SUMMARY: Relocating a cluster
rob.leadbeater_at_lynx.co.uk
Date: 03/26/04
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Date: Fri, 26 Mar 2004 11:18:51 +0000 To: tru64-unix-managers@ornl.gov
Hi managers,
Thanks to Udo de Boer for pointing me to a documentation update on HP's
website.
Essentially the cluster will panic.
To quote the relevant section from the docs at:
http://h30097.www3.hp.com/docs/updates/TCR51B/TITLE.HTM
"If you configure a cluster with a single rail Memory Channel in standard
hub mode and the hub fails, or is powered off, every cluster member
panics. They panic because no member can see any of the other cluster
members over the Memory Channel interface. A quorum disk does not help in
this case, because no system is given the opportunity to obtain ownership
of the quorum disk and survive. "
It looks like another weekend job :-(
Cheers,
Rob
> -----Original Message-----
> From: rob.leadbeater@lynx.co.uk
> Sent: 26 March 2004 09:39
> To: tru64-unix-managers@ornl.gov
> Subject: Relocating a cluster
>
>
> Hi managers,
>
> I'm in the process of relocating a live cluster into a different rack.
>
> The cluster consists of a couple of DS25's running v5.1B,
> using a single
> memory channel hub as the cluster transport.
>
> I know that shutting down one node of the cluster will be OK,
> but I just
> want to sanity check that powering off the memory channel hub won't
> affect the remaining node whilst I move things around.
>
> Cheers,
>
> Rob
>
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