Release Notes for Slurm 25.05

Upgrading

Slurm 25.05 supports upgrading directly from 24.11, 24.05, and 23.11.

See the Upgrade Guide for further details.

Optional support for TLS encryption for all Slurm RPC traffic.
Support for defining multiple topologies which can be applied to specific partitions.
Support for tracking and allocating hierarchical resources (beta).
Dynamic nodes can be dynamically added to the network topologies.
Added support for an OR operator in license requests.
sacctmgr - Add support for dumping and loading QOSes.
slurmrestd - Add support for TLS encryption to listening sockets.
srun - Add new --wait-for-children option to keep the step running until all launched processes have been launched (cgroup/v2 only).
topology/block - Permit gaps within the block definitions.
jobcomp/kafka - New option to send job information at job start in addition to job completion.
switch/hpe_slingshot - Support for > 252 ranks per node.
switch/hpe_slingshot - Support for mTLS authentication to the fabric manager.

Autodetect the available cpus, and automatically set the connection management thread pool size to 2x that value. The “conmgr_threads” settings can be used to override this.
jobcomp/elasticsearch and jobcomp/kafka - Stop sending the batch script as part of the message by default. A new “send_script” option has been added if the batch script should be sent.

Removed support for “FrontEnd” mode of operation. (Required compilation with “–enable-front-end”.)
Marked cgroup/v1 support as deprecated.