[LU-11710] File is lost after migrate a sub dir under dir with default stripe Created: 28/Nov/18 Updated: 21/Jan/22 Resolved: 21/Jan/22 |
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| Status: | Resolved |
| Project: | Lustre |
| Component/s: | None |
| Affects Version/s: | Lustre 2.10.6 |
| Fix Version/s: | None |
| Type: | Bug | Priority: | Minor |
| Reporter: | Sarah Liu | Assignee: | WC Triage |
| Resolution: | Cannot Reproduce | Votes: | 0 |
| Labels: | None | ||
| Environment: |
lustre-b2_10 2.10.6-RC2 (build #149) ldiskfs DNE |
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| Severity: | 3 |
| Rank (Obsolete): | 9223372036854775807 |
| Description |
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The file is lost after migrate a sub dir under a dir with default stripe, here are the steps [root@trevis-60vm4 ~]# cd /mnt/lustre/ [root@trevis-60vm4 lustre]# mkdir test-0 [root@trevis-60vm4 lustre]# lctl dl 0 UP mgc MGC10.9.6.158@tcp 3637a725-753d-86b4-1ebf-fb1bdf78fb28 4 1 UP lov lustre-clilov-ffff978f79f97000 a48ec6c3-f700-afb4-00c3-9288ece40f26 3 2 UP lmv lustre-clilmv-ffff978f79f97000 a48ec6c3-f700-afb4-00c3-9288ece40f26 3 3 UP mdc lustre-MDT0000-mdc-ffff978f79f97000 a48ec6c3-f700-afb4-00c3-9288ece40f26 4 4 UP mdc lustre-MDT0001-mdc-ffff978f79f97000 a48ec6c3-f700-afb4-00c3-9288ece40f26 4 5 UP osc lustre-OST0000-osc-ffff978f79f97000 a48ec6c3-f700-afb4-00c3-9288ece40f26 4 [root@trevis-60vm4 lustre]# mkdir test-0/test-1 [root@trevis-60vm4 lustre]# lfs setdirstripe -D -c 2 test-0/ [root@trevis-60vm4 lustre]# touch test-0/test-1/foo [root@trevis-60vm4 lustre]# echo aaa > test-0/test-1/foo [root@trevis-60vm4 lustre]# cat test-0/test-1/foo aaa [root@trevis-60vm4 lustre]# lfs migrate -m 1 test-0/test-1 [root@trevis-60vm4 lustre]# ls test-0/test-1/ [root@trevis-60vm4 lustre]# I also tried on master branch, it doesn't have the problem |
| Comments |
| Comment by Andreas Dilger [ 30/Nov/18 ] |
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Sarah, does this problem still happen if the "lfs setdirstripe" is not run on test-0/? We don't support restriping directories in 2.10, that was added by Lai in 2.12 only. The "lfs migrate" command shouldn't be using the default striping from the parent directory, since the test-1/ directory already exists. If lfs migrate is somehow using the default layout from the parent, then this is a bug and we should not allow migrating to a striped directory. |
| Comment by Sarah Liu [ 05/Dec/18 ] |
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Without the "lfs setdirstripe", the problem should gone, I tested dir(without striped) migration long time ago and it worked fine. |
| Comment by Andreas Dilger [ 05/Dec/18 ] |
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What this means is that we need to prevent "lfs migrate" from running on a striped directory in 2.10. |
| Comment by Andreas Dilger [ 21/Jan/22 ] |
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It looks like this is no longer a problem with 2.12. |