[Gluster-users] Is Fencing necessary

Emmanuel Noobadmin centos.admin at gmail.com
Sat Jul 10 05:15:38 UTC 2010

The documentation says that in a split brain situation (assuming two
storage nodes), it will lock files that had been updated but are
different until manual deletion of all unwanted copies.

Given this behaviour, is fencing necessary if some downtime waiting
for manual intervention is acceptable? E.g. monitoring software only
alerts admin but does not attempt to restart the failed data node.

Or is it absolutely necessary because some kinds of split brain
situation can occur and recover without requiring manual intervention?
E.g. temporary network failure, sudden load spike one storage server
leading to false "dead" detection.

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