Given the investment in hardware and software, it seems natural to believe that
this site will want high availability.
Odds of high availability should be significantly improved when z/VM Single
System Image (SSI)eventually reaches General Availability in the unannounced
future. As SSI gradually becomes more full-featured, you should be able to
move most guest Linux for System z servers between z/VM SSI members (as Marcy
said, a max of 4 systems in an SSI environment) without any outage -- presuming
the prereq hardware.
By building your systems in multiple LPARs now, you will become familiar with
the intricacies of installing, maintaining, running, and upgrading multiple
systems ahead of the curve. And if the CECs are located in different data
centers (but 'close enough') you get a pretty nifty D.R. capability right off
the bat!
Mike Walter
Hewitt Associates
(Sent from the wee keyboard on a Blackberry.)
----- Original Message -----
From: "Leland Lucius" [lluc...@homerow.net]
Sent: 12/03/2009 06:45 PM CST
To: IBMVM@LISTSERV.UARK.EDU
Subject: Re: WWBD - One large VM LPAR or multiple smaller ones?
Marcy Cortes wrote:
Isn't there a 256G limit to a z/VM lpar?
Yepper. I just threw those number out to make the math easier. ;-)
Anyway, I'd split it to 2 or 3 as well. It will make your life easier for VM
maintenance if you have servers that can't go down much.
That's exactly what I was thinking. I just wanted to make sure I wasn't
being more of an idiot than normal. :-)
Thanks much,
Leland
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