vmcp det 191 vmcp link * 191 191 mr Rob
Re: Detaching A disk from z/Linux guest dynamically
On Wed, Apr 20, 2011 at 11:22 PM, Tom Huegel tehue...@gmail.com wrote: If that is the rule, then we don't need SECUSER or FOR, or when would you use them?? Just courious. Don't know whether it is *the* rule, but it's mine. When you do your job with the least amount of special privileges, there's less to justify. In many cases you need to audit the use of these special privileges, so it helps to avoid the need for special privileges. And there's the risk of mistakes. Even though you can, you shouldn't use MAINT for all kind of trivial work that could be done also on a normal userid. There's a trade-off between convenience and security, and only you can do that yourself. YMMV depending on how long ago you shut down the production system or forced off the wrong virtual machine. The purpose of SECUSER is to perform programmed interaction with a virtual machine that runs a program that does not offer that amount of control. When you SET SECUSER to steal control in such a situation, you risk integrity because not all console output is trapped anymore. The FOR command avoids stealing secuser, but does risk the guest being in console function wait when the legitimate controller wants to issue a command. And you might confusing things by producing unexpected console output. One of my other rules is not to hide evidence of what you've done, and leave a clear trail in case you get lost and people come looking for you. To see in the operator logging who logged on to the virtual machine may save you hours when searching for clues. It often outweighs the few seconds you gain by sneaking a command under the covers with FOR. Rob
z/VM RedHat Virtual Machine Memory abend
Hi s390x Gurus I´m new to Linux on z and we are conducting a POC test of Linux Red Hat with Oracle running under z/VM 5.4 RSU 1003 and a z/10 BC model A00 (IFL Only). If linux virtual machine is defined with 64G in directory we got an abend during startup (see below). Doing some tests I found that I can define it until 59G in directory (60794036k from TOP linux command) and it will startup correctly. My questions are: 1 - Is this a limitation of linux s390x or Red Hat distribution? 2 - Is this a linux s390x bug or Red Hat distribution? 3 - How can I circunvent this so we can continue with POC (Proof Of Concept)? Thanks in advance for all hints and tips about. 00: Booting default (2.6.18-194.8.1.el5)... Linux version 2.6.18-194.8.1.el5 (mockbu...@s390-002.build.bos.redhat.com) (gcc version 4.1.2 20080704 (Red Hat 4.1.2-48)) #1 SMP Wed Jun 23 11:09:16 EDT 2010 We are running under VM (64 bit mode) Detected 3 CPU's Boot cpu address 0 Built 1 zonelists. Total pages: 16777216 Kernel command line: root=LABEL=/ BOOT_IMAGE=0 PID hash table entries: 4096 (order: 12, 32768 bytes) Dentry cache hash table entries: 8388608 (order: 14, 67108864 bytes) Inode-cache hash table entries: 4194304 (order: 13, 33554432 bytes) *Memory: 65951564k/67108864k available* (3414k kernel code, 0k reserved, 2256k dat a, 136k init) Write protected kernel read-only data: 0x356000 - 0x409fff Calibrating delay loop... 2981.88 BogoMIPS (lpj=14909440) Security Framework v1.0.0 initialized SELinux: Initializing. selinux_register_security: Registering secondary module capability Capability LSM initialized as secondary Mount-cache hash table entries: 256 cpu 0 phys_idx=0 vers=FF ident=01F2D6 machine=2098 unused=8000 cpu 1 phys_idx=1 vers=FF ident=01F2D6 machine=2098 unused=8000 cpu 2 phys_idx=2 vers=FF ident=01F2D6 machine=2098 unused=8000 Brought up 3 CPUs migration_cost=1000 checking if image is initramfs...it isn't (bad gzip magic numbers); looks like a n initrd Freeing initrd memory: 2759k freed list_del corruption. prev-next should be 8001bff0, but was 8001 c840 kernel BUG at lib/list_debug.c:65! illegal operation: 0001 Ý#1¨ CPU: 0 Not tainted 2.6.18-194.8.1.el5 #1 Process swapper (pid: 1, task: c611f788, ksp: c6123b10) Krnl PSW : 040400018000 002685d6 (list_del+0x9e/0xcc) Krnl GPRS: 0015 c6123cb8 0026 0400 0012a83e 0733 000a 0050e400 0001 8001bf90 8001bff0 8001bfce 00369878 002685d2 c6123d10 Krnl Code: d2 07 10 08 20 08 e3 10 d0 08 00 04 e3 10 20 08 00 24 e3 10 Call Trace: (Ý002685d2¨ list_del+0x9a/0xcc) Ý0017820a¨ free_pages_bulk+0x9e/0x34c Ý0017868a¨ free_hot_cold_page+0x1d2/0x1f4 Ý001009c0¨ free_initrd_mem+0x8c/0xc8 Ý005944ee¨ free_initrd+0xba/0xe4 Ý0058e324¨ init+0x1a0/0x32c Ý0010558e¨ kernel_thread_starter+0x6/0xc Ý00105588¨ kernel_thread_starter+0x0/0xc 0Kernel panic - not syncing: Fatal exception: panic_on_oops 01: HCPGSP2629I The virtual machine is placed in CP mode due to a SIGP stop from CPU 00. 02: HCPGSP2629I The virtual machine is placed in CP mode due to a SIGP stop from CPU 00. 00: HCPGIR450W CP entered; disabled wait PSW 00020001 8000 0010BDBE -- Carlos Bodra IBM Certified Specialist System z Sao Paulo - Brazil
Re: z/VM RedHat Virtual Machine Memory abend
