Specific Types of Nodes
SLURM allows running a job on specific types of compute nodes to accommodate special hardware requirements (e.g. a certain CPU or GPU type, etc.)
Cluster nodes have a set of descriptive features assigned to them, and users can specify which of these features are required by their job by using the constraint option at submission time. Only nodes having features matching the job constraints will be used to satisfy the request.
Example: a job requires a compute node in an "A" sub-cluster:
sbatch --nodes=1 --ntasks=128 --constraint=A myjobsubmissionfile.subCompute node allocated:
a003.negishiFeature constraints can be used for both batch and interactive jobs, as well as for individual job steps inside a job. Multiple constraints can be specified with a predefined syntax to achieve complex request logic (see detailed description of the '--constraint' option in man sbatch or online Slurm documentation).
Refer to Detailed Hardware Specification section for list of available sub-cluster labels, their respective per-node memory sizes and other hardware details. You could also use sfeatures command to list available constraint feature names for different node types.