[LU-3537] allow cross-MDT for all metadata operations

• Type: Technical task
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.8.0
• Assignee: Di Wang
• Reporter: Di Wang

Description

In DNE phase I, only create/unlink remote directories are allowed between MDT. In DNE phase II, all of metadata operation are allowed to be cross-MDT. This task should remove those limitation added in phase I, and add necessary cross-MDT updates to allow all metadata operation to cross-MDT.

Issue Links

• is related to: LU-11549 Unattached inodes after 3 min racer run.
• is related to: LU-12665 moving files between MDTs by mv(1) doesn't work with Lustre-2.7 servers.
• is related to: LU-3532 rename under same striped directory
• is related to: LU-3541 add sanity tests for async updates between MDT