[Linux-HA] N+N Cluster

[Michael Schwartzkopff]

Am Freitag, 2. Oktober 2009 13:05:42 schrieb Colin:
> Hallo,
>
> is there any experience on using Heartbeat with a N+N cluster, i.e. a
> cluster with more than 2 nodes split over two fire-areas?
>
> As far as I can gather from the documentation, this setup has the
> problem that if one fire-area is offline, then the other fire-area
> will either stop working immediately, or as soon as one of its
> computers has a problem (I read somewhere in the documentation that >
> 50% are needed in a group of nodes to carry on, however in a two-node
> setup that would not work...?) which somehow defeats the intention of
> a fire-area to improve availability...
>
> Thanks, Colin

It depends on your setup. heartbeat doesn't care about quorum if there are 
only two nodes in the cluster. If you have more nodes you can disable this 
feature and and/or use stonith.

Anyway: I would advise you not to use heartbeat any more, but to upgrade to 
pacemaker. 

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