[gpfsug-discuss] Question on changing mode on many files

[Simon Thompson]

> 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
> file, so safest to bump the permissions with a subtractive or additive o-w or g+w type operation.

This depends entirely on the fileset setting, see:
https://www.ibm.com/docs/en/spectrum-scale/5.1.2?topic=reference-mmchfileset-command

“allow-permission-change”

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 …

Simon
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