[LU-10921] Re-striping of DoM file returns success but no effect/change

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.12.0
• Severity: 3
• Assignee: Mikhail Pershin
• Reporter: Rahul Deshmukh (Inactive)

Description

• Create dom file with stripe size of 1M
• Re-stripe the same file with another valid value stripe size.
  This command returns success but value is not updated.

# lfs setstripe -E 1M -L mdt /mnt/lustre/dom
# lfs setstripe -E 64K -L mdt /mnt/lustre/dom
# lfs getstripe /mnt/lustre/dom
/mnt/lustre/dom
 lcm_layout_gen: 1
 lcm_mirror_count: 1
 lcm_entry_count: 1
 lcme_id: 1
 lcme_mirror_id: 0
 lcme_flags: init
 lcme_extent.e_start: 0
 lcme_extent.e_end: 1048576
 lmm_stripe_count: 0
 lmm_stripe_size: 1048576
 lmm_pattern: mdt
 lmm_layout_gen: 0
 lmm_stripe_offset: 0

Comments

[Peter Jones]

Landed for 2.12

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch https://review.whamcloud.com/32442/
Subject: LU-10921 utils: improve lfs setstripe error message
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 18fa5cc885539b7beb79fed5061b0fffbb8fa090

[Andreas Dilger]

This patch doesn't resolve the core problem, but at least improves the existing error messages to be more user friendly.

[Gerrit Updater]

Andreas Dilger ([e-mail]) uploaded a new patch: https://review.whamcloud.com/32442
Subject: LU-10921 utils: improve lfs setstripe error message
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: c541f6e0a42a8a2b1d7bf24cff03a998dba52241

[Andreas Dilger]

It would probably be OK, but it is also tricky since components can be added to existing files, while it is not possible to do this with plain layouts.

[Mikhail Pershin]

yes, I've noticed that too while trying to create FLR layouts. Andreas, do you think it will be enough to return the same error for composite layout case?

[Andreas Dilger]

This appears to be true for any composite layout (i.e. using -E), regardless of whether DoM is used or not. Using lfs setstripe with a plain layout (e.g. only -c2) prints an error "stripe already set".

[Peter Jones]

Mike

Could you please advise?

Thanks

Peter