[slurm-users] Slurm version 23.11 is now available

Tim Wickberg tim at schedmd.com
Tue Nov 21 23:06:44 UTC 2023

We are pleased to announce the availability of the Slurm 23.11 release.

To highlight some new features in 23.11:

- Substantially overhauled the SlurmDBD association management code. For 
clusters updated to 23.11, account and user additions or removals are 
significantly faster than in prior releases.

- Overhauled 'scontrol reconfigure' to prevent configuration mistakes 
from disabling slurmctld / slurmd. Instead, an error will be returned, 
and the running configuration will persist. This does require updates to 
the systemd service files to use the --systemd option to slurmctld / slurmd.

- Added a new internal auth/cred plugin - "auth/slurm". This builds off 
the prior auth/jwt model, and permits operation of the slurmdbd and 
slurmctld without access to full directory information with a suitable 

- Added a new --external-launcher option to srun, which is automatically 
set by common MPI launcher implementations and ensures processes using 
those non-srun launchers have full access to all resources allocated on 
each node.

- Reworked the dynamic/cloud modes of operation to allow for "fanout" - 
where Slurm communication can be automatically offloaded to compute 
nodes for increased cluster scalability.

- Added initial official Debian packaging support.

- Overhauled and extended the Reservation subsystem to allow for most of 
the same resource requirements as are placed on the job. Notably, this 
permits reservations to now reserve GRES directly.

The "Slurm 23.02, 23.11, and Beyond" presentation from the Slurm 
Community BoF at SC23 (https://slurm.schedmd.com/publications.html) has 
an overview of this release.

The Slurm documentation at https://slurm.schedmd.com has also been 
updated to the 23.11 release. (Older versions can be found in the 
archive, linked from the main documentation page.)

Slurm can be downloaded from https://www.schedmd.com/downloads.php .

- Tim

Tim Wickberg
Chief Technology Officer, SchedMD LLC
Commercial Slurm Development and Support

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