[DRBD-user] un-fencing

Felix Frank ff at mpexnet.de
Thu Nov 18 20:45:21 CET 2010


On 18.11.2010 18:52, Or Gerlitz wrote:
> Dario Fiumicello - Antek wrote:
>> You can promote an outdated secondary to primary with:
>> drbdadm -- --overwrite-data-of-peer primary <resource*>*
>> but this way, once the old primary is restored you'll get a split brain.
> Why is that, once the old primary is restored, and assuming the cluster
> managment doesn't assign it the primary role, I was thinking that it
> will get into SyncTarget state

Before it crashed, the old primary will have received changes that the 
other node doesn't know about. Hence split brain.

Regards,
Felix


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