Are you Running VM on this or zLinux only on an LPAR? Larry Davis From: The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] On Behalf Of Carlos Bodra - Pessoal Sent: Wednesday, April 20, 2011 6:19 PM To: IBMVM@LISTSERV.UARK.EDU Subject: z/VM RedHat Virtual Machine Memory abend Hi s390x Gurus I´m new to Linux on z and we are conducting a POC test of Linux Red Hat with Oracle running under z/VM 5.4 RSU 1003 and a z/10 BC model A00 (IFL Only). If linux virtual machine is defined with 64G in directory we got an abend during startup (see below). Doing some tests I found that I can define it until 59G in directory (60794036k from TOP linux command) and it will startup correctly. My questions are: 1 - Is this a limitation of linux s390x or Red Hat distribution? 2 - Is this a linux s390x bug or Red Hat distribution? 3 - How can I circunvent this so we can continue with POC (Proof Of Concept)? Thanks in advance for all hints and tips about. 00: Booting default (2.6.18-194.8.1.el5)... Linux version 2.6.18-194.8.1.el5 (mockbu...@s390-002.build.bos.redhat.commailto:mockbu...@s390-002.build.bos.redhat.com) (gcc version 4.1.2 20080704 (Red Hat 4.1.2-48)) #1 SMP Wed Jun 23 11:09:16 EDT 2010 We are running under VM (64 bit mode) Detected 3 CPU's Boot cpu address 0 Built 1 zonelists. Total pages: 16777216 Kernel command line: root=LABEL=/ BOOT_IMAGE=0 PID hash table entries: 4096 (order: 12, 32768 bytes) Dentry cache hash table entries: 8388608 (order: 14, 67108864 bytes) Inode-cache hash table entries: 4194304 (order: 13, 33554432 bytes) Memory: 65951564k/67108864k available (3414k kernel code, 0k reserved, 2256k dat a, 136k init) Write protected kernel read-only data: 0x356000 - 0x409fff Calibrating delay loop... 2981.88 BogoMIPS (lpj=14909440) Security Framework v1.0.0 initialized SELinux: Initializing. selinux_register_security: Registering secondary module capability Capability LSM initialized as secondary Mount-cache hash table entries: 256 cpu 0 phys_idx=0 vers=FF ident=01F2D6 machine=2098 unused=8000 cpu 1 phys_idx=1 vers=FF ident=01F2D6 machine=2098 unused=8000 cpu 2 phys_idx=2 vers=FF ident=01F2D6 machine=2098 unused=8000 Brought up 3 CPUs migration_cost=1000 checking if image is initramfs...it isn't (bad gzip magic numbers); looks like a n initrd Freeing initrd memory: 2759k freed list_del corruption. prev-next should be 8001bff0, but was 8001 c840 kernel BUG at lib/list_debug.c:65! illegal operation: 0001 Ý#1¨ CPU: 0 Not tainted 2.6.18-194.8.1.el5 #1 Process swapper (pid: 1, task: c611f788, ksp: c6123b10) Krnl PSW : 040400018000 002685d6 (list_del+0x9e/0xcc) Krnl GPRS: 0015 c6123cb8 0026 0400 0012a83e 0733 000a 0050e400 0001 8001bf90 8001bff0 8001bfce 00369878 002685d2 c6123d10 Krnl Code: d2 07 10 08 20 08 e3 10 d0 08 00 04 e3 10 20 08 00 24 e3 10 Call Trace: (Ý002685d2¨ list_del+0x9a/0xcc) Ý0017820a¨ free_pages_bulk+0x9e/0x34c Ý0017868a¨ free_hot_cold_page+0x1d2/0x1f4 Ý001009c0¨ free_initrd_mem+0x8c/0xc8 Ý005944ee¨ free_initrd+0xba/0xe4 Ý0058e324¨ init+0x1a0/0x32c Ý0010558e¨ kernel_thread_starter+0x6/0xc Ý00105588¨ kernel_thread_starter+0x0/0xc 0Kernel panic - not syncing: Fatal exception: panic_on_oops 01: HCPGSP2629I The virtual machine is placed in CP mode due to a SIGP stop from CPU 00. 02: HCPGSP2629I The virtual machine is placed in CP mode due to a SIGP stop from CPU 00. 00: HCPGIR450W CP entered; disabled wait PSW 00020001 8000 0010BDBE -- Carlos Bodra IBM Certified Specialist System z Sao Paulo - Brazil
Re: z/VM RedHat Virtual Machine Memory abend
Larry, We are running it z/VM 5.4 RSU 1003 (lastest), but problem is connected to Linux, because I changed MAINT user memory to 128GB and all runs fine. This machine has no CP´s just IFL´s processors. Carlos Bodra IBM Certified Specialist System z Sao Paulo - Brazil Em 20/04/2011 19:24, Davis, Larry (National VM/VSE Capability) escreveu: Are you Running VM on this or zLinux only on an LPAR? Larry Davis** *From:*The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] *On Behalf Of *Carlos Bodra - Pessoal *Sent:* Wednesday, April 20, 2011 6:19 PM *To:* IBMVM@LISTSERV.UARK.EDU *Subject:* z/VM RedHat Virtual Machine Memory abend Hi s390x Gurus I´m new to Linux on z and we are conducting a POC test of Linux Red Hat with Oracle running under z/VM 5.4 RSU 1003 and a z/10 BC model A00 (IFL Only). If linux virtual machine is defined with 64G in directory we got an abend during startup (see below). Doing some tests I found that I can define it until 59G in directory (60794036k from TOP linux command) and it will startup correctly. My questions are: 1 - Is this a limitation of linux s390x or Red Hat distribution? 2 - Is this a linux s390x bug or Red Hat distribution? 3 - How can I circunvent this so we can continue with POC (Proof Of Concept)? Thanks in advance for all hints and tips about. 00: Booting default (2.6.18-194.8.1.el5)... Linux version 2.6.18-194.8.1.el5 (mockbu...@s390-002.build.bos.redhat.com mailto:mockbu...@s390-002.build.bos.redhat.com) (gcc version 4.1.2 20080704 (Red Hat 4.1.2-48)) #1 SMP Wed Jun 23 11:09:16 EDT 2010 We are running under VM (64 bit mode) Detected 3 CPU's Boot cpu address 0 Built 1 zonelists. Total pages: 16777216 Kernel command line: root=LABEL=/ BOOT_IMAGE=0 PID hash table entries: 4096 (order: 12, 32768 bytes) Dentry cache hash table entries: 8388608 (order: 14, 67108864 bytes) Inode-cache hash table entries: 4194304 (order: 13, 33554432 bytes) *Memory: 65951564k/67108864k available*(3414k kernel code, 0k reserved, 2256k dat a, 136k init) Write protected kernel read-only data: 0x356000 - 0x409fff Calibrating delay loop... 2981.88 BogoMIPS (lpj=14909440) Security Framework v1.0.0 initialized SELinux: Initializing. selinux_register_security: Registering secondary module capability Capability LSM initialized as secondary Mount-cache hash table entries: 256 cpu 0 phys_idx=0 vers=FF ident=01F2D6 