On 05/19/2018 01:13 AM, Webert de Souza Lima wrote: > New question: will it make any difference in the balancing if instead of > having the MAIL directory in the root of cephfs and the domains's > subtrees inside it, I discard the parent dir and put all the subtress right > in cephfs root?
the balancing between the MDS is influenced by which directories are accessed, the currently accessed directory-trees are diveded between the MDS's (also check the dirfrag option in the docs). assuming you have the same access pattern, the "fragmentation" between the MDS's happens at these "target-directories", so it doesn't matter if these directories are further up or down in the same filesystem tree. in the multi-MDS scenario where the MDS serving rank 0 fails, the effects in the moment of the failure for any cephfs client accessing a directory/file are the same (as described in an earlier mail), regardless on which level the directory/file is within the filesystem. Regards, Daniel _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
