Re: Multiple z/OS under z/VM =xSYSTEM
What's the memory size of each of those 8 virtual machines? Marcy This message may contain confidential and/or privileged information. If you are not the addressee or authorized to receive this for the addressee, you must not use, copy, disclose, or take any action based on this message or any information herein. If you have received this message in error, please advise the sender immediately by reply e-mail and delete this message. Thank you for your cooperation. -Original Message- From: The IBM z/VM Operating System [mailto:ib...@listserv.uark.edu] On Behalf Of Alain Benveniste Sent: Thursday, June 17, 2010 9:54 AM To: IBMVM@LISTSERV.UARK.EDU Subject: [IBMVM] Multiple z/OS under z/VM =xSYSTEM Back from a DR test, the feedback I have from users is that a simple 'ent= er' on z/OS generate a xSYSTEM, short for me, but really embarassing for the users... We run a zVM530 with 8 zOS in 1.8 as guest, 20G real storage, 4000mips. A= ll the DASD are defined as MDISK with MW. I gave access to the 8 processors = for the zOS. MDC is on. No real activity on those partitions. What am I suppo= sed to look at ? I took a look at the DIRMAINT options... Nothing flashing ! = Do I have to consider this behavior as 'normal' ? IS at to see with the reserve/release on DASD, MDISK translation... Any suggestions ? Alain Benveniste
Re: Multiple z/OS under z/VM =xSYSTEM
Marcy The sizes of those zOS under z/VM are exactly the sizes they have in lpar at home... Alain Le 17 juin 2010 à 19:23, Marcy Cortes a écrit : What's the memory size of each of those 8 virtual machines? Marcy This message may contain confidential and/or privileged information. If you are not the addressee or authorized to receive this for the addressee, you must not use, copy, disclose, or take any action based on this message or any information herein. If you have received this message in error, please advise the sender immediately by reply e-mail and delete this message. Thank you for your cooperation. -Original Message- From: The IBM z/VM Operating System [mailto:ib...@listserv.uark.edu] On Behalf Of Alain Benveniste Sent: Thursday, June 17, 2010 9:54 AM To: IBMVM@LISTSERV.UARK.EDU Subject: [IBMVM] Multiple z/OS under z/VM =xSYSTEM Back from a DR test, the feedback I have from users is that a simple 'ent= er' on z/OS generate a xSYSTEM, short for me, but really embarassing for the users... We run a zVM530 with 8 zOS in 1.8 as guest, 20G real storage, 4000mips. A= ll the DASD are defined as MDISK with MW. I gave access to the 8 processors = for the zOS. MDC is on. No real activity on those partitions. What am I suppo= sed to look at ? I took a look at the DIRMAINT options... Nothing flashing ! = Do I have to consider this behavior as 'normal' ? IS at to see with the reserve/release on DASD, MDISK translation... Any suggestions ? Alain Benveniste
Re: Multiple z/OS under z/VM =xSYSTEM
OK, but do they add up to more than 20G? i.e. are you paging? Marcy This message may contain confidential and/or privileged information. If you are not the addressee or authorized to receive this for the addressee, you must not use, copy, disclose, or take any action based on this message or any information herein. If you have received this message in error, please advise the sender immediately by reply e-mail and delete this message. Thank you for your cooperation. -Original Message- From: The IBM z/VM Operating System [mailto:ib...@listserv.uark.edu] On Behalf Of Alain Benveniste Sent: Thursday, June 17, 2010 11:09 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: [IBMVM] Multiple z/OS under z/VM =xSYSTEM Marcy The sizes of those zOS under z/VM are exactly the sizes they have in lpar at home... Alain Le 17 juin 2010 à 19:23, Marcy Cortes a écrit : What's the memory size of each of those 8 virtual machines? Marcy This message may contain confidential and/or privileged information. If you are not the addressee or authorized to receive this for the addressee, you must not use, copy, disclose, or take any action based on this message or any information herein. If you have received this message in error, please advise the sender immediately by reply e-mail and delete this message. Thank you for your cooperation. -Original Message- From: The IBM z/VM Operating System [mailto:ib...