machine=2098 unused=8000 cpu 1 phys_idx=1 vers=FF ident=01F2D6 machine=2098 unused=8000 cpu 2 phys_idx=2 vers=FF ident=01F2D6 machine=2098 unused=8000 Brought up 3 CPUs migration_cost=1000 checking if image is initramfs...it isn't (bad gzip magic numbers); looks like a n initrd Freeing initrd memory: 2759k freed list_del corruption. prev-next should be 8001bff0, but was 8001 c840 kernel BUG at lib/list_debug.c:65! illegal operation: 0001 Ý#1¨ CPU: 0 Not tainted 2.6.18-194.8.1.el5 #1 Process swapper (pid: 1, task: c611f788, ksp: c6123b10) Krnl PSW : 040400018000 002685d6 (list_del+0x9e/0xcc) Krnl GPRS: 0015 c6123cb8 0026 0400 0012a83e 0733 000a 0050e400 0001 8001bf90 8001bff0 8001bfce 00369878 002685d2 c6123d10 Krnl Code: d2 07 10 08 20 08 e3 10 d0 08 00 04 e3 10 20 08 00 24 e3 10 Call Trace: (Ý002685d2¨ list_del+0x9a/0xcc) Ý0017820a¨ free_pages_bulk+0x9e/0x34c Ý0017868a¨ free_hot_cold_page+0x1d2/0x1f4 Ý001009c0¨ free_initrd_mem+0x8c/0xc8 Ý005944ee¨ free_initrd+0xba/0xe4 Ý0058e324¨ init+0x1a0/0x32c Ý0010558e¨ kernel_thread_starter+0x6/0xc Ý00105588¨ kernel_thread_starter+0x0/0xc 0Kernel panic - not syncing: Fatal exception: panic_on_oops 01: HCPGSP2629I The virtual machine is placed in CP mode due to a SIGP stop from CPU 00. 02: HCPGSP2629I The virtual machine is placed in CP mode due to a SIGP stop from CPU 00. 00: HCPGIR450W CP entered; disabled wait PSW 00020001 8000 0010BDBE -- Carlos Bodra IBM Certified Specialist System z Sao Paulo - Brazil
Re: Detaching A disk from z/Linux guest dynamically
On Wed, Apr 20, 2011 at 11:54 PM, Scott Rohling scott.rohl...@gmail.com wrote: There are certainly valid uses for SECUSER/SEND/FOR commands -- I don't agree that their use is an abuse of power. But of course they could be depending on what you do with them. I suppose you could consider a SHUTDOWN command an abuse of power as well... ;-) Your response shows that I failed to make my point. What I mean with abuse of power is doing the job with tools that are sharper or heavier than needed. I have no reason to walk around all day with a userid capable to issue a SHUTDOWN. Most serious installations that I know have rearranged their privilege classes such that 1) don't use a CLASS A userid unless you have things that require it 2) rearrange popular commands (like LOCK and UNLOCK) to avoid 1) as long as you can 3) move the SHUTDOWN out of CLASS A to avoid mistakes by those that need CLASS A Rob
Re: z/VM RedHat Virtual Machine Memory abend
What is your Hardware Memory configuration for Main Storage and XSTORE for VM Larry Davis From: The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] On Behalf Of Carlos Bodra - Pessoal Sent: Wednesday, April 20, 2011 6:39 PM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: z/VM RedHat Virtual Machine Memory abend Larry, We are running it z/VM 5.4 RSU 1003 (lastest), but problem is connected to Linux, because I changed MAINT user memory to 128GB and all runs fine. This machine has no CP´s just IFL´s processors. Carlos Bodra IBM Certified Specialist System z Sao Paulo - Brazil Em 20/04/2011 19:24, Davis, Larry (National VM/VSE Capability) escreveu: Are you Running VM on this or zLinux only on an LPAR? Larry Davis From: The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] On Behalf Of Carlos Bodra - Pessoal Sent: Wednesday, April 20, 2011 6:19 PM To: IBMVM@LISTSERV.UARK.EDUmailto:IBMVM@LISTSERV.UARK.EDU Subject: z/VM RedHat Virtual Machine Memory abend Hi s390x Gurus I´m new to Linux on z and we are conducting a POC test of Linux Red Hat with Oracle running under z/VM 5.4 RSU 1003 and a z/10 BC model A00 (IFL Only). If linux virtual machine is defined with 64G in directory we got an abend during startup (see below). Doing some tests I found that I can define it until 59G in directory (60794036k from TOP linux command) and it will startup correctly. My questions are: 1 - Is this a limitation of linux s390x or Red Hat distribution? 2 - Is this a linux s390x bug or Red Hat distribution? 3 - How can I circunvent this so we can continue with POC (Proof Of Concept)? Thanks in advance for all hints and tips about. 00: Booting default (2.6.18-194.8.1.el5)... Linux version 2.6.18-194.8.1.el5 (mockbu...@s390-002.build.bos.redhat.commailto:mockbu...@s390-002.build.bos.redhat.com) (gcc version 4.1.2 20080704 (Red Hat 4.1.2-48)) #1 SMP Wed Jun 23 11:09:16 EDT 2010 We are running under VM (64 bit mode) Detected 3 CPU's Boot cpu address 0 Built 1 zonelists. Total pages: 16777216 Kernel command line: root=LABEL=/ BOOT_IMAGE=0 PID hash table entries: 4096 (order: 12, 32768 bytes) Dentry cache hash table entries: 8388608 (order: 14, 67108864 bytes) Inode-cache hash table entries: 4194304 (order: 13, 33554432 bytes) Memory: 65951564k/67108864k available (3414k kernel code, 0k reserved, 2256k dat a, 136k init) Write protected kernel read-only data: 0x356000 - 0x409fff Calibrating delay loop... 2981.88 BogoMIPS (lpj=14909440) Security Framework v1.0.0 initialized SELinux: Initializing. selinux_register_security: Registering secondary module capability Capability LSM initialized as secondary Mount-cache hash table entries: 256 cpu 0 phys_idx=0 vers=FF ident=01F2D6 machine=2098 unused=8000 cpu 1 phys_idx=1 vers=FF ident=01F2D6 machine=2098 unused=8000 cpu 2 phys_idx=2 vers=FF ident=01F2D6 machine=2098 unused=8000 Brought up 3 CPUs migration_cost=1000 checking if image is initramfs...it isn't (bad gzip magic numbers); looks