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Re: [Xen-users] Debian Etch Xen Cluster (DRBD, GNBD, OCFS2, iSCSI, Heart

To: James Harper <james.harper@xxxxxxxxxxxxxxxx>
Subject: Re: [Xen-users] Debian Etch Xen Cluster (DRBD, GNBD, OCFS2, iSCSI, Heartbeat?)
From: Florian Engelmann <mailinglist@xxxxxxxx>
Date: Thu, 13 Sep 2007 15:28:05 +0200
Cc: Dominik Klein <dk@xxxxxxxxxxxxxxxx>, xen-users@xxxxxxxxxxxxxxxxxxx
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James Harper schrieb:
Node1 should run A and D while node2 should run B and C. If Node1
fails
A and D should switch to node2 and switch back after node1 is back
again. I red a lot about very complex setups with OCFS2, iSCSI or
GNBD
but i think all i need ist DRBD and Heartbeat, isn't it?
Correct.


Just remember, if something goes wrong in such a way that the domain is
active on both nodes at the same time with read/write access to the
filesystem, you *will* *destroy* the filesystem and will need to restore
from backup. No amount of fscking will help you.

(I speak from bitter experience :)

James

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Sounds like you got some experience with such a setup. Do you think a cluster like this is ready for the productive use? Is Xen HVM fast enough to host a MSSQL Server (20 Users)?

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