[GE users] node load and selection

reuti reuti at staff.uni-marburg.de
Thu Apr 1 10:19:11 BST 2010


Hi,

Am 01.04.2010 um 08:26 schrieb igardais:

> Some of my users do not understand how SGE selects (or not) nodes for execution.
> In my setup, the PE they use is set to $fill_up and the queue is set to 'seq_no 0' (all nodes are equals) and 'load_thresholds np_load_avg=0.95' (the node have to be fully loaded to be declared in 'alarm' state).
> 
> According to their saying, jobs that could have been run on 2 nodes are split over 3 or 4 nodes (not always, but sometimes).
> 
> What can I do to avoid this ?
> Lower the load_thresholds ?
> Which explanation can I gave them ? I'd like not to go too deep in SGE-related selection algorithm ...

do you request any other resource; any load on the other machines? You can force $fill_up by setting up this:

http://blogs.sun.com/sgrell/entry/grid_engine_scheduler_hacks_least

-- Reuti


> Thanks,
> Ionel
> 
>

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