Phil,

I believe that 1 core per node is correct.

Maybe let me ask this first: is possible for a single task to use specific
CPUs across several nodes?

Thanks,
Mike

On Tue, Sep 9, 2014 at 10:38 AM, Eckert, Phil <ecke...@llnl.gov> wrote:

>  Mike,
>
>  In your slurm.conf you have Procs=1, (which is the same as CPUS=1) and
> Sockets (if ommited will be inferred from CPUS, default is 1) and
> CoresPerSocket (default is 1)
>
>  So at this point the slurm.conf has a default configuration of 1 core
> per node.
>
>  Phil Eckert
> LLNL
>
>   From: Michal Zielinski <michal.zielin...@uconn.edu>
> Reply-To: slurm-dev <slurm-dev@schedmd.com>
> Date: Tuesday, September 9, 2014 at 6:35 AM
> To: slurm-dev <slurm-dev@schedmd.com>
> Subject: [slurm-dev] Re: "Requested node configuration is not available"
> when using -c
>
>     Josh,
>
>  I believe that *-n *sets the number of tasks. I only want a single task,
> as when a single process uses multiple cores. *srun -n 2 hostname* returns
>
>  linux-slurm2
>  linux-slurm3
>
>  which is definitely not what I want.
>
> Thanks,
>  Mike
>
>
> On Mon, Sep 8, 2014 at 8:07 PM, Josh McSavaney <mcsa...@csh.rit.edu>
> wrote:
>
>>  I believe your slurm.conf is defining 4 nodes with a single logical
>> processor each. You are then trying to allocate two CPUs on a single node
>> with srun, which (according to your slurm.conf) you do not have.
>>
>>  You may want to consider `srun -n 2 hostname` and see where that lands
>> you.
>>
>>  Regards,
>>
>>  Josh McSavaney
>> Bit Flipper
>> Rochester Institute of Technology
>>
>>
>>
>> On Mon, Sep 8, 2014 at 7:42 PM, Christopher Samuel <sam...@unimelb.edu.au
>> > wrote:
>>
>>>
>>> On 09/09/14 07:26, Michal Zielinski wrote:
>>>
>>>  I have a small test cluster (node[1-4]) running slurm 14.03.0 setup with
>>>> CR_CPU and no usage restrictions. Each node has just 1 CPU.
>>>>
>>> [...]
>>>
>>>> But, *srun -c 2 hostname* does not work, and it returns the above error.
>>>>
>>>> I have no idea why I can't dedicate 2 cores to a single job if I can
>>>> dedicate each core individually to a job.
>>>>
>>>
>>> What does "scontrol show node" say?
>>>
>>> cheers,
>>> Chris
>>> --
>>>  Christopher Samuel        Senior Systems Administrator
>>>  VLSCI - Victorian Life Sciences Computation Initiative
>>>  Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545
>>>  http://www.vlsci.org.au/      http://twitter.com/vlsci
>>>
>>
>>
>

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