[LU-12353] optimizations for ldiskfs quota updates

• Type: Improvement
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.14.0, Lustre 2.16.0, Lustre 2.15.3
• Labels: IO500 patch performance
• Assignee: Andrew Perepechko
• Reporter: Andrew Perepechko

Description

We can slightly improve quota usage accounting times by avoiding unnecessary ondisk updates.

A patch and explanation will be added.

Issue Links

• is related to: LU-10034 LDISKFS Quota scalability improvement

Comments

[Gerrit Updater]

"Oleg Drokin <[e-mail]>" merged in patch https://review.whamcloud.com/c/fs/lustre-release/+/50853/
Subject: LU-12353 ldiskfs: add ext4-dquot-commit-speedup patch to more series
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: ec8f93afa0559ef6bfcdf701f4c1a50207901ef2

[Gerrit Updater]

"Oleg Drokin <[e-mail]>" merged in patch https://review.whamcloud.com/c/fs/lustre-release/+/50983/
Subject: LU-12353 ldiskfs: add ext4-dquot-commit-speedup patch to more series
Project: fs/lustre-release
Branch: b2_15
Current Patch Set:
Commit: 5305f6efdd3aae1b1034eb6a9d880f6db8559dbf

[Gerrit Updater]

"Jian Yu <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/50983
Subject: LU-12353 ldiskfs: add ext4-dquot-commit-speedup patch to more series
Project: fs/lustre-release
Branch: b2_15
Current Patch Set: 1
Commit: 2a33165775f7fefa9682432869e920ead225352c

[Gerrit Updater]

"Jian Yu <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/50853
Subject: LU-12353 ldiskfs: add ext4-dquot-commit-speedup patch to more series
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 8843159caf504c8fc22402ad5b06594da378bae7

[Peter Jones]

Landed for 2.14

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch https://review.whamcloud.com/34992/
Subject: LU-12353 ldiskfs: speedup quota journalling
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: dad25f258e50895b4bd5fce30765599a7a490aa0

[Andrew Perepechko]

sihara,

Do we expect performance improvement even no quota enforcement, but just quota accounting on quota slave?

Yes.

[Shuichi Ihara]

Andreas, Sure. I will add my Todo list and test this patch too. Just an confirmation. Do we expect performance improvement even no quota enforcement, but just quota accounting on quota slave? quota accounting is always enabled by default, right?

[Wang Shilong (Inactive)]

Acutally, this could help IO500 since we have quota accounting by default.

[Andreas Dilger]

Shuichi, would you be able to test out the referenced patch to see if it improves performance for us? This is not urgent, since I don't think e.g. we have quota enabled for IO500, but if we always have quota enabled on customer systems then it would be nice to add a 10-15% improvement (as mentioned in the comments in Gerrit on this patch) "for free" if this 2-line patch helps.