[DRBD-user] Recovering from split brain

James Pifer jep at obrien-pifer.com
Wed Aug 25 14:40:57 CEST 2010


We're looking at using xen on SLES11SP1 servers in production at remote
sites. We've been testing ocfs2 over dual primary drbd as one of the
storage choices. It runs great, and is certainly more cost affective
than putting SANs at our sites. 

Our big concern is split brain and how to handle that when it happens.
If you have a large, shared storage over drbd with VMs running on either
host, how do you handle a split brain situation from a recovery
standpoint? 

One idea we had is to run multiple ocfs2/drbd's, one for each VM, and we
can pick and choose which way to recover in a split brain. That seems
like it makes it a lot more complex and not sure how successful it would
even be. 

What has been your experience?

Any suggestions are appreciated.

Thanks,
James





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