[LU-14762] qos subdirectory creation stay on parent MDT if less full than average doesn't work as expected Created: 14/Jun/21  Updated: 29/May/22  Resolved: 08/Jul/21

Status: Resolved
Project: Lustre
Component/s: None
Affects Version/s: None
Fix Version/s: Lustre 2.15.0

Type: Bug Priority: Minor
Reporter: Lai Siyao Assignee: Lai Siyao
Resolution: Fixed Votes: 0
Labels: None

Issue Links:
Duplicate
is duplicated by LU-14659 sanity test_413a: subdirs shouldn't b... Resolved
Related
is related to LU-13439 DNE3: MDT QOS tuning to avoid full MD... Resolved
is related to LU-13440 DNE3: limit directory default layout ... Resolved
is related to LU-15850 MDT QOS should always be used for rou... Resolved
Severity: 3
Rank (Obsolete): 9223372036854775807

 Description   

In "space balanced" subdirectory creation, subdirectories are kept on the parent MDT if it is less full than average, but it use "weight" other than space, however

weight = free space - penalty

if MDTs have different penalties, it will make this inaccurate.

 Comments   
Comment by Gerrit Updater [ 14/Jun/21 ]

Lai Siyao (lai.siyao@whamcloud.com) uploaded a new patch: https://review.whamcloud.com/43997
Subject: LU-14762 lmv: compare space to mkdir on parent MDT
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 40a045257b26fbf460216bc875bf2801a8528d70

Comment by Gerrit Updater [ 08/Jul/21 ]

Oleg Drokin (green@whamcloud.com) merged in patch https://review.whamcloud.com/43997/
Subject: LU-14762 lmv: compare space to mkdir on parent MDT
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 002c2a80266b23c1df02d554fbdc7e5817c42d13

Comment by Peter Jones [ 08/Jul/21 ]

Landed for 2.15

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