[GE users] ram limiting users per node

reuti reuti at staff.uni-marburg.de
Tue Mar 2 12:17:32 GMT 2010


Hi,

Am 02.03.2010 um 12:57 schrieb danielgoolsby:

> I have about 40 dual quad core, half have 24 gigs of ram, other  
> half has 48 gigs of ram a piece.  most users jobs can fill up 8  
> slots per node easily and not use much ram, but I do have a few  
> users that have some ram intensive matlab jobs that take up about  
> 6-8 gigs of ram per job.
>
> obviously if someone submitted enough jobs (in the grid's current  
> config), they'll put 8 slots on one machine and you'd kill the  
> machine due to ram limitation.
>
> what i'm curious is how do you specify max ram usage per user per  
> node?  if the job gets initially submitted and says it uses 1 gig  
> of ram, and over time it grows to 8 gigs,  if there was a  
> limitation in place, what happens?  does all 8 slots fill up, then  
> if the user violates the ram contraints, does it just suspend jobs  
> until some other processes finishes?

a usual approach is:

http://gridengine.info/2009/12/01/adding-memory-requirement-awareness- 
to-the-scheduler

You could even limit the maximum per user per node with an RQS, but I  
think this is not necessary at the first place.

-- Reuti


> -- 
> --daniel
> --

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