like a n initrd Freeing initrd memory: 2759k freed list_del corruption. prev-next should be 8001bff0, but was 8001 c840 kernel BUG at lib/list_debug.c:65! illegal operation: 0001 Ý#1¨ CPU: 0 Not tainted 2.6.18-194.8.1.el5 #1 Process swapper (pid: 1, task: c611f788, ksp: c6123b10) Krnl PSW : 040400018000 002685d6 (list_del+0x9e/0xcc) Krnl GPRS: 0015 c6123cb8 0026 0400 0012a83e 0733 000a 0050e400 0001 8001bf90 8001bff0 8001bfce 00369878 002685d2 c6123d10 Krnl Code: d2 07 10 08 20 08 e3 10 d0 08 00 04 e3 10 20 08 00 24 e3 10 Call Trace: (Ý002685d2¨ list_del+0x9a/0xcc) Ý0017820a¨ free_pages_bulk+0x9e/0x34c Ý0017868a¨ free_hot_cold_page+0x1d2/0x1f4 Ý001009c0¨ free_initrd_mem+0x8c/0xc8 Ý005944ee¨ free_initrd+0xba/0xe4 Ý0058e324¨ init+0x1a0/0x32c Ý0010558e¨ kernel_thread_starter+0x6/0xc Ý00105588¨ kernel_thread_starter+0x0/0xc 0Kernel panic - not syncing: Fatal exception: panic_on_oops 01: HCPGSP2629I The virtual machine is placed in CP mode due to a SIGP stop from CPU 00. 02: HCPGSP2629I The virtual machine is placed in CP mode due to a SIGP stop from CPU 00. 00: HCPGIR450W CP entered; disabled wait PSW 00020001 8000 0010BDBE -- Carlos Bodra IBM Certified Specialist System z Sao Paulo - Brazil
Re: z/VM RedHat Virtual Machine Memory abend
q stor STORAGE = 48G CONFIGURED = 48G INC = 128M STANDBY = 0 RESERVED = 0 Ready; T=0.01/0.01 20:33:09 No xstore defined. Carlos Bodra IBM Certified Specialist System z Sao Paulo - Brazil Em 20/04/2011 20:04, Davis, Larry (National VM/VSE Capability) escreveu: What is your Hardware Memory configuration for Main Storage and XSTORE for VM Larry Davis** *From:*The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] *On Behalf Of *Carlos Bodra - Pessoal *Sent:* Wednesday, April 20, 2011 6:39 PM *To:* IBMVM@LISTSERV.UARK.EDU *Subject:* Re: z/VM RedHat Virtual Machine Memory abend Larry, We are running it z/VM 5.4 RSU 1003 (lastest), but problem is connected to Linux, because I changed MAINT user memory to 128GB and all runs fine. This machine has no CP´s just IFL´s processors. Carlos Bodra IBM Certified Specialist System z Sao Paulo - Brazil Em 20/04/2011 19:24, Davis, Larry (National VM/VSE Capability) escreveu: Are you Running VM on this or zLinux only on an LPAR? Larry Davis *From:*The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] *On Behalf Of *Carlos Bodra - Pessoal *Sent:* Wednesday, April 20, 2011 6:19 PM *To:* IBMVM@LISTSERV.UARK.EDU mailto:IBMVM@LISTSERV.UARK.EDU *Subject:* z/VM RedHat Virtual Machine Memory abend Hi s390x Gurus I´m new to Linux on z and we are conducting a POC test of Linux Red Hat with Oracle running under z/VM 5.4 RSU 1003 and a z/10 BC model A00 (IFL Only). If linux virtual machine is defined with 64G in directory we got an abend during startup (see below). Doing some tests I found that I can define it until 59G in directory (60794036k from TOP linux command) and it will startup correctly. My questions are: 1 - Is this a limitation of linux s390x or Red Hat distribution? 2 - Is this a linux s390x bug or Red Hat distribution? 3 - How can I circunvent this so we can continue with POC (Proof Of Concept)? Thanks in advance for all hints and tips about. 00: Booting default (2.6.18-194.8.1.el5)... Linux version 2.6.18-194.8.1.el5 (mockbu...@s390-002.build.bos.redhat.com mailto:mockbu...@s390-002.build.bos.redhat.com) (gcc version 4.1.2 20080704 (Red Hat 4.1.2-48)) #1 SMP Wed Jun 23 11:09:16 EDT 2010 We are running under VM (64 bit mode) Detected 3 CPU's Boot cpu address 0 Built 1 zonelists. Total pages: 16777216 Kernel command line: root=LABEL=/ BOOT_IMAGE=0 PID hash table entries: 4096 (order: 12, 32768 bytes) Dentry cache hash table entries: 8388608 (order: 14, 67108864 bytes) Inode-cache hash table entries: 4194304 (order: 13, 33554432 bytes) *Memory: 65951564k/67108864k available*(3414k kernel code, 0k reserved, 2256k dat a, 136k init) Write protected kernel read-only data: 0x356000 - 0x409fff Calibrating delay loop... 2981.88 BogoMIPS (lpj=14909440) Security Framework v1.0.0 initialized SELinux: Initializing. selinux_register_security: Registering secondary module capability Capability LSM initialized as secondary Mount-cache hash table entries: 256 cpu 0 phys_idx=0 vers=FF ident=01F2D6 machine=2098 unused=8000 cpu 1 phys_idx=1 vers=FF ident=01F2D6 machine=2098 unused=8000 cpu 2 phys_idx=2 vers=FF ident=01F2D6 machine=2098 unused=8000 Brought up 3 CPUs migration_cost=1000 checking if image is initramfs...it isn't (bad gzip magic numbers); looks like a n initrd Freeing initrd memory: 2759k freed list_del corruption. prev-next should be 8001bff0, but was 8001 c840 kernel BUG at lib/list_debug.c:65! illegal operation: 0001 Ý#1¨ CPU: 0 Not tainted 2.6.18-194.8.1.el5 #1 Process swapper (pid: 1, task: c611f788, ksp: c6123b10) Krnl PSW : 040400018000 002685d6 (list_del+0x9e/0xcc) Krnl GPRS: 0015 c6123cb8 0026 0400 0012a83e 0733 000a 0050e400 0001 8001bf90 8001bff0 8001bfce 00369878 002685d2 c6123d10 Krnl Code: d2 07 10 08 20 08 e3 10 d0 08 00 04 e3 10 20 08 00 24 e3 10 Call Trace: (Ý002685d2¨ list_del+0x9a/0xcc) Ý0017820a¨ free_pages_bulk+0x9e/0x34c Ý0017868a¨ free_hot_cold_page+0x1d2/0x1f4 Ý001009c0¨ free_initrd_mem+0x8c/0xc8 Ý005944ee¨ free_initrd+0xba/0xe4 Ý0058e324¨ init+0x1a0/0x32c Ý0010558e¨ kernel_thread_starter+0x6/0xc Ý00105588¨ kernel_thread_starter+0x0/0xc 0Kernel panic - not syncing: Fatal exception: panic_on_oops 01: HCPGSP2629I The virtual machine is placed in CP mode due to a SIGP stop from CPU 00. 02: HCPGSP2629I The virtual machine is placed in CP mode due to a SIGP stop from CPU 00. 00: HCPGIR450W CP entered; disabled wait PSW 00020001 8000 0010BDBE -- Carlos Bodra IBM Certified Specialist System z Sao Paulo - Brazil
