[lustre-discuss] Report Strange Problem on 2.15.5 with changelog_mask

[Aurelien Degremont]

Hello Philippe,

I do not see why changing the changelog mask would cause I/O error, especially as this seems transient.
Did you happen to have any errors on your client hosts or MDS hosts as the time of your testing ? (see dmesg)


Aurélien
________________________________
De : lustre-discuss <lustre-discuss-bounces at lists.lustre.org> de la part de Philippe Weill <Philippe.Weill at latmos.ipsl.fr>
Envoyé : mercredi 20 novembre 2024 07:11
À : lustre-discuss at lists.lustre.org <lustre-discuss at lists.lustre.org>
Objet : [lustre-discuss] Report Strange Problem on 2.15.5 with changelog_mask

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Hello

after passing the following command on our lustre MDS

lctl set_param -P mdd.*-MDT0000.changelog_mask='MARK MTIME CTIME'

unmounting and remounting the mdt on mds

we had  error on touch chmod chgrp existing files

root at host:~# echo foobar > /scratch/root/foobar
root at host:~# cat /scratch/root/foobar
foobar
root at host:~# echo foobar2 >>  /scratch/root/foobar
root at host:~# cat /scratch/root/foobar
foobar
foobar2
root at host:~# touch /scratch/root/foobar
touch: setting times of '/scratch/root/foobar': Input/output error
root at host:~# chgrp group /scratch/root/foobar
chgrp: changing group of '/scratch/root/foobar': Input/output error
root at host:~# chmod 666 /scratch/root/foobar
chmod: changing permissions of '/scratch/root/foobar': Input/output error


doing the following command

lctl set_param -P mdd.*-MDT0000.changelog_mask='-MARK -MTIME -CTIME'


and only activating non permanently for our robinhood

lctl set_param  mdd.*-MDT0000.changelog_mask='MARK MTIME CTIME'


[root at mds ~]#  lctl get_param  mdd.scratch-MDT0000.changelog_mask
mdd.scratch-MDT0000.changelog_mask=MARK MTIME CTIME


everything started to work again

Bug or bad use from us ?
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