[LU-11546] enable large_dir support for MDTs

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.14.0, Lustre 2.12.8
• Affects Version/s: Lustre 2.12.0, Lustre 2.13.0
• Labels: LTS12
• Severity: 3
• Assignee: Dongyang Li
• Reporter: Andreas Dilger

Description

Now that e2fsprogs-1.44.3 has support for large_dir, testing and enabling the large_dir support on MDTs would allow single directories to exceed the ~10M limit currently imposed by the 2-level htree. This should be done automatically for new MDTs, and the existing error message in ext4_dx_add_entry() should be updated to directly reference the large_dir feature by name instead of just "Large directory", and explain that it should be enabled by tune2fs.

Issue Links

• is related to: LU-12892 Large directory feature is not enabled (REMOTE_PARENT_DIR)
• is related to: LU-14345 e2fsck of very large directories is broken
• is related to: LU-14734 enable large_dir on existing MDTs
• is related to: LU-12406 conf-sanity test 111 fails with ‘add mds1 failed with new params’
• is related to: LU-10329 DNE3: REMOTE_PARENT_DIR scalability
• is related to: LU-11915 conf-sanity test 115 is skipped or hangs
• is related to: LU-1365 Implement ldiskfs LARGEDIR support for e2fsprogs
• is related to: LU-11440 Make e2fsprogs-1.44.3-wc1 release
• is related to: LU-11912 reduce number of OST objects created per MDS Sequence
• is related to: LU-6824 improve error messages for dir htree limit