Hi Richard, Thanks for that. It never occurred to me that we'd need at least 10 servers for that shape of EC. We will certainly push to get that new server in now. -Dave On 2022-05-04 5:07 p.m., Richard Bade wrote: > [△EXTERNAL] > > > > Hi David, > I think that part of the problem with unbalanced osds is that your EC > rule k=7,m=2 gives 9 total chunks and you have 9 total servers. This > is essentially tying cephs hands as it has no choice where to put the > pg's. Assuming a failure domain of host then each EC shard needs to be > on a different host. > Therefore adding another host would help, but you're still going to be > limited. For balance a rule of k=4,m=2 would work better on 9 servers. > I had a similar experience with 6 hosts and 4,2 EC rule. > This may also cause you other problems if you have a host failure as > you wouldn't be able to balance out the host due to 8 hosts being less > than 9 shards. You would stay degraded. At least that is my > understanding. I'm happy to be corrected if I've put you wrong. > > Rich _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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