[LU-17573] lets use ext4 limit for uninitiated object.

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.16.0, Lustre 2.15.6
• Severity: 3
• Assignee: Alexey Lyashkov
• Reporter: Alexey Lyashkov

Description

[root@devel1 tests]# ../utils/lfs setstripe -E 4M -L raid0 -c 1 -E -1 -L raid0 -c 2 /mnt/lustre/pfl-file
[root@devel1 tests]# truncate -s 30TB /mnt/lustre/pfl-file
truncate: не удалось усечь '/mnt/lustre/pfl-file' на 30000000000000 байт: Файл слишком велик
[root@devel1 tests]# truncate -s 2TB /mnt/lustre/pfl-file
[root@devel1 tests]# truncate -s 30TB /mnt/lustre/pfl-file

Issue Links

• is related to: LU-18347 dd: failed to truncate to 17592186044416 bytes in output file 'pfl-two/16TB': File too large

Comments

[Gerrit Updater]

"Oleg Drokin <[e-mail]>" merged in patch https://review.whamcloud.com/c/fs/lustre-release/+/56100/
Subject: LU-17573 lov: change default object size.
Project: fs/lustre-release
Branch: b2_15
Current Patch Set:
Commit: 439599802917ae998d322310a93860090f5cf6e8

[Andreas Dilger]

It would be useful if there was a sanity-pfl test case for this patch, like what is described in the original description.

[Eric Carbonneau]

We encountered a similar isssue after setting PFL and all OSTs ended up with a file too large error:

here is how we reproduced the error:
===================================================
[faaland1@mutt9 pfltest] $mkdir nopfl pfl-one pfl-two
[faaland1@mutt9 pfltest] $lfs setstripe -E 256G -c2 -S 16M -E -1 -c -1 pfl-two
[faaland1@mutt9 pfltest] $lfs setstripe -E -1 -c -1 pfl-one
[faaland1@mutt9 pfltest] $lfs setstripe -c -1 -S 16M nopfl
[faaland1@mutt9 pfltest] $pwd
/p/lflood/faaland1/test/pfltest
[faaland1@mutt9 pfltest] $lfs check servers .
lflood-OST0000-osc-ff1a28194597d000 active.
lflood-OST0001-osc-ff1a28194597d000 active.
lflood-OST0002-osc-ff1a28194597d000 active.
lflood-OST0003-osc-ff1a28194597d000 active.
lflood-MDT0000-mdc-ff1a28194597d000 active.
lflood-MDT0001-mdc-ff1a28194597d000 active.
lflood-MDT0002-mdc-ff1a28194597d000 active.
lflood-MDT0003-mdc-ff1a28194597d000 active.
MGC172.19.1.133@o2ib100 active.
[faaland1@mutt9 pfltest] $for xx in *; do echo $xx; dd if=/dev/zero bs=1 seek=$((8*2))T of=${xx}/16TB count=1; echo; done 2>&1
nopfl
1+0 records in
1+0 records out
1 byte copied, 0.0006174 s, 1.6 kB/s

pfl-one
1+0 records in
1+0 records out
1 byte copied, 0.000456144 s, 2.2 kB/s

pfl-two
dd: failed to truncate to 17592186044416 bytes in output file 'pfl-two/16TB': File too large
==============================================

If one of the watcher could xonfirm the current fix for this ticket really address the error we encountered.

thanks

[Gerrit Updater]

"Eric Carbonneau <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/56100
Subject: LU-17573 lov: change default object size.
Project: fs/lustre-release
Branch: b2_15
Current Patch Set: 1
Commit: dd932b9eb0fd06a5c97687f3020573955df5c590

[Peter Jones]

Merged for 2.16

[Gerrit Updater]

"Oleg Drokin <[e-mail]>" merged in patch https://review.whamcloud.com/c/fs/lustre-release/+/54137/
Subject: LU-17573 lov: change default object size.
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: f315a3a594a78ecd47fcd74177fa73fb2efff59c

[Gerrit Updater]

"Alexey Lyashkov <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/54137
Subject: LU-17573 lov: change default object size.
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: d3cc01bc96be83668c668cebeeca99c9470c9422