<div dir="ltr"><div>I checked on my office network....</div><div><br></div>mmfind --help<div><br></div><div>mmfind -polFlags '-N node1,node2 -B 100 -m 24' /path/to/find -perm +o=w ! \( -type d -perm +o=t \) -xargs chmod o-w</div><div><br></div><div>I think that the -m 24 is the default (24 threads per node), but it's nice to include on the command line so you remember you can increment/decrement it as your needs require or your nodes can handle.</div><div><br></div><div>It's IMPORTANT to review in the mmfind --help output that some things are 'mmfind' args and go BEFORE the path... some are CRITERIA args and have no impact on the files... BUT SOME ARE ACTION args, and they will affect files.</div><div><br></div><div>So -exec -xargs are obvious actions, however, -gpfsCompress doesn't find compressed files, it will actually compress the objects... in our AIX environment our compressed reads feel like they're essentially broken, we only get about 5MB/s, however on Linux compress reads seem to work fairly well.</div><div><br></div><div>So make sure to read the man page carefully before using some non-obvious GPFS enhancements. Also the nice thing is mmfind -xargs takes care of all the strange file names, so you don't have to do anything complicated, but you also can't pipe the output as it will run the xarg in the policy engine.</div><div><br></div><div>As a footnote this is my all time favorite find for troubleshooting...</div><div>find $(pwd) -mtime -1 | sed -e 's/.*/"&"/g' | xargs ls -latr</div><div><br></div><div>List all the files modified in the last day in reverse chronology...</div><div><br></div><div>Doesn't work :-(</div><div><br></div><div>Alec</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Dec 13, 2021 at 3:30 AM Dorigo Alvise (PSI) <<a href="mailto:alvise.dorigo@psi.ch">alvise.dorigo@psi.ch</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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<p class="MsoNormal"><span lang="EN-US">Hi Alec ,<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US">mmfind doesn’t have a man page (does it have an online one ? I cannot find it). And according to mmfind -h it doesn’t exposes the “-N” neither the “-B” flags. RPM is gpfs.base-5.1.1-2.x86_64.<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US">Do I have chance to download a newest version of that script from somewhere ?<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US">Thanks,<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"> Alvise<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
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<p class="MsoNormal"><b><span lang="EN-US">Da:</span></b><span lang="EN-US"> <a href="mailto:gpfsug-discuss-bounces@spectrumscale.org" target="_blank">gpfsug-discuss-bounces@spectrumscale.org</a> <<a href="mailto:gpfsug-discuss-bounces@spectrumscale.org" target="_blank">gpfsug-discuss-bounces@spectrumscale.org</a>>
<b>Per conto di </b>Dorigo Alvise (PSI)<br>
<b>Inviato:</b> lunedì 13 dicembre 2021 11:50<br>
<b>A:</b> gpfsug main discussion list <<a href="mailto:gpfsug-discuss@spectrumscale.org" target="_blank">gpfsug-discuss@spectrumscale.org</a>><br>
<b>Oggetto:</b> [gpfsug-discuss] R: Question on changing mode on many files<u></u><u></u></span></p>
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<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US">I am definitely going to try this solution with mmfind.<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US">Thank you also for the command line and several hints… I’ll be back with the outcome soon.<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"> Alvise<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
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<p class="MsoNormal"><b><span lang="EN-US">Da:</span></b><span lang="EN-US"> </span>
<a href="mailto:gpfsug-discuss-bounces@spectrumscale.org" target="_blank"><span lang="EN-US">gpfsug-discuss-bounces@spectrumscale.org</span></a><span lang="EN-US"> <</span><a href="mailto:gpfsug-discuss-bounces@spectrumscale.org" target="_blank"><span lang="EN-US">gpfsug-discuss-bounces@spectrumscale.org</span></a><span lang="EN-US">>
<b>Per conto di </b>Alec<br>
<b>Inviato:</b> domenica 12 dicembre 2021 23:04<br>
<b>A:</b> gpfsug main discussion list <</span><a href="mailto:gpfsug-discuss@spectrumscale.org" target="_blank"><span lang="EN-US">gpfsug-discuss@spectrumscale.org</span></a><span lang="EN-US">><br>
<b>Oggetto:</b> Re: [gpfsug-discuss] Question on changing mode on many files<u></u><u></u></span></p>
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<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
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<p class="MsoNormal"><span lang="EN-US">How am I just learning about this right now, thank you! Makes so much more sense now the odd behaviors I've seen over the years on GPFS vs POSIX chmod/ACL. Will definitely go review those settings on my filesets now,
wonder if the default has evolved from 3.x -> 4.x -> 5.x.<u></u><u></u></span></p>
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<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
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<p class="MsoNormal"><span lang="EN-US">IBM needs to find a way to pre-compile mmfind and make it supported, it really is essential and so beneficial, and so hard to get done in a production regulated environment. Though a bigger warning that the compress
option is an action not a criteria! <u></u><u></u></span></p>
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<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
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<p class="MsoNormal"><span lang="EN-US">Alec<u></u><u></u></span></p>
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<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
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<p class="MsoNormal"><span lang="EN-US">On Sun, Dec 12, 2021 at 9:01 AM Simon Thompson <</span><a href="mailto:s.j.thompson@bham.ac.uk" target="_blank"><span lang="EN-US">s.j.thompson@bham.ac.uk</span></a><span lang="EN-US">> wrote:<u></u><u></u></span></p>
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<p class="MsoNormal"><span lang="EN-GB">> I'm not sure if this happens on Spectrum Scale but on most FS's if you do a chmod 770 file you'll lose any ACLs assigned to the<br>
> file, so safest to bump the permissions with a subtractive or additive o-w or g+w type operation.<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB"> <u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB">This depends entirely on the fileset setting, see:<u></u><u></u></span></p>
<p class="MsoNormal"><a href="https://www.ibm.com/docs/en/spectrum-scale/5.1.2?topic=reference-mmchfileset-command" target="_blank"><span lang="EN-GB">https://www.ibm.com/docs/en/spectrum-scale/5.1.2?topic=reference-mmchfileset-command</span></a><span lang="EN-GB"><u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB"> <u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB">“</span><b><span lang="EN-GB" style="font-size:12pt;font-family:"IBM Plex Sans",sans-serif;color:rgb(22,22,22);letter-spacing:0.1pt;background:white">allow-permission-change</span></b><span lang="EN-GB">”<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB"> <u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB">We typically have file-sets set to chmodAndUpdateAcl, though not exclusively, I think it was some quirky software that tested the permissions after doing something
and didn’t like the updatewithAcl thing …<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB"> <u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB">Simon<u></u><u></u></span></p>
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