[LU-10465] increase default stripe size to 4MB

• Type: Bug
• Resolution: Fixed
• Priority: Critical
• Fix Version/s: Lustre 2.16.0
• Affects Version/s: Lustre 2.11.0
• Labels: LTS12
• Severity: 3
• Assignee: Mikhail Pershin
• Reporter: Jian Yu

Description

Patch https://review.whamcloud.com/25336 for LU-9090 has increased the default OST BRW size to 4MB. Patch for this ticket will increase the default stripe size from 1MB to 4MB so that widely-striped files can generate full RPCs without pinning so much memory on the client.

Issue Links

• is related to: LU-17747 interop: sanity test_130g: filefrag printed 175 < 700 extents
• is related to: LU-10786 sanity-flr test_45: Create /mnt/lustre/d45.sanity-flr/f45.sanity-flr failed
• is related to: LU-17076 ptlrpc_nrs_req_stop_nolock() use after free with ORR NRS policy
• is related to: LU-10808 DoM: component end should align with dom_stripesize
• is related to: LU-11918 Allow setting default file layout on root directory at mkfs time
• is related to: LU-10463 Poor write performance periodically on repeated test runs
• is related to: LU-9090 increase default RPC size to 4MB

Comments

[Gerrit Updater]

"Oleg Drokin <[e-mail]>" merged in patch https://review.whamcloud.com/c/fs/lustre-release/+/54851/
Subject: LU-10465 test: fix interop test for 4M default stripe size
Project: fs/lustre-release
Branch: b2_15
Current Patch Set:
Commit: eeb8dde6ea5d1745e77f40c01701ecc784c4a996

[Gerrit Updater]

"Andreas Dilger <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/55440
Subject: LU-10465 test: fix sanity-pfl interop for 4M stripe size
Project: fs/lustre-release
Branch: b2_15
Current Patch Set: 1
Commit: 923c7c18ab419330645946bb9efd000c9d38da22

[Gerrit Updater]

"Li Dongyang <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/54851
Subject: LU-10465 test: fix interop test for 4M default stripe size
Project: fs/lustre-release
Branch: b2_15
Current Patch Set: 1
Commit: 9f02020eeecaf75156b4798c7843cdf16ad1dfa9

[Peter Jones]

Landed for 2.16

[Gerrit Updater]

"Oleg Drokin <[e-mail]>" merged in patch https://review.whamcloud.com/c/fs/lustre-release/+/52989/
Subject: LU-10465 osd-ldiskfs: 8MiB IOs should bypass cache
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: f8e49e321ed81d77b204af40165f9ae2d07c5986

[Gerrit Updater]

"Andreas Dilger <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/52989
Subject: LU-10465 osd-ldiskfs: 8MiB IOs should bypass cache
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 22f24efa69e46eaad909403f3bb473b5d40cab32

[Gerrit Updater]

"Oleg Drokin <[e-mail]>" merged in patch https://review.whamcloud.com/c/fs/lustre-release/+/37318/
Subject: LU-10465 lov: increase default stripe size to 4MB
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: ea18d7da59d369f093e340e150544f51b2f229a1

[Gerrit Updater]

Mike Pershin ([e-mail]) uploaded a new patch: https://review.whamcloud.com/39957
Subject: LU-10465 lod: adjust component stripe size
Project: fs/lustre-release
Branch: b2_12
Current Patch Set: 1
Commit: bf76de5430fa104b2992f40768cdf8c97699f1de

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch https://review.whamcloud.com/37661/
Subject: LU-10465 lod: adjust component stripe size
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: e67a7f7b960a042ae7369e81e4365c6f7e095d25

[Gerrit Updater]

Mike Pershin ([e-mail]) uploaded a new patch: https://review.whamcloud.com/37661
Subject: LU-10465 lod: adjust component stripe size
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 6b589349595efb4eba73b40c7e7e8f07c41bd8b3

[Mikhail Pershin]

Probably I see where problem is, test does the following:

$LFS migrate -E 2M -c1 -E -1 -c2 $dom

without implicitly set stripe size, LOD uses default size 4MB and fails because it is over whole component 2MB. Considering the user may not know default MDT stripe size, I'd say it is not his fault to use 2MB component, and either lfs or LOD should take care and reduce stripe size to the component size maybe?