[torquedev] Confused about processes again
SimonT at mail.muni.cz
Fri Feb 26 00:40:12 MST 2010
>> >> I'm still battling the processes support in Torque. I can't
>> make heads
>> >> or tails of it. What is the correct semantics?
>> >> - when can a node accept a shared job?
>> >> - when can a node accept an exclusive job?
>> > Jobs aren't shared or exclusive. Nodes are.
>> What I was referring to was shared vs. exclusive requests:
>> qsub -l nodes=1:ppn=2#shared
>> I have never seen anyone do this
> It's been more than 10 years since I saw anybody do that. It was needed
> back in the days before OpenPBS added the :ppn=N component of the nodes
> resource, but those days are loooooong past.
This is making my head ache :)
OK then, I will have to give it a thought.
My problem is that our users also require node-exclusive jobs. Such jobs
always use the whole node regardless of the amount of resources they
actually use (for example I/O heavy jobs use this).
My current approach is using the #shared for normal jobs and exclusive
for node-exclusive jobs, with only one process on each node and cpus
stored as resources on each node. But this approach makes few
incompatible changes into the node search/checking logic of the server.
Mgr. Simon Toth
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