[LU-15425] "lfs migrate" and "lfs_migrate" to accept list of FIDs

• Type: Improvement
• Resolution: Unresolved
• Priority: Minor
• Labels: easy usability utils
• Epic Link: OST rebalance v1
• Assignee: Feng Lei
• Reporter: Andreas Dilger

Description

The "lfs migrate" and "lfs_migrate" commands should accept a list of FIDs instead of filenames on the command-line with the "--fids" option. This will allow them to use the "llapi_open_by_fid[_at]()" interface internally to open the files instead of doing pathname resolution, and improve integration into pipelines that produce FIDs instead of filenames (e.g. Changelogs) without the need to produce an intermediate pathname.

Issue Links

• is related to: LU-18811 Open fname/fid at early stage in 'lfs migrate' command
• is related to: LU-18454 'lfs migrate' command can read filenames from file/stdin
• is related to: LU-14429 fid2path cache in liblustreapi

Comments

[Gerrit Updater]

"Feng Lei <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/58260
Subject: LU-15425 utils: lfs_migrate script can accept FID
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: af53854149040739c1ee2361567fa113e9a757a0

[Gerrit Updater]

"Feng Lei <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/58224
Subject: LU-15425 utils: lfs migrate command can accept FIDs
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: cefc19eb619835e6605678c5eb3bfd999ed2b8ca

[Andreas Dilger]

Better to use llapi_open_by_fid_at() so that it works even in a subdirectory mount where the .lustre/fid directory does not exist.

[Feng Lei]

adilger Is it OK to construct filenames <lustre_mount_point>/.lustre/fids/<FID> based on the given FIDs, then execute the command as before.

[Feng Lei]

I'm going to add --fid option so that all the filenames are explained as fids. The fids are listed on command line or by --files-from=LIST_FILE  as if they are still filenames.