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Hello Philippe,</div>
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I do not see why changing the changelog mask would cause I/O error, especially as this seems transient.</div>
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Did you happen to have any errors on your client hosts or MDS hosts as the time of your testing ? (see dmesg)</div>
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Aurélien</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>De :</b> lustre-discuss <lustre-discuss-bounces@lists.lustre.org> de la part de Philippe Weill <Philippe.Weill@latmos.ipsl.fr><br>
<b>Envoyé :</b> mercredi 20 novembre 2024 07:11<br>
<b>À :</b> lustre-discuss@lists.lustre.org <lustre-discuss@lists.lustre.org><br>
<b>Objet :</b> [lustre-discuss] Report Strange Problem on 2.15.5 with changelog_mask</font>
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<div class="PlainText">External email: Use caution opening links or attachments<br>
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Hello<br>
<br>
after passing the following command on our lustre MDS<br>
<br>
lctl set_param -P mdd.*-MDT0000.changelog_mask='MARK MTIME CTIME'<br>
<br>
unmounting and remounting the mdt on mds<br>
<br>
we had error on touch chmod chgrp existing files<br>
<br>
root@host:~# echo foobar > /scratch/root/foobar<br>
root@host:~# cat /scratch/root/foobar<br>
foobar<br>
root@host:~# echo foobar2 >> /scratch/root/foobar<br>
root@host:~# cat /scratch/root/foobar<br>
foobar<br>
foobar2<br>
root@host:~# touch /scratch/root/foobar<br>
touch: setting times of '/scratch/root/foobar': Input/output error<br>
root@host:~# chgrp group /scratch/root/foobar<br>
chgrp: changing group of '/scratch/root/foobar': Input/output error<br>
root@host:~# chmod 666 /scratch/root/foobar<br>
chmod: changing permissions of '/scratch/root/foobar': Input/output error<br>
<br>
<br>
doing the following command<br>
<br>
lctl set_param -P mdd.*-MDT0000.changelog_mask='-MARK -MTIME -CTIME'<br>
<br>
<br>
and only activating non permanently for our robinhood<br>
<br>
lctl set_param mdd.*-MDT0000.changelog_mask='MARK MTIME CTIME'<br>
<br>
<br>
[root@mds ~]# lctl get_param mdd.scratch-MDT0000.changelog_mask<br>
mdd.scratch-MDT0000.changelog_mask=MARK MTIME CTIME<br>
<br>
<br>
everything started to work again<br>
<br>
Bug or bad use from us ?<br>
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