[Mauiusers] Backfill and node reservation

Arnau Bria arnaubria at pic.es
Mon Nov 15 10:12:12 MST 2010


Hi Denis and all,


I tried to reproduce it and here are results:

# showconfig |grep -i backfill
BACKFILLPOLICY[0]                 NONE
BACKFILLDEPTH[0]                  0
BACKFILLPROCFACTOR[0]             0
BACKFILLMAXSCHEDULES[0]           10000
BACKFILLMETRIC[0]                 PROCS


$ pbsnodes td115.pic.es
td115.pic.es
     state = offline
     np = 8
     properties = slc5_x64
     ntype = cluster
     jobs = 0/13890645.pbs02.pic.es, 1/13892037.pbs02.pic.es, 2/13894222.pbs02.pic.es, 3/13894254.pbs02.pic.es, 4/13892138.pbs02.pic.es, 5/13891930.pbs02.pic.es, 6/13892881.pbs02.pic.es



$  qsub -q short -l nodes=td115.pic.es:ppn=8 -N backfill_test sleep.sh 
13894790.pbs02.pic.es

$pbsnodes -c td115.pic.es

> what does a diagnose -p report?
> Is it possible that the jobs which are running before your highest
> priority job are not being backfilled but having a higher priority
> instead due to the weights of the other metrics?
> I see that the CREDWEIGHT is set to 1 while QOS for example is set to
> 100.


Job                    PRIORITY*   Cred( User:Group:Class)    FS( User:Group:  QOS)
             Weights   --------       1(    1:    1:    1)     1(    2:   10:  100)

13894790                 100000   100.0(10000:  0.0:  0.0)   0.0(  0.0:  0.0:  0.0)
13894957                  -134     0.0(  0.0:  0.0:  0.0) 100.0(  0.0: -0.3:-133.)
13894958                  -134     0.0(  0.0:  0.0:  0.0) 100.0(  0.0: -0.3:-133.)
[...]

**** my job is first.
**** farm is at 99,9%, only that slot is free.

# pbsnodes td115.pic.es
td115.pic.es
     state = job-exclusive
     np = 8
     properties = slc5_x64
     ntype = cluster
     jobs = 0/13890645.pbs02.pic.es, 1/13892037.pbs02.pic.es, 2/13894222.pbs02.pic.es, 3/13894254.pbs02.pic.es, 4/13892138.pbs02.pic.es, 5/13891930.pbs02.pic.es, 6/13892881.pbs02.pic.es, 7/13894957.pbs02.pic.es


> 
> Also there are some groups with priority really high ( 100000)
My group.


Does it help in any way?


Cheers,
Arnau


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