[gpfsug-discuss] quota on secondary groups for a user?

[Jonathan Buzzard]

On 03/08/16 17:22, Jaime Pinto wrote:
> Suppose I want to set both USR and GRP quotas for a user, however GRP is
> not the primary group. Will gpfs enforce the secondary group quota for
> that user?

Nope that's not how POSIX schematics work for group quotas. As far as I 
can tell only your primary group is used for group quotas. It basically 
makes group quotas in Unix a waste of time in my opinion. At least I 
have never come across a real world scenario where they work in a useful 
manner.

> What I mean is, if the user keeps writing files with secondary group as
> the attribute, and that overall group quota is reached, will that user
> be stopped by gpfs?
>

File sets are the answer to your problems, but retrospectively applying 
them to a file system is a pain. You create a file set for a directory 
and can then apply a quota to the file set. Even better you can apply 
per file set user and group quotas. So if file set A has a 1TB quota you 
could limit user X to 100GB in the file set, but outside the file set 
they could have a different quota or even no quota.

Only issue is a limit of ~10,000 file sets per file system


JAB.

-- 
Jonathan A. Buzzard                 Email: jonathan (at) buzzard.me.uk
Fife, United Kingdom.