You are correct, but that will involve massive data movement. You can change the failure domain osd/host/rack/datacenter/etc... You can change the replica_count=2,3,4,5,6 You *CAN'T* change the EC value eg. 4+2 to something else Kind regards, Nino On Fri, Jun 23, 2023 at 12:40 AM Angelo Höngens <angelo@xxxxxxxxxx> wrote: > Hey, > > Just to confirm my understanding: If I set up a 3-osd cluster really > fast with an EC42 pool, and I set the crush map to osd failover > domain, the data will be distributed among the osd's, and of course > there won't be protection against host failure. And yes, I know that's > a bad idea, but I need the extra storage really fast, and it's a > backup of other data. So availability is important, but now critical. > > If I then add 5 more hosts a week later, I can just edit the crush map > and change the failover domain from osd to host, put the crush map > back in, and ceph should automatically distribute all the pg's over > the osd's again to be fully host-fault tolerant, right? > > Am I understanding this correctly? > > Angelo. > _______________________________________________ > ceph-users mailing list -- ceph-users@xxxxxxx > To unsubscribe send an email to ceph-users-leave@xxxxxxx > _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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