On 12 Jul 2013, at 13:21, Tom Verdaat wrote: > In the mean time I've done some more research and figured out that: > • There is a bunch of other cluster file systems but GFS2 and OCFS2 are the only open source ones I could find, and I believe the only ones that are integrated in the Linux kernel. > • OCFS2 seems to have a lot more public information than GFS2. It has more documentation and a living - though not very active - mailing list. > • OCFS2 seems to be in active use by its sponsor Oracle, while I can't find much on GFS2 from its sponsor RedHat. > • OCFS2 documentation indicates a node soft limit of 256 versus 16 for GFS2, and there are actual deployments of stable 45 TB+ production clusters. > • Performance tests from 2010 indicate OCFS2 clearly beating GFS2, though of course newer versions have been released since. > • GFS2 has more fencing options than OCFS2. FWIW: For VM images (i.e. large files accessed by only one client at once) OCFS2 seems to perform better than GFS2. I seem to remember some performance issues with small files, and large directories with a lot of contention (multiple readers and writers of files or file metadata). You may need to forward port some of the more modern tools to your distro. -- Alex Bligh _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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