On 05/05/15 06:30, Timofey Titovets wrote: > Hi list, > Excuse me, what I'm saying is off topic > > @Lionel, if you use btrfs, did you already try to use btrfs compression for OSD? > If yes, сan you share the your experience? Btrfs compresses by default using zlib. We force lzo compression instead by using compress=lzo in fstab. Behaviour obviously depends on the kind of data stored but in our case when we had more Btrfs OSD to compare with XFS ones we got between 10 and 15% less disk space on average (on this Ceph instance most files are in an already compressed format in the RBD volumes). Although it looks like it again with only one OSD out of 24 I can't confirm this right now. Best regards, Lionel. _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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