[LU-4870] LFSCK3: Race between layout LFSCK and metadata migration

• Type: Bug
• Resolution: Fixed
• Priority: Critical
• Fix Version/s: Lustre 2.7.0
• Affects Version/s: Lustre 2.6.0
• Labels: MB
• Severity: 3
• Assignee: nasf (Inactive)
• Reporter: nasf (Inactive)

Description

According to current metadata migration implementation, before the old MDT-object is removed, both the new MDT-object and old MDT-object will reference the same LOV layout. Then if the layout LFSCK finds the new MDT-object by race, it will regard related OST-object(s) as multiple referenced case, and will try to create new OST-object(s) for the new MDT-object.

Comments

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch http://review.whamcloud.com/13182/
Subject: LU-4870 lfsck: lock old MDT-object in migrating
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 19ae9b3605bd41348b2bd64accc50a34eaaa35a1

[Gerrit Updater]

Fan Yong ([e-mail]) uploaded a new patch: http://review.whamcloud.com/13182
Subject: LU-4870 lfsck: lock old MDT-object in migrating
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 42f33938070b9e282d4408114c6aa6c49af35394