You would need to create a new pool and migrate the data to that new pool.
Replicated pool fronting an EC pool for RBD is a known-bad workload: http://docs.ceph.com/docs/master/rados/operations/cache-tiering/#a-word-of-caution
but others mileage may vary I suppose.
In order to migrate you could do an RBD at a time, I would probably take a snapshot and than do an `rbd cp` operation from the poolA/snap to poolB/image
If you are okay with the VMs being powered down you could do an `rbd mv` which doesnt support renames across pools, though I would prefer the cp method.
You could also do a wholesale pool copy using `rados cppool` see http://ceph.com/geen-categorie/ceph-pool-migration/
best of luck.
On Sat, Jan 13, 2018 at 6:37 PM, moftah moftah <mofta7y@xxxxxxxxx> wrote:
Hi All,is there a way to switch a pool that is set to be EC to being replicated without the need to switch to new pool and migrate data ?I am getting poor results from EC and want to switch to replicated but i already have customers on the system .i using ceph 11the EC already have cache tier that is replicatedThanks
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Respectfully,
Wes Dillingham
Research Computing | Senior CyberInfrastructure Storage Engineer
Harvard University | 38 Oxford Street, Cambridge, Ma 02138 | Room 204
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