[Linux-HA] Two-node clusters in split-sites
astrachan at inter-systems.com.au
Thu Jan 22 16:11:05 MST 2009
> -----Original Message-----
> From: linux-ha-bounces at lists.linux-ha.org [mailto:linux-ha-
> bounces at lists.linux-ha.org] On Behalf Of Hell, Robert
> Sent: Thursday, 22 January 2009 9:33 PM
> To: linux-ha at lists.linux-ha.org
> Subject: [Linux-HA] Two-node clusters in split-sites
> we are planning to run multiple two-node clusters (with different
> functions: database cluster, samba cluster, ...) in two different sites
> with a fast, but unreliable network connections. All cluster nodes
> replicate data with drbd.
> I'm specially afraid of split-brain in this scenario because reliable
> fencing is not possible in this split-site situation.
Definitely get dopd working with DRBD/HA. On loss of DRBD connectivity the
secondary node will be marked as 'outdated', this will stop HA from
promoting it to primary which could happen in a split brain scenario.
> After investigating multiple cluster solutions I think Linux-HA is the
> only project which provides a solution for our problem. We want to use
> Linux-HA with one cluster node in each site and an external quorum
> server (as described in the Heartbeat tutorial) without fencing.
> Has anyone experiences with a solution like this and is this a solutions
> which should work, is "supported" and is worth further investigations?
> And last but not least: is it possible to run one quorum server for
> multiple clusters (as mentioned before we have multiple two-node
> clusters, but I only want to run one quorum server).
> Many thanks and kind regards,
> Linux-HA mailing list
> Linux-HA at lists.linux-ha.org
> See also: http://linux-ha.org/ReportingProblems
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