The format has changed a bit, since none of our RawShares column is ‘parent’.

But you can test this to be certain.

If your cluster already has jobs pending, have bsmith (who has zero usage) and 
csmith (who has a lot of usage, relatively) each submit several jobs into the 
pending queue. Alternatively, have bsmith and csmith submit jobs with larger 
resource requests: jobs that are large enough to automatically go into a 
pending state due to lack of resources. Those might be jobs that request the 
whole cluster, even.

bsmith’s jobs should get a higher priority as seen from sprio, and bsmith’s 
jobs should start earlier than csmith’s.

From: Drucker, Daniel <ddruc...@mclean.harvard.edu>
Date: Friday, August 9, 2024 at 3:11 PM
To: Renfro, Michael <ren...@tntech.edu>
Cc: slurm-users@lists.schedmd.com <slurm-users@lists.schedmd.com>
Subject: Re: [slurm-users] FairShare if there's only one account?

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opening attachments, clicking links, or responding to requests.

________________________________
Looks like this:

$ sshare -a -A mic
Account                    User  RawShares  NormShares    RawUsage  
EffectvUsage  FairShare
-------------------- ---------- ---------- ----------- ----------- 
------------- ----------
mic                                    120    0.991736    55524598      1.000000
 mic                   asmith     parent    0.991736     2532311      0.045607  
 0.983871
 mic                  bsmith     parent    0.991736           0      0.000000   
0.983871
 mic                   csmith     parent    0.991736     3265529      0.058805  
 0.983871
 mic                 djones     parent    0.991736           0      0.000000   
0.983871
 mic                     ejones     parent    0.991736     2210952      
0.039820   0.983871
...etc etc etc...

Does that look right?





On Aug 9, 2024, at 4:05 PM, Renfro, Michael via slurm-users 
<slurm-users@lists.schedmd.com> wrote:


        External Email - Use Caution

I don’t have any 21.08 systems to verify with, but that’s how I remember it. 
Use “sshare -a -A mic” to verify. You should see both a RawShares and a 
NormShares column for each user. By default they’ll all have the same value, 
but they can be adjusted if needed.

From: Drucker, Daniel via slurm-users 
<slurm-users@lists.schedmd.com<mailto:slurm-users@lists.schedmd.com>>
Date: Friday, August 9, 2024 at 1:39 PM
To: slurm-users@lists.schedmd.com<mailto:slurm-users@lists.schedmd.com> 
<slurm-users@lists.schedmd.com<mailto:slurm-users@lists.schedmd.com>>
Subject: [slurm-users] FairShare if there's only one account?
External Email Warning

This email originated from outside the university. Please use caution when 
opening attachments, clicking links, or responding to requests.

________________________________
Simple question:

Does FairShare still work if every user is under one account? E.g.:

$ sacctmgr show assoc format=Account,User
   Account       User
---------- ----------
      root
      root       root
       mic
       mic   asmith
       mic  bsmith
       mic   csmith
       mic djones
       mic     ejones
       mic     frubble


Will it divide time up fairly between the users? I have:

PriorityType=priority/multifactor
PriorityFavorSmall=YES
PriorityWeightAge=50000
PriorityWeightFairshare=100000
PriorityWeightJobSize=0
PriorityWeightQOS=0

In 21.08.8.



--
Daniel M. Drucker, Ph.D.
Director of IT, MGB Imaging at Belmont
McLean Hospital, a Harvard Medical School Affiliate

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