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 <[email protected]> > > To: > [email protected] > > Date: > 06/17/2010 11:08 AM > > Subject: > Re: Multiple z/OS under z/VM =xSYSTEM > > Sent by: > The IBM z/VM Operating System <[email protected]> > > > > 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:[email protected]] On > > Behalf Of Alain Benveniste > > Sent: Thursday, June 17, 2010 9:54 AM > > To: [email protected] > > 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 > >
