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

[Buterbaugh, Kevin L]

Hi Jaime / Sven,

If Jaime’s interpretation is correct about user1 continuing to be able to write to “group2” files even though that group is at their hard limit, then that’s a bug that needs fixing.  I haven’t tested that myself, and we’re in a downtime right now so I’m a tad bit busy, but if I need to I’ll test it on our test cluster later this week.

Kevin

On Aug 3, 2016, at 1:30 PM, Jaime Pinto <pinto at scinet.utoronto.ca<mailto:pinto at scinet.utoronto.ca>> wrote:

Quoting "Buterbaugh, Kevin L" <Kevin.Buterbaugh at Vanderbilt.Edu<mailto:Kevin.Buterbaugh at vanderbilt.edu>>:

Hi Sven,

Wait - am I misunderstanding something here?  Let?s say that I have  ?user1? who has primary group ?group1? and secondary group ?group2?.   And let?s say that they write to a directory where the bit on the  directory forces all files created in that directory to have group2  associated with them.  Are you saying that those files still count  against group1?s group quota???

Thanks for clarifying?

Kevin

Not really,

My interpretation is that all files written with group2 will count towards the quota on that group. However any users with group2 as the primary group will be prevented from writing any further when the group2 quota is reached. However the culprit user1 with primary group as group1 won't be detected by gpfs, and can just keep going on writing group2 files.

As far as the individual user quota, it doesn't matter: group1 or group2 it will be counted towards the usage of that user.

It would be interesting if the behavior was more as expected. I just checked with my Lustre counter-parts and they tell me whichever secondary group is hit first, however many there may be, the user will be stopped. The problem then becomes identifying which of the secondary groups hit the limit for that user.

Jaime



On Aug 3, 2016, at 11:35 AM, Sven Oehme  <oehmes at gmail.com<mailto:oehmes at gmail.com><mailto:oehmes at gmail.com>> wrote:

Hi,

quotas are only counted against primary group

sven


On Wed, Aug 3, 2016 at 9:22 AM, Jaime Pinto  <pinto at scinet.utoronto.ca<mailto:pinto at scinet.utoronto.ca><mailto:pinto at scinet.utoronto.ca>> 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?

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?

Thanks
Jaime




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