Re: z/VM RedHat Virtual Machine Memory abend
Since you are overcommitting memory -- how much paging space do you have? Scott Rohling On Wed, Apr 20, 2011 at 5:32 PM, Carlos Bodra - Pessoal cbo...@terra.com.br wrote: q stor STORAGE = 48G CONFIGURED = 48G INC = 128M STANDBY = 0 RESERVED = 0 Ready; T=0.01/0.01 20:33:09 No xstore defined. Carlos Bodra IBM Certified Specialist System z Sao Paulo - Brazil Em 20/04/2011 20:04, Davis, Larry (National VM/VSE Capability) escreveu: What is your Hardware Memory configuration for Main Storage and XSTORE for VM Larry Davis** *From:* The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDUIBMVM@LISTSERV.UARK.EDU] *On Behalf Of *Carlos Bodra - Pessoal *Sent:* Wednesday, April 20, 2011 6:39 PM *To:* IBMVM@LISTSERV.UARK.EDU *Subject:* Re: z/VM RedHat Virtual Machine Memory abend Larry, We are running it z/VM 5.4 RSU 1003 (lastest), but problem is connected to Linux, because I changed MAINT user memory to 128GB and all runs fine. This machine has no CP´s just IFL´s processors. Carlos Bodra IBM Certified Specialist System z Sao Paulo - Brazil Em 20/04/2011 19:24, Davis, Larry (National VM/VSE Capability) escreveu: Are you Running VM on this or zLinux only on an LPAR? Larry Davis *From:* The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDUIBMVM@LISTSERV.UARK.EDU] *On Behalf Of *Carlos Bodra - Pessoal *Sent:* Wednesday, April 20, 2011 6:19 PM *To:* IBMVM@LISTSERV.UARK.EDU *Subject:* z/VM RedHat Virtual Machine Memory abend Hi s390x Gurus I´m new to Linux on z and we are conducting a POC test of Linux Red Hat with Oracle running under z/VM 5.4 RSU 1003 and a z/10 BC model A00 (IFL Only). If linux virtual machine is defined with 64G in directory we got an abend during startup (see below). Doing some tests I found that I can define it until 59G in directory (60794036k from TOP linux command) and it will startup correctly. My questions are: 1 - Is this a limitation of linux s390x or Red Hat distribution? 2 - Is this a linux s390x bug or Red Hat distribution? 3 - How can I circunvent this so we can continue with POC (Proof Of Concept)? Thanks in advance for all hints and tips about. 00: Booting default (2.6.18-194.8.1.el5)... Linux version 2.6.18-194.8.1.el5 (mockbu...@s390-002.build.bos.redhat.com) (gcc version 4.1.2 20080704 (Red Hat 4.1.2-48)) #1 SMP Wed Jun 23 11:09:16 EDT 2010 We are running under VM (64 bit mode) Detected 3 CPU's Boot cpu address 0 Built 1 zonelists. Total pages: 16777216 Kernel command line: root=LABEL=/ BOOT_IMAGE=0 PID hash table entries: 4096 (order: 12, 32768 bytes) Dentry cache hash table entries: 8388608 (order: 14, 67108864 bytes) Inode-cache hash table entries: 4194304 (order: 13, 33554432 bytes) *Memory: 65951564k/67108864k available* (3414k kernel code, 0k reserved, 2256k dat a, 136k init) Write protected kernel read-only data: 0x356000 - 0x409fff Calibrating delay loop... 2981.88 BogoMIPS (lpj=14909440) Security Framework v1.0.0 initialized SELinux: Initializing. selinux_register_security: Registering secondary module capability Capability LSM initialized as secondary Mount-cache hash table entries: 256 cpu 0 phys_idx=0 vers=FF ident=01F2D6 machine=2098 unused=8000 cpu 1 phys_idx=1 vers=FF ident=01F2D6 machine=2098 unused=8000 cpu 2 phys_idx=2 vers=FF ident=01F2D6 machine=2098 unused=8000 Brought up 3 CPUs migration_cost=1000 checking if image is initramfs...it isn't (bad gzip magic numbers); looks like a n initrd Freeing initrd memory: 2759k freed list_del corruption. prev-next should be 8001bff0, but was 8001 c840 kernel BUG at lib/list_debug.c:65! illegal operation: 0001 Ý#1¨ CPU: 0 Not tainted 2.6.18-194.8.1.el5 #1 Process swapper (pid: 1, task: c611f788, ksp: c6123b10) Krnl PSW : 040400018000 002685d6 (list_del+0x9e/0xcc) Krnl GPRS: 0015 c6123cb8 0026 0400 0012a83e 0733 000a 0050e400 0001 8001bf90 8001bff0 8001bfce 00369878 002685d2 c6123d10 Krnl Code: d2 07 10 08 20 08 e3 10 d0 08 00 04 e3 10 20 08 00 24 e3 10 Call Trace: (Ý002685d2¨ list_del+0x9a/0xcc) Ý0017820a¨ free_pages_bulk+0x9e/0x34c Ý0017868a¨ free_hot_cold_page+0x1d2/0x1f4 Ý001009c0¨ free_initrd_mem+0x8c/0xc8 Ý005944ee¨ free_initrd+0xba/0xe4 Ý0058e324¨ init+0x1a0/0x32c Ý0010558e¨ kernel_thread_starter+0x6/0xc Ý00105588¨ kernel_thread_starter+0x0/0xc 0Kernel panic - not syncing: Fatal exception: panic_on_oops 01: HCPGSP2629I The virtual machine is placed in CP mode due to a SIGP stop from CPU 00. 02: HCPGSP2629I The virtual machine is placed in CP mode due to a SIGP stop from CPU 00. 00:
Re: z/VM RedHat Virtual Machine Memory abend
