Llicència:
Sbatch and salloc allocate resources to the job, while srun launches parallel tasks across those resources. When invoked within a job allocation, srun will launch parallel tasks across some or all of the allocated resources. In that case, srun inherits by default the pertinent options of the sbatch or salloc which it runs under. You can then (usually) provide srun different options which will override what it receives by default.
Write an script for sbatch command (see basic example to build it):
#!/bin/bash #SBATCH -J prova_uname10 #SBATCH -p short #SBATCH -N 2 #SBATCH --time=2:00 #SBATCH --sockets-per-node=1 #SBATCH --cores-per-socket=2 #SBATCH --threads-per-core=2 srun -n 8 uname -a >> /homedtic/test/Scripts/uname3.txt
Total cpu’s requested in this script: 2x(1x2x2) = 8
The total number of tasks that will be executed is 8 through 2 nodes, 1 socket per node, 2 cores per socket and 2 threads per core. The result is this:
Linux node011 3.16.0-4-amd64 #1 SMP Debian 3.16.43-2+deb8u5 (2017-09-19) x86_64 GNU/Linux Linux node012 3.16.0-4-amd64 #1 SMP Debian 3.16.43-2+deb8u5 (2017-09-19) x86_64 GNU/Linux Linux node011 3.16.0-4-amd64 #1 SMP Debian 3.16.43-2+deb8u5 (2017-09-19) x86_64 GNU/Linux Linux node011 3.16.0-4-amd64 #1 SMP Debian 3.16.43-2+deb8u5 (2017-09-19) x86_64 GNU/Linux Linux node011 3.16.0-4-amd64 #1 SMP Debian 3.16.43-2+deb8u5 (2017-09-19) x86_64 GNU/Linux Linux node011 3.16.0-4-amd64 #1 SMP Debian 3.16.43-2+deb8u5 (2017-09-19) x86_64 GNU/Linux Linux node011 3.16.0-4-amd64 #1 SMP Debian 3.16.43-2+deb8u5 (2017-09-19) x86_64 GNU/Linux Linux node011 3.16.0-4-amd64 #1 SMP Debian 3.16.43-2+deb8u5 (2017-09-19) x86_64 GNU/Linux Linux node012 3.16.0-4-amd64 #1 SMP Debian 3.16.43-2+deb8u5 (2017-09-19) x86_64 GNU/Linux