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 >>> >> >> >