On Tue, Nov 15, 2016 at 8:40 AM, Hauke Homburg <hhomburg@xxxxxxxxxxxxxx> wrote: > In the last weeks we enabled for testing the dir fragmentation. The Resultat > is that we have sometimes error messages with rsync with unlink and no-space > left on device. Enabling directory fragmentation would not cause the unlink and ENOSPC errors. Failure to unlink is caused by the stray directories on the MDS growing too large. The only current solution is to wait for the MDS to eventually purge the stray directory entries. Retry the unlink as necessary. [The other workaround is to increase mds_bal_fragment_size_max [1] which is not recommended.] Directory fragmentation is not yet considered stable so beware potential issues including data loss. However, fragmentation will allow your directories to grow to unbounded size. This includes the stray directories which would permit unlink to avoid this issue. > Does anyone have a timeline for the testing dir frag mds? Directory fragmentation is on track to be stable for the Luminous release. [1] https://github.com/ceph/ceph/pull/9789 -- Patrick Donnelly _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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