Well that may be a problem VM always needs a little XSTORE unlike MVS and because you are trying to allocate a guest with more memory than you have Real Memory to support than VM will need someplace to Swap. How many Paging volumes do you have and what are their sizes. Also don't think that a WAS server on a zSeries box will need that much Storage. I would start him off with 32 GB maybe but give him some VDISK SWAP Space. Other s on this List can help with that and there is a Redpaper on setting up WebSphere on zLinux I attached it here, but if it doesn't make it search for Linux on IBM zSeries and S/390: z/VM Configuration for WebSphere Deployments Larry Davis From: The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] On Behalf Of Carlos Bodra - Pessoal Sent: Wednesday, April 20, 2011 7:33 PM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: z/VM RedHat Virtual Machine Memory abend q stor STORAGE = 48G CONFIGURED = 48G INC = 128M STANDBY = 0 RESERVED = 0 Ready; T=0.01/0.01 20:33:09 No xstore defined. Carlos Bodra IBM Certified Specialist System z Sao Paulo - Brazil Em 20/04/2011 20:04, Davis, Larry (National VM/VSE Capability) escreveu: What is your Hardware Memory configuration for Main Storage and XSTORE for VM Larry Davis From: The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] On Behalf Of Carlos Bodra - Pessoal Sent: Wednesday, April 20, 2011 6:39 PM To: IBMVM@LISTSERV.UARK.EDUmailto:IBMVM@LISTSERV.UARK.EDU Subject: Re: z/VM RedHat Virtual Machine Memory abend Larry, We are running it z/VM 5.4 RSU 1003 (lastest), but problem is connected to Linux, because I changed MAINT user memory to 128GB and all runs fine. This machine has no CP´s just IFL´s processors. Carlos Bodra IBM Certified Specialist System z Sao Paulo - Brazil Em 20/04/2011 19:24, Davis, Larry (National VM/VSE Capability) escreveu: Are you Running VM on this or zLinux only on an LPAR? Larry Davis From: The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] On Behalf Of Carlos Bodra - Pessoal Sent: Wednesday, April 20, 2011 6:19 PM To: IBMVM@LISTSERV.UARK.EDUmailto:IBMVM@LISTSERV.UARK.EDU Subject: z/VM RedHat Virtual Machine Memory abend Hi s390x Gurus I´m new to Linux on z and we are conducting a POC test of Linux Red Hat with Oracle running under z/VM 5.4 RSU 1003 and a z/10 BC model A00 (IFL Only). If linux virtual machine is defined with 64G in directory we got an abend during startup (see below). Doing some tests I found that I can define it until 59G in directory (60794036k from TOP linux command) and it will startup correctly. My questions are: 1 - Is this a limitation of linux s390x or Red Hat distribution? 2 - Is this a linux s390x bug or Red Hat distribution? 3 - How can I circunvent this so we can continue with POC (Proof Of Concept)? Thanks in advance for all hints and tips about. 00: Booting default (2.6.18-194.8.1.el5)... Linux version 2.6.18-194.8.1.el5 (mockbu...@s390-002.build.bos.redhat.commailto:mockbu...@s390-002.build.bos.redhat.com) (gcc version 4.1.2 20080704 (Red Hat 4.1.2-48)) #1 SMP Wed Jun 23 11:09:16 EDT 2010 We are running under VM (64 bit mode) Detected 3 CPU's Boot cpu address 0 Built 1 zonelists. Total pages: 16777216 Kernel command line: root=LABEL=/ BOOT_IMAGE=0 PID hash table entries: 4096 (order: 12, 32768 bytes) Dentry cache hash table entries: 8388608 (order: 14, 67108864 bytes) Inode-cache hash table entries: 4194304 (order: 13, 33554432 bytes) Memory: 65951564k/67108864k available (3414k kernel code, 0k reserved, 2256k dat a, 136k init) Write protected kernel read-only data: 0x356000 - 0x409fff Calibrating delay loop... 2981.88 BogoMIPS (lpj=14909440) Security Framework v1.0.0 initialized SELinux: Initializing. selinux_register_security: Registering secondary module capability Capability LSM initialized as secondary Mount-cache hash table entries: 256 cpu 0 phys_idx=0 vers=FF ident=01F2D6 machine=2098 unused=8000 cpu 1 phys_idx=1 vers=FF ident=01F2D6 machine=2098 unused=8000 cpu 2 phys_idx=2 vers=FF ident=01F2D6 machine=2098 unused=8000 Brought up 3 CPUs migration_cost=1000 checking if image is initramfs...it isn't (bad gzip magic numbers); looks like a n initrd Freeing initrd memory: 2759k freed list_del corruption. prev-next should be 8001bff0, but was 8001 c840 kernel BUG at lib/list_debug.c:65! illegal operation: 0001 Ý#1¨ CPU: 0 Not tainted 2.6.18-194.8.1.el5 #1 Process swapper (pid: 1, task: c611f788, ksp: c6123b10) Krnl PSW : 040400018000 002685d6 (list_del+0x9e/0xcc) Krnl GPRS: 0015 c6123cb8 0026 0400 0012a83e 0733 000a 0050e400 0001 8001bf90 8001bff0 8001bfce 00369878 002685d2 c6123d10 Krnl Code: d2 07 10 08 20 08 e3 10 d0 08 00 04 e3 10 20 08 00 24 e3 10 Call Trace:
Re: z/VM RedHat Virtual Machine Memory abend
I would also wonder where you came up with that 64G virtual memory requirement. The rules of thumb that apply to intel environments are counterproductive in the Z environment. I hope our Velocity friends will expound at length about that. From: The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] On Behalf Of Davis, Larry (National VM/VSE Capability) Sent: Wednesday, April 20, 2011 7:55 PM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: z/VM RedHat Virtual Machine Memory abend Well that may be a problem VM always needs a little XSTORE unlike MVS and because you are trying to allocate a guest with more memory than you have Real Memory to support than VM will need someplace to Swap. How many Paging volumes do you have and what are their sizes. Also don't think that a WAS server on a zSeries box will need that much Storage. I would start him off with 32 GB maybe but give him some VDISK SWAP Space. Other s on this List can help with that and there is a Redpaper on setting up WebSphere on zLinux I attached it here, but if it doesn't make it search for Linux on IBM zSeries and S/390: z/VM Configuration for WebSphere Deployments Larry Davis From: The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] On Behalf Of Carlos Bodra - Pessoal Sent: Wednesday, April 20, 2011 7:33 