On Fri, 7 Jun 2013, Oliver Schulz wrote: > Hello, > > the CEPH "Hard disk and file system recommendations" page states > that XFS is the recommend OSD file system for production systems. > > Does that still hold true for the last kernels versions > (e.g. Ubuntu 12.04 with lts-raring kernel 3.8.5)? Short answer: yes. > Would btrfs provide a significant performance increase (I guess > it would mostly affect writes and the journal)? We're using > dedicated SSD journal partitions. Btrfs is the longer-term plan, but we haven't done as much testing there yet, and in particular, there is a bug in 3.9 that is triggered by a power-cycle and the fixes aren't yet backported to 3.9 stable. Until we have done more validation, we still recommend XFS. The last time we did aging tests on btrfs performance was very good (better than xfs) initially but then trailed off as things fragmented. This was ~3.2 era. We haven't repeated that yet for newer kernels. I suspect it is better now, but I don't know how much better... sage _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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