[GE users] how to define the nodes?

Ryoji Takahashi ryoji at cct.lsu.edu
Thu Jan 17 21:43:49 GMT 2008


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thanks,
no, I don't use PBS, I just wanted to find out the PBS "like"
specification, nodes per processors in SGE.
I should look at allocation rules for this.

ryoji.

Reuti wrote:
> Hi,
>
> Am 17.01.2008 um 17:01 schrieb Ryoji Takahashi:
>
>> I am working in the University Tulsa.
>> In here, we have 12 quad cores (96 processors) cluster.
>> They are just putting Inifiniband with SGE.
>>
>> I am looking at other sources, etc, however, I cannot find so far any,
>> I decide to ask in here.  Probably, someone knows,
>>
>> so my question is, first, we are try to using mvapich-0.9.9 (OSU)
>> for parallel jobs.
>>
>> in SGE so far, -pe mpich  # processors number
>> is there no definition for the nodes?
>> , i.e. in PBS, there is -l nodes=#:ppn=#
>
> why are you using this in PBS?
>
>> so we can use mpirun -np #processors number.
>
> Yes, this is the same number as you requested in "-pe mpich  # 
> processors number" and you can use "mpirun -np #processors number" in 
> your jobscript.
>
> To have it generic you can use "mpirun -np $NSLOTS" in your jobscript.
>
>> In SGE, is there similar definition?  How SGE handle nodes
>> and processors?
>>
>> I was looking this answer, but I didn't find so far any?
>
> In SGE the allocation of number of slots per node is in the PE 
> definition. So maybe you need two PEs:
>
> - one with "allocation_rule 1"
>
> - one with "allocation_rule 2"
>
> if youn want to have one or two processes per node for this job. 
> Otherwise you can use $round_robin if you don't care.
>
> -- Reuti
>
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