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

[Buterbaugh, Kevin L]

Hi Jaime,

Thank you sooooo much for doing this and reporting back the results!  They’re in line with what I would expect to happen.  I was going to test this as well, but we have had to extend our downtime until noontime tomorrow, so I haven’t had a chance to do so yet.  Now I don’t have to… ;-)

Kevin

On Aug 4, 2016, at 10:59 AM, Jaime Pinto <pinto at scinet.utoronto.ca<mailto:pinto at scinet.utoronto.ca>> wrote:

Since there were inconsistencies in the responses, I decided to rig a couple of accounts/groups on our LDAP to test "My interpretation", and determined that I was wrong. When Kevin mentioned it would mean a bug I had to double-check:

If a user hits the hard quota or exceeds the grace period on the soft quota on any of the secondary groups that user will be stopped from further writing to those groups as well, just as in the primary group.

I hope this clears the waters a bit. I still have to solve my puzzle.

Thanks everyone for the feedback.
Jaime



Quoting "Jaime Pinto" <pinto at scinet.utoronto.ca<mailto:pinto at scinet.utoronto.ca>>:

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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Jaime Pinto
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University of Toronto
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P: 416-978-2755
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