@listserv.uark.edu] On Behalf Of Alain Benveniste Sent: Thursday, June 17, 2010 9:54 AM To: IBMVM@LISTSERV.UARK.EDU Subject: [IBMVM] Multiple z/OS under z/VM =xSYSTEM Back from a DR test, the feedback I have from users is that a simple 'ent= er' on z/OS generate a xSYSTEM, short for me, but really embarassing for the users... We run a zVM530 with 8 zOS in 1.8 as guest, 20G real storage, 4000mips. A= ll the DASD are defined as MDISK with MW. I gave access to the 8 processors = for the zOS. MDC is on. No real activity on those partitions. What am I suppo= sed to look at ? I took a look at the DIRMAINT options... Nothing flashing ! = Do I have to consider this behavior as 'normal' ? IS at to see with the reserve/release on DASD, MDISK translation... Any suggestions ? Alain Benveniste
Re: Multiple z/OS under z/VM =xSYSTEM
First, I would not give 8 virtual CPUs for each z/OS guest but rather start with 2 VCPUs and see if the workload demands more. If z/VM only has 8 physical CPUs, you seem to have created a 8:1 virtual/real CPU ratio which could cause significant overhead and possible thrashing. Does z/VM 5.3 have expanded storage allocated as a fast paging device probably allocate 2GB for ES. Is that DASD shared among all z/OS guests? If so, could you show a small sample of how some disks are defined across the guests? Jon Nolting - System z IT Architect (zITA) zChampion IBM US West IMT based near Seattle (206) 587-2244 (Work) - T/L 277-244 (425) 281-5750 (Cell) (206) 587-2244 (Fax) (425) 222-7969 (Home) From: Alain Benveniste a.benveni...@free.fr To: IBMVM@LISTSERV.UARK.EDU Date: 06/17/2010 11:08 AM Subject:Re: Multiple z/OS under z/VM =xSYSTEM Sent by:The IBM z/VM Operating System IBMVM@LISTSERV.UARK.EDU Marcy The sizes of those zOS under z/VM are exactly the sizes they have in lpar at home... Alain Le 17 juin 2010 à 19:23, Marcy Cortes a écrit : What's the memory size of each of those 8 virtual machines? Marcy This message may contain confidential and/or privileged information. If you are not the addressee or authorized to receive this for the addressee, you must not use, copy, disclose, or take any action based on this message or any information herein. If you have received this message in error, please advise the sender immediately by reply e-mail and delete this message. Thank you for your cooperation. -Original Message- From: The IBM z/VM Operating System [mailto:ib...@listserv.uark.edu] On Behalf Of Alain Benveniste Sent: Thursday, June 17, 2010 9:54 AM To: IBMVM@LISTSERV.UARK.EDU Subject: [IBMVM] Multiple z/OS under z/VM =xSYSTEM Back from a DR test, the feedback I have from users is that a simple 'ent= er' on z/OS generate a xSYSTEM, short for me, but really embarassing for the users... We run a zVM530 with 8 zOS in 1.8 as guest, 20G real storage, 4000mips. A= ll the DASD are defined as MDISK with MW. I gave access to the 8 processors = for the zOS. MDC is on. No real activity on those partitions. What am I suppo= sed to look at ? I took a look at the DIRMAINT options... Nothing flashing ! = Do I have to consider this behavior as 'normal' ? IS at to see with the reserve/release on DASD, MDISK translation... Any suggestions ? Alain Benveniste
Re: Multiple z/OS under z/VM =xSYSTEM
The 'biggest one' has less than 2G. 0% paging. Activity was close to zero. Poor activity in the cache too... I checked for the quicdsp option. In place too... DASD array is a DS8000 supersized in ficon. The machine there is a z9 S38 globaly 10 more powerful than the one we have at home. CPU never higher than 10%. Le 17 juin 2010 à 20:11, Marcy Cortes a écrit : OK, but do they add up to more than 20G? i.e. are you paging? Marcy This message may contain confidential and/or privileged information. If you are not the addressee or authorized to receive this for the addressee, you must not use, copy, disclose, or take any action based on this message or any information herein. If you have received this message in error, please advise the sender immediately by reply e-mail and delete this message. Thank you for your cooperation. -Original Message- From: The IBM z/VM Operating System [mailto:ib...