Hi, the default min_size for an EC pool is always k + 1, except when you choose m = 1, then it will be k (I won’t go into details if m = 1 is a good choice or not). You can temporarily reduce min_size to k, in a disaster recovery scenario it can help. But k + 1 is a safety switch, so if you reduce it, ensure to set it back after recovery. If you plan to take multiple hosts offline on a regular basis, I’d recommend to consider a different EC profile. Note that you can’t change the EC profile of a pool, you would need to create a new pool with the desired profile and copy the data over to the new pool. Regards Eugen Zitat von "GLE, Vivien via ceph-users" <ceph-users@ceph.io>:

Hi,

We have a 9 hosts (3 per pod) cluster with 1 pool in EC 5+3 (host domain failure), I expected that shutting down 1 pod wouldn't affect our pg but I just discovered that the EC pool is in min_size 6 while trying it.

Is min_size 6 important in this case ? Could I safely lower it to 5 or using another EC k+m would suit better ?

Thanks !

Vivien _______________________________________________ ceph-users mailing list -- ceph-users@ceph.io To unsubscribe send an email to ceph-users-leave@ceph.io