> On Oct 13, 2016, at 12:32 PM, E.S. Rosenberg <esr+lus...@mail.hebrew.edu>
> I thought ZFS was only recommended for OSTs and not for MDTs/MGS?
ZFS usually has lower metadata performance for MDT than using ldiskfs which is
why some people recommend ZFS only for the OSTs. However, ZFS has features
(like snapshots) that are useful for the MDT so some folks are willing to
accept a performance hit in order to take advantage of those features.
Senior HPC System Administrator
National Institute for Computational Sciences
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