> > We have a ceph cluster (Proxmox based) with is HDD-based. We’ve had > some performance and “slow MDS” issues while doing VM/CT backups from > the Proxmox cluster, especially when rebalancing is going on at the same > time. I also had to increase the mds cache quite a lot to get rid of 'slow' issues, ds_cache_memory_limit = But after some Luminous(?) update I started using less the cephfs, because of issues with the kernel mount. > My thought is that one of following is going to improve performance / > response: > 1. Add an M.2 drive for DB store on each node > 2. Migrate the cephfs metadata pool to SSDs > > We have ~25 nodes with ~3 OSDs per node. > > (1) is a lot of work and will cost more. > (2) seems more risky (to me) since the metadata pool would have to be > migrated (potential loss in transit?) Can't remember running into issues having done this switch quite a while ago. Still have only 7GB on ssd meta data pool vs 45TB / 13kk objects. _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
 |