[LUDOC-455] Document mdt.*.readonly parameter

• Type: Improvement
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.13.0 Manual
• Affects Version/s: Lustre 2.13.0 Manual
• Assignee: Joseph Gmitter (Inactive)
• Reporter: Andreas Dilger

Description

Add documentation to the manual for the mdt.*.readonly parameter added in patch https://review.whamcloud.com/33892 "LU-11811 mdt: Add a proc entry to set MDT to readonly" to allow the MDT to be set read-only in case of misbehaving clients. From the patch description:

It is sometimes desirable to be able to mark the filesystem read-only directly on the server, rather than remounting the clients and setting the option there. This can be useful if there is a rogue client that is deleting files, or when decommissioning a system to prevent already-mounted clients from modifying it anymore.

Add the mdt.*.readonly parameter to allow setting the MDT read-only immediately if set to 1. All future MDT access will immediately return -EROFS until the parameter is set to 0 again.

Comments

[Joseph Gmitter (Inactive)]

Patch landed.

[Gerrit Updater]

Joseph Gmitter ([e-mail]) merged in patch https://review.whamcloud.com/36012/
Subject: LUDOC-455 mdt: Document the mdt readonly parameter
Project: doc/manual
Branch: master
Current Patch Set:
Commit: 383ee832ecec39b96ba04c1952d246fb6eec8fa2

[Gerrit Updater]

Joseph Gmitter ([e-mail]) uploaded a new patch: https://review.whamcloud.com/36012
Subject: LUDOC-455 mdt: Document the mdt readonly parameter
Project: doc/manual
Branch: master
Current Patch Set: 1
Commit: d7a5c5d5c4c066756b8a9a08cd50ec6ea9434f28

[Gerrit Updater]

Joseph Gmitter ([e-mail]) uploaded a new patch: https://review.whamcloud.com/35927
Subject: LUDOC-455 mdt: Document the mdt readonly parameter
Project: doc/manual
Branch: master
Current Patch Set: 1
Commit: 985541e9432a9f3f8eaa7c36e103cb54a43d06fc