[LU-18244] add 'lfs mkdir -C -N' overstriping support

• Type: Improvement
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.17.0
• Labels: easy lad24dd utils
• Severity: 3
• Assignee: Keguang Xu
• Reporter: Andreas Dilger

Description

With patch https://review.whamcloud.com/35034 "LU-12273 lod: metadata overstriping" it is possible to create overstriped directories across MDTs using "lfs mkdir -C N", and with patch https://review.whamcloud.com/54192 "LU-16938 utils: setstripe overstripe multiple OST count" it is possible to specify an overstripe factor for each OST for "lfs setstripe -C -N".

However, it is not possible to specify "lfs mkdir -C -N" to specify an overstripe factor for each MDT. It would be good to fix this inconsistency.

Issue Links

• is related to: LU-12273 DNE3: Metadata overstriping
• is related to: LU-16938 "lfs setstripe -C -1" stripes too widely, should be limited to OST_COUNT