PM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: z/VM RedHat Virtual Machine Memory abend q stor STORAGE = 48G CONFIGURED = 48G INC = 128M STANDBY = 0 RESERVED = 0 Ready; T=0.01/0.01 20:33:09 No xstore defined. Carlos Bodra IBM Certified Specialist System z Sao Paulo - Brazil Em 20/04/2011 20:04, Davis, Larry (National VM/VSE Capability) escreveu: What is your Hardware Memory configuration for Main Storage and XSTORE for VM Larry Davis From: The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] On Behalf Of Carlos Bodra - Pessoal Sent: Wednesday, April 20, 2011 6:39 PM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: z/VM RedHat Virtual Machine Memory abend Larry, We are running it z/VM 5.4 RSU 1003 (lastest), but problem is connected to Linux, because I changed MAINT user memory to 128GB and all runs fine. This machine has no CP´s just IFL´s processors. Carlos Bodra IBM Certified Specialist System z Sao Paulo - Brazil Em 20/04/2011 19:24, Davis, Larry (National VM/VSE Capability) escreveu: Are you Running VM on this or zLinux only on an LPAR? Larry Davis From: The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] On Behalf Of Carlos Bodra - Pessoal Sent: Wednesday, April 20, 2011 6:19 PM To: IBMVM@LISTSERV.UARK.EDU Subject: z/VM RedHat Virtual Machine Memory abend Hi s390x Gurus I´m new to Linux on z and we are conducting a POC test of Linux Red Hat with Oracle running under z/VM 5.4 RSU 1003 and a z/10 BC model A00 (IFL Only). If linux virtual machine is defined with 64G in directory we got an abend during startup (see below). Doing some tests I found that I can define it until 59G in directory (60794036k from TOP linux command) and it will startup correctly. My questions are: 1 - Is this a limitation of linux s390x or Red Hat distribution? 2 - Is this a linux s390x bug or Red Hat distribution? 3 - How can I circunvent this so we can continue with POC (Proof Of Concept)? Thanks in advance for all hints and tips about. 00: Booting default (2.6.18-194.8.1.el5)... Linux version 2.6.18-194.8.1.el5 (mockbu...@s390-002.build.bos.redhat.com) (gcc version 4.1.2 20080704 (Red Hat 4.1.2-48)) #1 SMP Wed Jun 23 11:09:16 EDT 2010 We are running under VM (64 bit mode) Detected 3 CPU's Boot cpu address 0 Built 1 zonelists. Total pages: 16777216 Kernel command line: root=LABEL=/ BOOT_IMAGE=0 PID hash table entries: 4096 (order: 12, 32768 bytes) Dentry cache hash table entries: 8388608 (order: 14, 67108864 bytes) Inode-cache hash table entries: 4194304 (order: 13, 33554432 bytes) Memory: 65951564k/67108864k available (3414k kernel code, 0k reserved, 2256k dat a, 136k init) Write protected kernel read-only data: 0x356000 - 0x409fff Calibrating delay loop... 2981.88 BogoMIPS (lpj=14909440) Security Framework v1.0.0 initialized SELinux: Initializing. selinux_register_security: Registering secondary module capability
Re: z/VM RedHat Virtual Machine Memory abend
I didn't say anything at first because clearly there IS a problem. Linux is crashing when presented with 64G of storage, but not when presented with 59G, per what Carlos said at the start. This is not likely a VM or hardware problem. True, the req is probably ROT and not based on actual application needs but on platform assumptions. If 59G IPLs, then run the POC with that and see what happens. In production you will almost certainly want to REDUCE the memory given to each v-machine. 59G is typically too much, sometimes *way* too much. Virtualized Linux has been around for more than ten years, but many consultants and app vendors still don't understand. -- Rick, Velocity friend; On Apr 20, 2011 8:04 PM, Quay, Jonathan (IHG) jonathan.q...@ihg.com wrote:
Re: z/VM RedHat Virtual Machine Memory abend
Check the amount of paging space you have defined for the VM system. You can define a virtual machine far bigger than you can actually use if you have insufficient paging space. The guest will work for a while, until it tries to access a page that can't be supported with backing store, and you get weird memory problems like that. Also, seriously ask why the virtual machine needs to be so large. If it's because that's the way it is on the distributed platform, that's going to do more harm than good - I/O avoidance is not as important on this platform as it is elsewhere (the biggest reason for huge memory sizes). Start with 1 or 2G, reduce the size of SGA, and make sure you use VDISK for swap. Also make sure you have some XSTORE defined if you're going to have virtual machines that big - you're going to need it for setting up a paging hierarchy that can sustain moving
Re: z/VM RedHat Virtual Machine Memory abend
Check the amount of paging space you have defined for the VM system. Is this a brand new VM install right out of the box? If so, then this is most likely to be the problem. 48G of real, plus the default paging areas in a brand new VM install add up to just about 52G or so, depending on whether you used mod 3 or mod 9s. It works for MAINT because CMS is extremely memory efficient; it doesn't require that every page in the virtual machine definition be actually present when it IPLs, and it touches only what it actually needs. Linux touches every page at some point, so you need enough paging space to support the total size of all the virtual machines you define, plus a little bit of insurance. Add at least 3-4 mod 9 or mod 27s as paging space and see if the problem goes away.
