On Wed, Aug 30, 2017 at 7:21 AM, Martin Millnert <martin@xxxxxxxxxxx> wrote: > Hi, > > what is the proper method to not only setup but also successfully use > CephFS on erasure coded data pool? > The docs[1] very vaguely state that erasure coded pools do not support omap > operations hence, "For Cephfs, using an erasure coded pool means setting > that pool in a file layout.". The file layout docs says nothing further > about this [2]. (I filed a bug[3].) > > I'm guessing this translates to something along the lines of: > > ceph fs new cephfs cephfs_metadata cephfs_replicated_data > ceph fs add_data_pool cephfs cephfs_ec_data > > And then, > > setfattr -n ceph.dir.layout.SOMETHING -v cephfs_ec_data $cephfs_dir Yep. The SOMETHING is just "pool". I see from your ticket that you're getting an OSD crash, which is pretty bad news! For what it's worth, I have a home cephfs-on-EC configuration that has run happily for quite a while, so this can be done -- we just need to work out what's making the OSDs crash in this particular case. Cheers, John > > To achieve the inheritance of all files under $cephfs_dir to use the > erasure coded pool afterwards. > > Am I on the right track here? > > /M > > 1. http://docs.ceph.com/docs/master/rados/operations/erasure-code/ > 2. http://docs.ceph.com/docs/master/cephfs/file-layouts/ > 3. http://tracker.ceph.com/issues/21174 > > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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