In our case, we're talking about going from 76 GB to 140 GB. We're trying to stay ahead of requirements, so suggestions such as "look at your performance monitor" don't really work. The workload that will use the additional capacity hasn't arrived, yet. I need to submit my disk requirements for paging to our Storage team, because it takes them a month or two to add the disk. I can't afford to wait until performance gets bad.
Right now, this system has about 30 Linux guests, all running WAS. Most of them have 6 GB of virtual storage. This is a development system, so it's actually larger than our production systems. Developers like to have several levels of testing (UAT, SIT, etc) for each production server. One of the drivers for the upgrade is a proposal to add a 28 GB Linux guest to development, and one to each of two production systems. The wisdom of having a single guest that large remains to be seen, as does the actual requirement for that much storage. I know about SET REORDER and all that. If they really do need that much storage, they might end up with multiple smaller guests. Dennis "Decision" is not a verb. -----Original Message----- From: The IBM z/VM Operating System [mailto:ib...@listserv.uark.edu] On Behalf Of Gary M. Dennis Sent: Thursday, September 30, 2010 08:07 To: IBMVM@LISTSERV.UARK.EDU Subject: Re: [IBMVM] Mixed page volume sizes Soooooooo if you had guests averaging 18GB each, and you follow recommendations for page volume utilization (50% as I understand it), Mod 9s would yield around 4GB useable page space each. That would give you 100 such images per VM ...... (250 volumes times the 4GB/volume divided by 18GB per image)? I know this rough but am I headed in the right direction? I'm making the assumption (an this may be incorrect) that the available real storage backing could support virtual requirements. On 9/30/10 9:24 AM, "Rob van der Heij" <rvdh...@gmail.com> wrote: > On Thu, Sep 30, 2010 at 3:39 PM, George Henke/NYLIC > <george_he...@newyorklife.com> wrote: >> >> Sorry for my ignorance and naivete, but I am simply staggered at the volume >> of page volumes of whatever size, 100 - 240. >> >> I have just a Dev Test z/VM environment with 2 measly 3390-3's for Paging. >> >> Granted, I am running only 5 z/OS vm's and 3 Linux vm's. > > My test system does not have that either. But think of 250G real > memory and some 100 Linux guests of 4-10 GB each, all running > enterprise applications. > > | Rob > --. .- .-. -.-- Gary Dennis Mantissa Corporation 1121 Edenton Street Birmingham, Alabama 35242-9257 0 ... living between the zeros... 0 p: 205.968-3942 m: 205.218-3937 f: 205.968.3932 gary.den...@mantissa.com http://www.mantissa.com http://www.idovos.com