Slurm Workload Manager

Slurm
Slurm
Developer(s)	SchedMD
Stable release	24.11.5 / 7 May 2025
Repository	github.com/SchedMD/slurm ;
Written in	C
Operating system	Linux
Type	Job Scheduler for Clusters and Supercomputers
License	GNU General Public License
Website	slurm.schedmd.com

The Slurm Workload Manager, formerly known as Simple Linux Utility for Resource Management (SLURM), or simply Slurm, is a free and open-source job scheduler for Linux and Unix-like kernels, used by many of the world's supercomputers and computer clusters.

It provides three key functions:

allocating exclusive and/or non-exclusive access to resources (computer nodes) to users for some duration of time so they can perform work,
providing a framework for starting, executing, and monitoring work, typically a parallel job such as Message Passing Interface (MPI) on a set of allocated nodes, and
arbitrating contention for resources by managing a queue of pending jobs.

Slurm is the workload manager on about 60% of the TOP500 supercomputers.^[2]

Slurm uses a best fit algorithm based on Hilbert curve scheduling or fat tree network topology in order to optimize locality of task assignments on parallel computers.^[3]

^ "[slurm-announce] Slurm versions 24.11.5, 24.05.8, and 23.11.11 are now available (CVE-2025-43904)". 7 May 2025. Archived from the original on 26 May 2025.
^ "Running a Job on HPC using Slurm | HPC | USC". hpcc.usc.edu. Archived from the original on 2019-03-06. Retrieved 2019-03-05.
^ Pascual, Jose Antonio; Navaridas, Javier; Miguel-Alonso, Jose (2009). Effects of Topology-Aware Allocation Policies on Scheduling Performance. Job Scheduling Strategies for Parallel Processing. Lecture Notes in Computer Science. Vol. 5798. pp. 138–144. doi:10.1007/978-3-642-04633-9_8. ISBN 978-3-642-04632-2.