We also run two z9 CECs with a zVM LPAR in each, 2 IFLs each and 16gig of
storage each. Both run a vSwitch and share a subnet (key to being able to
move images from one LPAR to the other). Both have access to all of the
images¹ DASD. We run a load on both, but when one of the zVM¹s or CECs must
come down, we can bring down the Linux guests in that LPAR and immediately
bring them up in the other LPAR.
We run zVM CSE in order to keep an image from trying to log in and come up
on both LPARs at the same time (truly the kiss of death; well tested and
proven here). This also allows us to run DirMaint and share the CP Directory
between the two LPARs.
It¹s not true HA, but then most of the applications that the users request
³High Availability² for aren¹t ready themselves for a true HA environment
either.
NOTE TO IBM: It would be sweet, given that CSE is running and there¹s a
connection between the two LPARs, if you could migrate a live, running Linux
image / VM userid from one running LPAR to another transparently. VMWare
does this on Intel boxes... Let¹s catch up.
--
.~. Robert P. Nix Mayo Foundation
/V\ RO-OC-1-13 200 First Street SW
/ ( ) \ 507-284-0844 Rochester, MN 55905
^^-^^ -----
"In theory, theory and practice are the same, but
in practice, theory and practice are different."
> From: Rich Smrcina <[EMAIL PROTECTED]>
> Reply-To: The IBM z/VM Operating System <[email protected]>
> Date: Mon, 22 Jan 2007 14:13:47 -0600
> To: <[email protected]>
> Subject: Re: Keep VM 24X7 365 days
>
> I have a customer with two z9's. They have an identical I/O
> configuration on each machine. If they need to do maintenance on one
> z/VM, they bring down the Linux machines on one system and bring them
> back up on the other system. They essentially have their own hot site,
> it isn't exactly 24X7, but it's real, real close.
>
> Bringing the Linuxes down on one an up on the other can be done in a
> matter of minutes (and not too many of them).
>
> [EMAIL PROTECTED] wrote:
>>
>> We have Linux guests running on VM, DB2connect is running on Linux.
>> The application DB2 Connect requires 24X7 for 365 dsys. We have one VM
>> now.
>> What's the best way to prepare for this. We need to ipl VM for the
>> upgrade, system abends
>> or system config changes. If we create a second VM, how do we switch
>> from one to another VM.
>>
>>
>> Thanks,
>>
>> Ann
>>
>> The information contained in this message may be CONFIDENTIAL and is for the
>> intended addressee only. Any unauthorized use, dissemination of the
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>> intended addressee, please notify the sender immediately and delete this
>> message.
>>
>
> --
> Rich Smrcina
> VM Assist, Inc.
> Phone: 414-491-6001
> Ans Service: 360-715-2467
> rich.smrcina at vmassist.com
>
> Catch the WAVV! http://www.wavv.org
> WAVV 2007 - Green Bay, WI - May 18-22, 2007
