[slurm-users] Reset Fair-share tree account values

[Sebastian T Smith]

I agree that resetting to a non-zero value would be helpful (vote_count++).  That's how I originally stumbled upon this feature.  We bill for system time based on usage per month, and there are cases where "refunds" need to be issued.  (Usually high-tech issues, like, rebooting the wrong node 🙁).

- Sebastian

--

[University of Nevada, Reno]<http://www.unr.edu/>
Sebastian Smith
High-Performance Computing Engineer
Office of Information Technology
1664 North Virginia Street
MS 0291

work-phone: 775-682-5050<tel:7756825050>
email: stsmith at unr.edu<mailto:stsmith at unr.edu>
website: http://rc.unr.edu<http://rc.unr.edu/>

________________________________
From: slurm-users <slurm-users-bounces at lists.schedmd.com> on behalf of Paul Edmon <pedmon at cfa.harvard.edu>
Sent: Thursday, July 16, 2020 10:15 AM
To: slurm-users at lists.schedmd.com <slurm-users at lists.schedmd.com>
Subject: Re: [slurm-users] Reset Fair-share tree account values


Wow, nice find.  I wasn't even aware of that one.  Hopefully they will support the ability to reset to other values in the future as that would be a handy ability.


-Paul Edmon-


On 7/16/2020 12:56 PM, Sebastian T Smith wrote:
`sacctmgr` can be used to reset the accrued RawUsage value.  Example usage:

# sacctmgr modify user <user name> where Account=<account name> set RawUsage=0

Review the `sacctmgr` documentation for more details: https://slurm.schedmd.com/sacctmgr.html<https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fslurm.schedmd.com%2Fsacctmgr.html&data=01%7C01%7Cstsmith%40unr.edu%7C0f36290b63084fdfc19c08d829ac02de%7C523b4bfc0ebd4c03b2b96f6a17fd31d8%7C1&sdata=IaS0v2ahlQ2FTf8vWK%2BGAcRgmbaaMPCoQe6q8oB%2BRAQ%3D&reserved=0>

Best,

Sebastian

--

[University of Nevada, Reno]<http://www.unr.edu/>
Sebastian Smith
High-Performance Computing Engineer
Office of Information Technology
1664 North Virginia Street
MS 0291

work-phone: 775-682-5050<tel:7756825050>
email: stsmith at unr.edu<mailto:stsmith at unr.edu>
website: http://rc.unr.edu<https://nam04.safelinks.protection.outlook.com/?url=http%3A%2F%2Frc.unr.edu%2F&data=01%7C01%7Cstsmith%40unr.edu%7C0f36290b63084fdfc19c08d829ac02de%7C523b4bfc0ebd4c03b2b96f6a17fd31d8%7C1&sdata=WorqqFFRZHuvJAC9pudwsYgQGV0aMhLCq6IiOqeb9Os%3D&reserved=0>

________________________________
From: slurm-users <slurm-users-bounces at lists.schedmd.com><mailto:slurm-users-bounces at lists.schedmd.com> on behalf of Paul Edmon <pedmon at cfa.harvard.edu><mailto:pedmon at cfa.harvard.edu>
Sent: Thursday, July 16, 2020 5:49 AM
To: slurm-users at lists.schedmd.com<mailto:slurm-users at lists.schedmd.com> <slurm-users at lists.schedmd.com><mailto:slurm-users at lists.schedmd.com>
Subject: Re: [slurm-users] Reset Fair-share tree account values


Also as a side, is there an official name for the other fairshare system?  I guess the official documentation calls it Classic Fairshare, like Classic Coke :). I hate to call it old as we use it here and will continue to use it. We have no intention to moving to FairTree because we've only recently gotten our users used to the current system.  FairTree frankly doesn't fit our model and is too complicated to explain for most of our users who have just figured out how the current system works.  So while FairTree is the default the other system is still in wide use and I think still very useful.

-Paul Edmon-

On 7/16/2020 8:42 AM, Paul Edmon wrote:

A trick you can use to reset certain users (which I have used before) is to simply delete them from the slurmdb and then readd them.  At least under the other fairshare system, which is what our site uses, that would remove their usage and they would have 0 usage when they returned.  I'm assuming fairtree works the same way.

-Paul Edmon-

On 7/16/2020 5:49 AM, Gestió Servidors wrote:

Hello,



I will try to explain an scenario that occurs in my SLURM cluster. An important number of users (accounts) belongs to students of a certain subject. That subject is 6 month duration. When subject end, I “reset” user folders, clean all data, reset passwords and, in next academic year, I offer same users (accounts) to new students, so they have their $HOME cleans and no old data. However, in SLURM, what old users could execute modified values we can seen in “sshare -l -a”, specifically “RawUsage, NormUsage, EffectvUsage, FairShare, LevelFS”. After reading some documents, I “understand” that these values are calculated to give more or less priority to a user (account) job depending its features, cluster use, total number of CPUs, cores, etc... so, when new users take that accounts, that values should be reset as a new user in the cluster... but I think that new users are dragging from the past.



My slurm.conf contains these parameters:

PriorityType=priority/multifactor

PriorityDecayHalfLife=7-0

PriorityCalcPeriod=5

PriorityUsageResetPeriod=QUARTERLY

PriorityFavorSmall=NO

PriorityMaxAge=7-0

PriorityWeightAge=10000

PriorityWeightFairshare=1000000

PriorityWeightJobSize=1000

PriorityWeightPartition=1000

PriorityWeightQOS=0



As you can see, “PriorityUsageResetPeriod” is configured as QUARTERLY, so after reading some documents and examples, I “think” that fair-share tree, priorities and user assigned job priority is “reset” and turned to initial values... Am I wrong or am I in the correct way?

But, either way, I would like to reset that values only for some users (accounts), not for all SLURM users/accounts. Is it possible?



Thanks.
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