[LU-16340] Pool quotas: cannot hit EDQUOT due to the problem with indexes version

• Status: Resolved
• Project: Lustre
• Fix Version/s: Lustre 2.16.0
• Type: Bug
• Priority: Minor
• Reporter: Sergey Cheremencev
• Assignee: Sergey Cheremencev
• Resolution: Fixed
• Epic/Theme: Quota
• Severity: 3

Description

Each PQ has it’s own index file and it's version could be different from “global pool”. When pool settings are changed, MDT sends new limits and limit’s file version to OST. OST discards new settings if the version is less than it’s own version.
I.e. if you make 100 limit changes for a user from FOO pool, OSTs file version becomes 100+initial_version. Since this moment OSTs from the FOO pool ignore new “global” limits.
And if the latest limits for a pool FOO were zeroes, these OSTs think the quota is disabled for a user.

Below is a message can be seen if you hit described problem:

qsd_upd_schedule()) lustre-OST0000: discarding glb update from glimpse ver:7 local ver:203 

Comments

[Gerrit Updater]

"Sergey Cheremencev <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/49238
Subject: LU-16340 tests: check PQ quota indexes versions
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 8eb7627f6cbe37994d55c578cb393f9068d755b3

[Gerrit Updater]

"Sergey Cheremencev <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/49239
Subject: LU-16340 quota: notify only global lqe
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: f1d587ffc0375bfc79df13a1c701dd1921787eb4

[Gerrit Updater]

"Oleg Drokin <[e-mail]>" merged in patch https://review.whamcloud.com/c/fs/lustre-release/+/49239/
Subject: LU-16340 quota: notify only global lqe
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 513b1cdbca58913249eb524a37374c418fdec44f

[Peter Jones]

Seems to have merged for 2.16