[LU-7906] osd-zfs should not set blocksize on MDT Created: 22/Mar/16  Updated: 01/Oct/16  Resolved: 01/Jun/16

Status: Resolved
Project: Lustre
Component/s: None
Affects Version/s: None
Fix Version/s: Lustre 2.9.0

Type: Improvement Priority: Critical
Reporter: Alex Zhuravlev Assignee: Nathaniel Clark
Resolution: Fixed Votes: 0
Labels: None

Issue Links:
Blocker
is blocking LU-7895 zfs metadata performance improvements Resolved
Related
Rank (Obsolete): 9223372036854775807

 Description   

osd-zfs should not set blocksize on MDT. currently it does as the check is broken.

 Comments   
Comment by Joseph Gmitter (Inactive) [ 22/Mar/16 ]

Assigning to Alex as part of the ZFS metadata performance work

Comment by Andreas Dilger [ 22/Mar/16 ]

This seems like it could be a major cause of performance loss on the MDT? It would be worthwhile to get a patch and test this sooner rather than later.

Comment by Alex Zhuravlev [ 23/Mar/16 ]

in my testing it doesn't improve performance a lot, but except for large dnodes and dnode accounting I haven't found any silver bulltet. it's rather a lot of small improvements closing the gap with ldiskfs.

Comment by Gerrit Updater [ 01/Apr/16 ]

Alex Zhuravlev (alexey.zhuravlev@intel.com) uploaded a new patch: http://review.whamcloud.com/19286
Subject: LU-7906 osd: no blocksize on non-OST objects
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 12370e8871c19618b20b3af3293b72a19617a9c4

Comment by Gerrit Updater [ 31/May/16 ]

Oleg Drokin (oleg.drokin@intel.com) merged in patch http://review.whamcloud.com/19286/
Subject: LU-7906 osd: no blocksize on non-OST objects
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: aa84fbc8165f526dae4bd824a48c186c3ac2f639

Comment by Joseph Gmitter (Inactive) [ 01/Jun/16 ]

Landed to master for 2.9.0

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