[Linux-cluster] CS4 have a splitt-brain-problem in 2-node setup

Lon Hohberger lhh at redhat.com
Tue May 23 16:21:53 UTC 2006

On Mon, 2006-05-22 at 11:57 +0200, Falk Hackenberger - MediaTransfer AG
Netresearch & Consulting wrote:
> Hello,
> I try to use the CS4 for managing a 2-node-cluster.
> also i have a working fenicing-device (apc-powerswitch).
> I think I have found a design-error in the CS4.
> If you boot up one node(1) and this node(1) cant reach the other node(2)
> node(1) trys to fence node(2).
> This is fine...
> but if the fencing fails, node(1)
> starts his services via rgmanager without to be shure that the other
> node is not working.
> volia and you have a splitt-brain problem.

> any solution for this?

rgmanager should not start services unless the node is quorate.  The
cluster should not ever become quorate if fencing fails.  Sounds like a

-- Lon

More information about the Linux-cluster mailing list