>Ken, the OSTs need to track the ownership of objects for quota. The more >stripes there are on a file, the more RPCs that need to be sent, which is why >we don't recommend wide striping unless there is a reason for it (bandwidth, >size, etc).
Fair enough; I always forget about quota accounting, because we never use it. But I'm wondering why this in particular causes such a hit, because the MDS sends the setattr RPCs asynchronously; in theory it should just fire them off and not have to wait until they're done. Perhaps it's the overhead of sending those RPCs which is slowing things down? I could believe that, although I would have thought that it wouldn't be that bad. --Ken _______________________________________________ Lustre-discuss mailing list [email protected] http://lists.lustre.org/mailman/listinfo/lustre-discuss
