Hello Gonçalo, Thanks for your reminding. I was just setting up the cluster for test, so don't worry, I can just remove the pool. And I learnt that since the replication number and pool number are related to pg_num, I'll consider them carefully before deploying any data.
> On Mar 23, 2016, at 6:58 AM, Goncalo Borges <[email protected]> > wrote: > > Hi Zhang... > > If I can add some more info, the change of PGs is a heavy operation, and as > far as i know, you should NEVER decrease PGs. From the notes in pgcalc > (http://ceph.com/pgcalc/): > > "It's also important to know that the PG count can be increased, but NEVER > decreased without destroying / recreating the pool. However, increasing the > PG Count of a pool is one of the most impactful events in a Ceph Cluster, and > should be avoided for production clusters if possible." > > So, in your case, I would consider in adding more OSDs. > > Cheers > Goncalo
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