@listserv.uark.edu] On Behalf Of Alain Benveniste Sent: Thursday, June 17, 2010 11:09 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: [IBMVM] Multiple z/OS under z/VM =xSYSTEM Marcy The sizes of those zOS under z/VM are exactly the sizes they have in lpar at home... Alain Le 17 juin 2010 à 19:23, Marcy Cortes a écrit : What's the memory size of each of those 8 virtual machines? Marcy This message may contain confidential and/or privileged information. If you are not the addressee or authorized to receive this for the addressee, you must not use, copy, disclose, or take any action based on this message or any information herein. If you have received this message in error, please advise the sender immediately by reply e-mail and delete this message. Thank you for your cooperation. -Original Message- From: The IBM z/VM Operating System [mailto:ib...@listserv.uark.edu] On Behalf Of Alain Benveniste Sent: Thursday, June 17, 2010 9:54 AM To: IBMVM@LISTSERV.UARK.EDU Subject: [IBMVM] Multiple z/OS under z/VM =xSYSTEM Back from a DR test, the feedback I have from users is that a simple 'ent= er' on z/OS generate a xSYSTEM, short for me, but really embarassing for the users... We run a zVM530 with 8 zOS in 1.8 as guest, 20G real storage, 4000mips. A= ll the DASD are defined as MDISK with MW. I gave access to the 8 processors = for the zOS. MDC is on. No real activity on those partitions. What am I suppo= sed to look at ? I took a look at the DIRMAINT options... Nothing flashing ! = Do I have to consider this behavior as 'normal' ? IS at to see with the reserve/release on DASD, MDISK translation... Any suggestions ? Alain Benveniste
Re: Multiple z/OS under z/VM =xSYSTEM
Jon, I have checked if I hadn't define more processors than I have in reality. I have tested to give just 1 proc for each partition. I got the same result. Should I test 2 ? All the MDISK are defined in a nolog machine this way : MDISK C000 0 1113, 2655, 3339, 10017 volser MWV. I didn't code the famous 0 END because 3380 emulated on DS8000 shows 3339 cylinders. All the zOS have a link coded this way : LINK user C000 C000 MW Alain Le 17 juin 2010 à 20:19, Jonathan R Nolting a écrit : First, I would not give 8 virtual CPUs for each z/OS guest but rather start with 2 VCPUs and see if the workload demands more. If z/VM only has 8 physical CPUs, you seem to have created a 8:1 virtual/real CPU ratio which could cause significant overhead and possible thrashing. Does z/VM 5.3 have expanded storage allocated as a fast paging device probably allocate 2GB for ES. Is that DASD shared among all z/OS guests? If so, could you show a small sample of how some disks are defined across the guests? Jon Nolting - System z IT Architect (zITA) zChampion IBM US West IMT based near Seattle (206) 587-2244 (Work) - T/L 277-244 (425) 281-5750 (Cell) (206) 587-2244 (Fax) (425) 222-7969 (Home) Alain Benveniste ---06/17/2010 11:08:57 AM---Marcy The sizes of those zOS under z/VM are exactly the sizes they have in lpar at home... From: Alain Benveniste a.benveni...@free.fr To: IBMVM@LISTSERV.UARK.EDU Date: 06/17/2010 11:08 AM Subject: Re: Multiple z/OS under z/VM =xSYSTEM Sent by: The IBM z/VM Operating System IBMVM@LISTSERV.UARK.EDU Marcy The sizes of those zOS under z/VM are exactly the sizes they have in lpar at home... Alain Le 17 juin 2010 à 19:23, Marcy Cortes a écrit : What's the memory size of each of those 8 virtual machines? Marcy This message may contain confidential and/or privileged information. If you are not the addressee or authorized to receive this for the addressee, you must not use, copy, disclose, or take any action based on this message or any information herein. If you have received this message in error, please advise the sender immediately by reply e-mail and delete this message. Thank you for your cooperation. -Original Message- From: The IBM z/VM Operating System [mailto:ib...@listserv.uark.edu] On Behalf Of Alain Benveniste Sent: Thursday, June 17, 2010 9:54 AM To: IBMVM@LISTSERV.UARK.EDU Subject: [IBMVM] Multiple z/OS under z/VM =xSYSTEM Back from a DR test, the feedback I have from users is that a simple 'ent= er' on z/OS generate a xSYSTEM, short for me, but really embarassing for the users... We run a zVM530 with 8 zOS in 1.8 as guest, 20G real storage, 4000mips. A= ll the DASD are defined as MDISK with MW. I gave access to the 8 processors = for the zOS. MDC is on. No real activity on those partitions. What am I suppo= sed to look at ? I took a look at the DIRMAINT options... Nothing flashing ! = Do I have to consider this behavior as 'normal' ? IS at to see with the reserve/release on DASD, MDISK translation... Any suggestions ? Alain Benveniste
