[LU-5523] support stripe_index in default LMV stripeEA

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.8.0
• Labels: easy
• Severity: 3
• Assignee: Di Wang
• Reporter: Di Wang

Description

Currently only default stripe count is supported in striped directory, which is landed on 2.6. We should also support default stripe index, so the subdirectories will be created at the MDT indicated by default stripe index, similar as default stripe index for files. And if the default stripe_index is -1, it will choose MDT evenly among all of MDTs.

Issue Links

• is duplicated by: LU-4657 add [--delete|-d] option for lfs setdirstripe to delete the default striping from the directory.