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<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Or add:<br>
UPDATECTIME yes<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> SKIPACLUPDATECHECK yes<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">To you dsm.opt file to skip checking for those updates and don’t back them up again.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Actually I thought TSM only updated the metadata if the mode/owner changed, not re-backed the file…<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Simon<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="font-size:12.0pt;color:black">From:
</span></b><span style="font-size:12.0pt;color:black">gpfsug-discuss-bounces@spectrumscale.org <gpfsug-discuss-bounces@spectrumscale.org> on behalf of Jonathan Buzzard <jonathan.buzzard@strath.ac.uk><br>
<b>Date: </b>Tuesday, 7 December 2021 at 14:29<br>
<b>To: </b>gpfsug-discuss@spectrumscale.org <gpfsug-discuss@spectrumscale.org><br>
<b>Subject: </b>Re: [gpfsug-discuss] Question on changing mode on many files<o:p></o:p></span></p>
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<p class="MsoNormal">On 07/12/2021 14:01, Frederick Stock wrote:<br>
<br>
> If you are running on a more recent version of Scale you might want to <br>
> look at the mmfind command. It provides a find-like wrapper around the <br>
> execution of policy rules.<br>
> <br>
<br>
I am not sure that will be any faster than a "chmod -R" as it will exec <br>
millions of instances of chmod. What you gain on the swings you are <br>
going to loose on the roundabouts.<br>
<br>
TL;DR is you want to change permissions on millions of files expect it <br>
to take a considerable period of time. Even a modern NVMe SSD probably <br>
does around 50k IOPS per second, so best case scenario is one million <br>
files taking 40 seconds, at one read and one write per file and that is <br>
frankly unlikely.<br>
<br>
Also get ready to back them up again.<br>
<br>
<br>
JAB.<br>
<br>
-- <br>
Jonathan A. Buzzard Tel: +44141-5483420<br>
HPC System Administrator, ARCHIE-WeSt.<br>
University of Strathclyde, John Anderson Building, Glasgow. G4 0NG<br>
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