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

[Philippe Weill]

On 20/11/2024 16:24, Aurelien Degremont wrote:
> 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)


hello

no we did not see and we have reproduced the problem with 3 vm Rocky 8.10 with fresh 2.15.5  ( 1 mds , 1 oss , 1 client )


> 
> 
> 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
> External email: Use caution opening links or attachments
> 
> 
> 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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