[LU-15307] Option to set max directory stripe count per filesystem

• Type: New Feature
• Resolution: Fixed
• Priority: Critical
• Fix Version/s: Lustre 2.15.0
• Affects Version/s: Lustre 2.7.0
• Labels: easy
• Assignee: Feng Lei
• Reporter: Andreas Dilger

Description

We have users that will set directory stripe count by using "-1" as in
"lfs setdirstripe -c -1".

Filesystem with small number of MDTs (4-8) this was ok. But as the MDT count gets lager (>32) this is not always desirable. Most of the time we don't want users to set directory stripe counts so large. We would like config option for max default directory size setting for ("lfs setdirstripe -c -1"). But would still like the ability to allow setting stripe counts larger for those who explicitly request it, but not unintentionally.

Issue Links

• Clones: LU-9162 Option to set max stripe count per filesystem
• is related to: LU-15314 set default max-inherit to 3 for default dir stripe policy if stripe count is not 0 or 1
• is related to: LUDOC-501 Document (dir)stripe limits
• is related to: LU-10329 DNE3: REMOTE_PARENT_DIR scalability