Hi,
we run a 3 node cluster, every node runs a mon and 4 osds. 2 defined
pools, one with replication level 2, the second with replication level 3.
We now want to relocate one node from one datacenter to another, which
means a downtime of about 4 hours for that specific node, which
shouldn't hurt the cluster, as 2 nodes are still working.
But is there anything special we should consider or do beforehand,
besides praying that nothing bad will happen with the remaining two nodes?
Thanks for your help,
best regards,
Kurt
Well, with four hours out then the moved OSD is going to get marked out, and the other two will re-replicate between themselves. You might want to do something like set the noout flag on the cluster to prevent that.
-Greg
--
Software Engineer #42 @ http://inktank.com | http://ceph.com
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