Hi Kent, Slurm v2.5 will permit a more flexible constraint syntax
sbatch --constraint=fat:2,thin:8 ... Then to start steps srun --constraint=fat ... srun --constraint=thin ... You would need to build a hostlist for explicitly put rank 0 on a fat node. Moe Quoting Kent Engström <[email protected]>: > > SLURMers, > > both one of our users and a colleague have been asking recently about > the possibility in sbatch to ask for a fat node (more memory) and then a > couple of other nodes (fat or thin), and then have the batch script > start on the fat node, so that rank 0 is placed there by default by the > MPI. It is the last part that does not seem trivial. > > Is this possible with SLURM as such? If not, what's your favorite > workaround to accomplish this? > > -- > Kent Engström, National Supercomputer Centre, Sweden > [email protected], +46 13 28 4444