Re: Multiple z/OS under z/VM =xSYSTEM
The z/VM has no expanded storage defined. You're right on this ! The problem revealed by the users just tickle my mind in the fact that : could it be possible that is has nothing to see with my config but rather with the 3270 emulator or something around with the network ? a slow display on the screen ? Le 17 juin 2010 à 20:19, Jonathan R Nolting a écrit : First, I would not give 8 virtual CPUs for each z/OS guest but rather start with 2 VCPUs and see if the workload demands more. If z/VM only has 8 physical CPUs, you seem to have created a 8:1 virtual/real CPU ratio which could cause significant overhead and possible thrashing. Does z/VM 5.3 have expanded storage allocated as a fast paging device probably allocate 2GB for ES. Is that DASD shared among all z/OS guests? If so, could you show a small sample of how some disks are defined across the guests? Jon Nolting - System z IT Architect (zITA) zChampion IBM US West IMT based near Seattle (206) 587-2244 (Work) - T/L 277-244 (425) 281-5750 (Cell) (206) 587-2244 (Fax) (425) 222-7969 (Home) Alain Benveniste ---06/17/2010 11:08:57 AM---Marcy The sizes of those zOS under z/VM are exactly the sizes they have in lpar at home... From: Alain Benveniste a.benveni...@free.fr To: IBMVM@LISTSERV.UARK.EDU Date: 06/17/2010 11:08 AM Subject: Re: Multiple z/OS under z/VM =xSYSTEM Sent by: The IBM z/VM Operating System IBMVM@LISTSERV.UARK.EDU Marcy The sizes of those zOS under z/VM are exactly the sizes they have in lpar at home... Alain Le 17 juin 2010 à 19:23, Marcy Cortes a écrit : What's the memory size of each of those 8 virtual machines? Marcy This message may contain confidential and/or privileged information. If you are not the addressee or authorized to receive this for the addressee, you must not use, copy, disclose, or take any action based on this message or any information herein. If you have received this message in error, please advise the sender immediately by reply e-mail and delete this message. Thank you for your cooperation. -Original Message- From: The IBM z/VM Operating System [mailto:ib...@listserv.uark.edu] On Behalf Of Alain Benveniste Sent: Thursday, June 17, 2010 9:54 AM To: IBMVM@LISTSERV.UARK.EDU Subject: [IBMVM] Multiple z/OS under z/VM =xSYSTEM Back from a DR test, the feedback I have from users is that a simple 'ent= er' on z/OS generate a xSYSTEM, short for me, but really embarassing for the users... We run a zVM530 with 8 zOS in 1.8 as guest, 20G real storage, 4000mips. A= ll the DASD are defined as MDISK with MW. I gave access to the 8 processors = for the zOS. MDC is on. No real activity on those partitions. What am I suppo= sed to look at ? I took a look at the DIRMAINT options... Nothing flashing ! = Do I have to consider this behavior as 'normal' ? IS at to see with the reserve/release on DASD, MDISK translation... Any suggestions ? Alain Benveniste
Re: Multiple z/OS under z/VM =xSYSTEM
That is possible. Did you run any jobs on z/OS? How'd they run? Marcy From: The IBM z/VM Operating System [mailto:ib...@listserv.uark.edu] On Behalf Of Alain Benveniste Sent: Thursday, June 17, 2010 11:37 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: [IBMVM] Multiple z/OS under z/VM =xSYSTEM The z/VM has no expanded storage defined. You're right on this ! The problem revealed by the users just tickle my mind in the fact that : could it be possible that is has nothing to see with my config but rather with the 3270 emulator or something around with the network ? a slow display on the screen ?
