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

[Alec]

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.

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!

Alec

On Sun, Dec 12, 2021 at 9:01 AM Simon Thompson <s.j.thompson at bham.ac.uk>
wrote:

> > 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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