SLURMNODELIST

SLURMNODELIST is a term used to denote the list of compute nodes allocated to a Slurm job or job step. In Slurm environments, this information is exposed to the running job via the SLURM_NODELIST environment variable, which contains a compact representation of the allocated nodes.

Format and representation: The SLURM_NODELIST value uses Slurm’s hostlist syntax, combining individual node names and numeric ranges. Examples include node01,node02,node[03-05], or cluster[01-10]. Depending on the cluster configuration, hostnames may be shown as fully qualified names or with shorter forms.

Usage: The node list can be read by scripts to tailor behavior to the allocation. Printing the value with echo "$SLURM_NODELIST" shows the allocation in its compact form. To obtain a flat list of hostnames, commands such as scontrol show hostnames "$SLURM_NODELIST" are used. This expanded list can be iterated over to perform per-node actions or to distribute work explicitly.

Notes: SLURMNODELIST is not an official separate variable in Slurm’s documentation; the canonical variable is SLURM_NODELIST. The concatenated form without the underscore appears in some documents or scripts as a shorthand referring to the same allocation information. The variable is available within job environments, including batch scripts and interactive steps launched by srun, and reflects the current allocation for the running task.

See also: SLURM_NODELIST, environment variables in Slurm, scontrol show hostnames.