Re: Multiple z/OS under z/VM =xSYSTEM
Marcy We didn't run any Jobs. We just played the minimal to officialize the doc. The few batch we do was to restore our VTS. So, only batch tapes... Time was good ! Envoyé de mon iPhone Le 17 juin 2010 à 20:45, Marcy Cortes marcy.d.cor...@wellsfargo.com a écrit : That is possible. Did you run any jobs on z/OS? How'd they run? Marcy From: The IBM z/VM Operating System [mailto:ib...@listserv.uark.edu] On Behalf Of Alain Benveniste Sent: Thursday, June 17, 2010 11:37 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: [IBMVM] Multiple z/OS under z/VM =xSYSTEM The z/VM has no expanded storage defined. You're right on this ! The problem revealed by the users just tickle my mind in the fact that : could it be possible that is has nothing to see with my config but rather with the 3270 emulator or something around with the network ? a slow display on the screen ?
Re: Multiple z/OS under z/VM =xSYSTEM
On Thu, Jun 17, 2010 at 8:37 PM, Alain Benveniste a.benveni...@free.fr wrote: The z/VM has no expanded storage defined. You're right on this ! The problem revealed by the users just tickle my mind in the fact that : could it be possible that is has nothing to see with my config but rather with the 3270 emulator or something around with the network ? a slow display on the screen ? Once we're done guessing, it's time for my obvious question: what did the performance monitor say? If I were offering a D/R solution with z/VM hosting a bunch of z/OS guests, I would find it enough challenging to justify having a performance monitor and related expertise... Since you say there was no paging, the question whether you have expanded storage is not very relevant. There's lots of other questions that could be answered by monitor data. And I fear it's unlikely you get them answered without. Rob ( I've never refused to look at someones monitor data... ) -- Rob van der Heij Velocity Software http://www.velocitysoftware.com/
Re: Multiple z/OS under z/VM =xSYSTEM
I didn't catch the beginning of this subject, so I might be way off. But... Was set srm stor(?) 300 300 300 or something similar discussed? A novice VM user and many large guests...a storage problem. Tom Duerbusch THD Consulting Sent via BlackBerry by ATT -Original Message- From: Rob van der Heij rvdh...@velocitysoftware.com Date: Thu, 17 Jun 2010 23:02:29 To: IBMVM@LISTSERV.UARK.EDU Subject: Re: Multiple z/OS under z/VM =xSYSTEM On Thu, Jun 17, 2010 at 8:37 PM, Alain Benveniste a.benveni...@free.fr wrote: The z/VM has no expanded storage defined. You're right on this ! The problem revealed by the users just tickle my mind in the fact that : could it be possible that is has nothing to see with my config but rather with the 3270 emulator or something around with the network ? a slow display on the screen ? Once we're done guessing, it's time for my obvious question: what did the performance monitor say? If I were offering a D/R solution with z/VM hosting a bunch of z/OS guests, I would find it enough challenging to justify having a performance monitor and related expertise... Since you say there was no paging, the question whether you have expanded storage is not very relevant. There's lots of other questions that could be answered by monitor data. And I fear it's unlikely you get them answered without. Rob ( I've never refused to look at someones monitor data... ) -- Rob van der Heij Velocity Software http://www.velocitysoftware.com/
