[Linux-cluster] Add extra node to a 2-node cluster

HAWKER, Dan dan.hawker at astrium.eads.net
Tue Dec 19 15:19:06 UTC 2006



> 
> No, you can't do any sort of a "rolling upgrade". Once you 
> change the config file on one node, the node that's left in 
> the cluster will refuse to let it join because the config 
> file versions differ.
> 
> It's an unfortunate consequence of the fact the two-node 
> clusters are a special case. Normally a cman cluster requires 
> (n/2)+1 nodes to keep quorum.
> 

Ah well. Thanks for clearing that up for me Patrick.

At least I know, before attempting something stupid :)

Dan

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