On 5 February 2015 at 07:22, Sage Weil <s...@newdream.net> wrote: > > Is the snapshoting performed by ceph or by the fs? Can we switch to > > xfs and have the same capabilities: instant snapshot + instant boot > > from snapshot? > > The feature set and capabilities are identical. The difference is that on > btrfs we are letting btrfs do the efficient copy-on-write cloning when we > touch a snapshotted object while with XFS we literally copy the object > file (usually 4MB) on the first write.
Are ceph snapshots really that much faster when using btrfs underneath? one of the problem we have with ceph is that snapshot take/restore is insanely slow, tens of minutes - but we are using xfs. -- Lindsay
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