Ticket 191 - salloc -n behavior
Summary: salloc -n behavior
Status: RESOLVED FIXED
Alias: None
Product: Slurm
Classification: Unclassified
Component: Bluegene select plugin (show other tickets)
Version: 2.4.x
Hardware: IBM BlueGene Linux
: 3 - Medium Impact
Assignee: Danny Auble
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Reported: 2012-12-18 10:13 MST by Don Lipari
Modified: 2012-12-18 10:52 MST (History)
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Description Don Lipari 2012-12-18 10:13:02 MST 
While we worked with you (bugs 157 and 166) to obtain the correct behavior for srun task options, there is now an inconsistency with how salloc works.

While a straight srun -n64 will correctly allocate 4 nodes, salloc -n64 allocates 64 nodes.

While a straight srun -N1 -n64 will correctly complain "This isn't a valid request without --overcommit", salloc -N1 -n64 succeeds and allocates 64 nodes.

Is there a rationale for this discrepancy or is it a bug?
Comment 1 Danny Auble 2012-12-18 10:28:52 MST 
You shouldn't get 64 nodes there.  I'll see what I can find.  I am guessing this was always the case with salloc and not directly related to anything we did with the 2 bugs you mention here.
Comment 2 Danny Auble 2012-12-18 10:52:01 MST 
This is fixed in 2.5.  It was referencing code that only applied to an L or P system.  sbatch was affected in the same way.

If you want to backport it to 2.4 the patch is here...

https://github.com/SchedMD/slurm/commit/3e89da1164312ab8a0d049cb70931347942340fa