Am 05.01.2015 um 19:36 schrieb Stefan Priebe:
Hi devs, while btrfs is now declared as stable ;-) i wanted to retest btrfs on our production cluster on 2 out of 54 osds. So if they crash it doesn't hurt. While if those OSDs run XFS have spikes of 20MB/s every 4-7s. The same OSDs after formatting them with btrfs have spikes of 190MB/s every 4-7s. Why does just another filesystem raises the disk load by a factor of 10?
OK this seems to happen cause ceph is creating every 5s a new subvolume / snap. Is this really expected / needed?
Stefan
I'm running dumpling. Greets Stefan
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