He can share the storage if the Linux guest is a virtual machine, but he won't be able to use the IFL AND his general purpose CP(s) in the same LPAR. He'd need a z10 with an LPAR configured with the new ZVM support to mix/match different processors in the same LPAR. This was actually our justification for getting a z10, the ability to mix IFL's and CP's in the same LPAR. :) PS: How much storage you need for your Linux LPAR depends on what you want to use Linux for, but I've run production Linux systems (SuSE, RedHat and Debian) in just a few hundred MB and they ran Apache web servers, LVM, DB2/Connect, mail servers and a ton of other stuff with no problems. :) -Mike
-----Original Message----- From: The IBM z/VM Operating System [mailto:ib...@listserv.uark.edu] On Behalf Of Scott Rohling Sent: Monday, September 14, 2009 10:01 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: How much memory? It will depend on what your POC encompasses.. how many Linux guests? What software/middleware?. You might want to consider a 2nd level guest rather than building a separate LPAR -- that way you can manage things under a single zVM and dynamically change things (give your 2nd level zVM more storage, for example) much more easily... Scott On Mon, Sep 14, 2009 at 7:52 AM, Vince Getgood <vincent.getg...@xchanging.com> wrote: Hi all, I'm not a VM expert, so forgive me if this seems a newbie quetion. I have a z800 running z/VM, which has two production z/OS guests, and the usual collection of CMS guests (TCPIP / OPERATOR etc). We discovered recently that the z800 has an IFL (long story - don't ask!) and would like to steal some of the 8GB currently allocated to VM, to run up a VM / Linux LPAR for a POC. The two z/OS guests are defined at 256MB & 512MB (Bill Gates, are you watching??), and don't page. In your most esteemed opinion, what could I steal from the VM LPAR without hurting it's and the guests performance / making it page? Personally, I think 2GB would be enough. Comments and opinions welcome.