FTPS using zVM FTP client ?
We have a vendor that we need to ftp files to from our zVM 5.4 system. The vendor says we need to use FTPS over IMPLICIT TLS/SSL. I have been reading the TCPIP Users Guide and it appears the this is possible from our zVM 5.4 system if I configure and use the SECURECONTROL and SECUREDATA statements in a FTP DATA file, which I have done. So far I have not had any luck connecting to them. If anyone else has done something similar can you tell me if I am missing something? Thank you in advance... Bill Pettit
Re: FTPS using zVM FTP client ?
The ftp client supports only negotiated SSL/TLS per RFC 4217. Regards, Alan Altmark IBM Lab Services - Sent from my BlackBerry Handheld. - Original Message - From: Bill Pettit [bill.pet...@ormutual.com] Sent: 04/20/2011 02:11 PM MST To: IBMVM@LISTSERV.UARK.EDU Subject: [IBMVM] FTPS using zVM FTP client ? We have a vendor that we need to ftp files to from our zVM 5.4 system. The vendor says we need to use FTPS over IMPLICIT TLS/SSL. I have been reading the TCPIP Users Guide and it appears the this is possible from our zVM 5.4 system if I configure and use the SECURECONTROL and SECUREDATA statements in a FTP DATA file, which I have done. So far I have not had any luck connecting to them. If anyone else has done something similar can you tell me if I am missing something? Thank you in advance... Bill Pettit
Re: Detaching A disk from z/Linux guest dynamically
If you have access to the user's LOGONBY profile in the SURROGAT class, you can issue the FOR command. I didn't think there was any point in requiring separate authorization for LOGON BY and FOR. And with or without RACF, if you are the current secuser you can issue FOR. (Yes, the ESMs provide more functionality than CP by himself.) Regards, Alan Altmark IBM Lab Services - Sent from my BlackBerry Handheld. - Original Message - From: Martin, Terry R. (CMS/CTR) (CTR) [terry.mar...@cms.hhs.gov] Sent: 04/20/2011 04:13 PM AST To: IBMVM@LISTSERV.UARK.EDU Subject: Re: [IBMVM] Detaching A disk from z/Linux guest dynamically Thanks Tom I was just about to ask this question because I have a bunch of guests that I need to change. Now I tried the FOR command and received this: HCPFOR070E - Basically it is an authorization issue with the FOR command. We are running RACF here so do you know what the profile would be and what RACF class would need to be activated to define and permit this resource? Can I also do this via the SECUSER command? Thank You, Terry Martin Lockheed Martin CMS - CITIC 3300 Lord Baltimore Drive, Suite 200, 21244 Engineering Computing Mainframe Support Cell - 443 632-4191 From: The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] On Behalf Of Tom Huegel Sent: Wednesday, April 20, 2011 2:37 PM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: Detaching A disk from z/Linux guest dynamically Since these are CP commands use FOR command and avoid logging on the LINUX machine. FOR linuxname CMD DET 191 FOR linuxname CMD LINK * 191 191 MR On Wed, Apr 20, 2011 at 8:45 AM, David Boyes dbo...@sinenomine.netmailto:dbo...@sinenomine.net wrote: If the 191 is only used at Linux boot, you can change the directory entry and then login to the VM userid running the Linux system and: BEGIN (if you get a CP READ) #CP DET 191 #CP LINK * 191 191 MR #CP DISC (assuming your LINEND char is #) If you are actually using the disk during runtime, then it's a lot safer to bounce the guest. -- db From: The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDUmailto:IBMVM@LISTSERV.UARK.EDU] On Behalf Of Martin, Terry R. (CMS/CTR) (CTR) Sent: Wednesday, April 20, 2011 10:22 AM To: IBMVM@LISTSERV.UARK.EDUmailto:IBMVM@LISTSERV.UARK.EDU Subject: Detaching A disk from z/Linux guest dynamically Hi I have a copy of the DASD volume where the A (191) disk resides for a specific z/Linux guest. I want to point the guest to the new copied volume from the one it is currently using without bringing the guest down. Is there a way to do this? Thank You, Terry Martin Lockheed Martin CMS - CITIC 3300 Lord Baltimore Drive, Suite 200, 21244 Engineering Computing Mainframe Support Cell - 443 632-4191tel:443%20632-4191
Re: z/VM RedHat Virtual Machine Memory abend
Thanks a lot for hints. Barton, and others, I will redifine storage areas to get xstore. I can add more 2 or 3 3390-3 page volumes. Today there is only one volume for page and one for spool. Please keep in mind, that this is a no production z10 installed in our data center just for POC tests, so I can change definitions very very fast. I will do changes next monday and return here with results. Thanks again and Happy Easter for all!!! Carlos Bodra On Qua 20/04/11 22:52 , David Boyes dbo...@sinenomine.net sent: Check the amount of paging space you have defined for the VM system. Is this a brand new VM install right out of the box? If so, then this is most likely to be the problem. 48G of real, plus the default paging areas in a brand new VM install add up to just about 52G or so, depending on whether you used mod 3 or mod 9s. It works for MAINT because CMS is extremely memory efficient; it doesn’t require that every page in the virtual machine definition be actually present when it IPLs, and it touches only what it actually needs. Linux touches every page at some point, so you need enough paging space to support the total size of all the virtual machines you define, plus a little bit of insurance. Add at least 3-4 mod 9 or mod 27s as paging space and see if the problem goes away.
