[LU-12036] Add option to create new OSTs inactive

• Status: Resolved
• Project: Lustre
• Fix Version/s: Lustre 2.14.0
• Type: New Feature
• Priority: Minor
• Reporter: Andrew Elwell
• Assignee: Andreas Dilger
• Resolution: Fixed
• Labels: LTS12, easy

Description

When adding new OSTs to an existing filesystem, it'd be nice to have a command line flag to be able to add them to the MGS in an inactive state so that they weren't used for allocation until the site was ready.

(this should be a non-default flag so it doesn't break existing behaviour)

Issue Links

• is related to: LU-12025 Adding OST may cause EIO - delay acti...
• is related to: LU-17300 Avoid creating new dir/file/object on...
• is related to: LU-17334 Client should handle dir/file/object ...

Comments

[Andreas Dilger]

With the landing of LU-12025 it should be relatively straight forward to add a mount option (maybe "nocreate" or "disabled" or "deactivated" or similar) that sets ofd->ofd_no_precreate immediately at mount time so that the MDS will not use it. This should have a test that verifies a newly-added OST is not used (even if requested specifically) when mounted with this option.

[Gerrit Updater]

Andreas Dilger ([e-mail]) uploaded a new patch: https://review.whamcloud.com/36716
Subject: LU-12036 ofd: add "nocreate" mount option
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 6de22b05b9881436fd4ec1d724758a69ba8673b0

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch https://review.whamcloud.com/36716/
Subject: LU-12036 ofd: add "no_precreate" mount option
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 416e67222b769df490a8be034ef987a596dd8dff

[Peter Jones]

Landed for 2.14

[Gerrit Updater]

Minh Diep ([e-mail]) uploaded a new patch: https://review.whamcloud.com/37133
Subject: LU-12036 ofd: add "no_precreate" mount option
Project: fs/lustre-release
Branch: b2_12
Current Patch Set: 1
Commit: ab889485b994814804059967a98f2da28590e956