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

Jaime Pinto pinto at scinet.utoronto.ca
Wed Aug 3 17:55:43 BST 2016


I guess I have a bit of a puzzle to solve, combining quotas on  
filesets, paths and USR/GRP attributes

So much for the "standard" built-in linux account creation script, in  
which by default every new user is created with primary GID=UID,  
doesn't really help any of us.

Jaime


Quoting "Jonathan Buzzard" <jonathan at buzzard.me.uk>:

> 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.
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