Hi Daniel, Thanks for clarifying. I'll have a look at dirfrag option.
Regards, Webert Lima Em sáb, 19 de mai de 2018 01:18, Daniel Baumann <daniel.baum...@bfh.ch> escreveu: > 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 >
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