Release Notes
The following are the contents of the RELEASE_NOTES file as distributed with the Slurm source code for this release. Please refer to the NEWS include alongside the source as well for more detailed descriptions of the associated changes, and for bugs fixed within each maintenance release.
RELEASE NOTES FOR SLURM VERSION 23.02
IMPORTANT NOTES:
If using the slurmdbd (Slurm DataBase Daemon) you must update this first.
NOTE: If using a backup DBD you must start the primary first to do any
database conversion, the backup will not start until this has happened.
The 23.02 slurmdbd will work with Slurm daemons of version 21.08 and above.
You will not need to update all clusters at the same time, but it is very
important to update slurmdbd first and having it running before updating
any other clusters making use of it.
Slurm can be upgraded from version 21.08 or 22.05 to version 23.02 without loss
of jobs or other state information. Upgrading directly from an earlier version
of Slurm will result in loss of state information.
All SPANK plugins must be recompiled when upgrading from any Slurm version
prior to 23.02.
NOTE: PMIx v1.x is no longer supported.
HIGHLIGHTS
==========
-- Make scontrol reconfigure and sending a SIGHUP to the slurmctld behave the
same. If you were using SIGHUP as a 'lighter' scontrol reconfigure to rotate
logs please update your scripts to use SIGUSR2 instead.
-- burst_buffer/lua - pass the job's UID and GID to slurm_bb_pre_run,
slurm_bb_data_in, slurm_bb_post_run, and slurm_bb_data_out in
burst_buffer.lua.
-- Change cloud nodes to show by default. PrivateData=cloud is no longer
needed.
-- sreport - Count planned (FKA reserved) time for jobs running in IGNORE_JOBS
reservations. Previously was lumped into IDLE time.
-- job_container/tmpfs - Support running with an arbitrary list of private
mount points (/tmp and /dev/shm are the default, but not required).
-- job_container/tmpfs - Set more environment variables in InitScript.
-- Make all cgroup directories created by Slurm owned by root. This was the
behavior in cgroup/v2 but not in cgroup/v1 where by default the step
directories ownership were set to the user and group of the job.
-- accounting_storage/mysql - change purge/archive to calculate record ages
based on end time, rather than start or submission times.
-- job_submit/lua - add support for log_user() from slurm_job_modify().
-- Run the following scripts in slurmscriptd instead of slurmctld:
ResumeProgram, ResumeFailProgram, SuspendProgram, ResvProlog, ResvEpilog,
and RebootProgram (only with SlurmctldParameters=reboot_from_controller).
-- Only permit changing log levels with 'srun --slurmd-debug' by root
or SlurmUser.
-- slurmctld will fatal() when reconfiguring the job_submit plugin fails.
-- Add PowerDownOnIdle partition option to power down nodes after nodes become
idle.
-- Add "[jobid.stepid]" prefix from slurmstepd and "slurmscriptd" prefix from
slurmcriptd to Syslog logging. Previously was only happening when logging
to a file.
-- Add purge and archive functionality for job environment and job batch script
records.
-- Extend support for Include files to all "configless" client commands.
-- Make node weight usable for powered down and rebooting nodes.
-- Removed 'launch' plugin.
-- Add "Extra" field to job to store extra information other than a comment.
CONFIGURATION FILE CHANGES (see appropriate man page for details)
=====================================================================
-- job_container.conf - Added "Dirs" option to list desired private mount
points.
-- node_features plugins - invalid users specified for AllowUserBoot will now
result in fatal() rather than just an error.
-- Deprecate AllowedKmemSpace, ConstrainKmemSpace, MaxKmemPercent, and
MinKmemSpace.
-- Allow jobs to queue even if the user is not in AllowGroups when
EnforcePartLimits=no is set. This ensures consistency for all the Partition
access controls, and matches the documented behavior for EnforcePartLimits.
-- Add InfluxDBTimeout parameter to acct_gather.conf.
-- job_container/tmpfs - add support for expanding %h and %n in BasePath.
-- slurm.conf - Removed SlurmctldPlugstack option.
-- Add new SlurmctldParameters=validate_nodeaddr_threads= option to
allow concurrent hostname resolution at slurmctld startup.
-- Add new AccountingStoreFlags=job_extra option to store a job's extra field
in the database.
-- Add new "defer_batch" option to SchedulerParameters to only defer
scheduling for batch jobs.
-- Add new DebugFlags option 'JobComp' to replace 'Elasticsearch'.
COMMAND CHANGES (see man pages for details)
===========================================
-- sacctmgr - no longer force updates to the AdminComment, Comment, or
SystemComment to lower-case.
-- sinfo - Add -F/--future option to sinfo to display future nodes.
-- sacct - Rename 'Reserved' field to 'Planned' to match sreport and the
nomenclature of the 'Planned' node.
-- scontrol - advanced reservation flag MAINT will no longer replace nodes,
similar to STATIC_ALLOC
-- sbatch - add parsing for #PBS -d and #PBS -w.
-- scontrol show assoc_mgr will show username(uid) instead of uid in
QoS section.
-- Add strigger --draining and -R/--resume options.
-- Change --oversubscribe and --exclusive to be mutually exclusive for job
submission. Job submission commands will now fatal if both are set.
Previously, these options would override each other, with the last one in
the job submission command taking effect.
-- scontrol - Requested TRES and allocated TRES will now always be printed when
showing jobs, instead of one TRES output that was either the requested or
allocated.
-- srun --ntasks-per-core now applies to job and step allocations. Now, use of
--ntasks-per-core=1 implies --cpu-bind=cores and --ntasks-per-core>1 implies
--cpu-bind=threads.
-- salloc/sbatch/srun - Check and abort if ntasks-per-core > threads-per-core.
-- scontrol - Add ResumeAfter= option to "scontrol update nodename=".
-- Add a new "nodes=" argument to scontrol setdebug to allow the debug level
on the slurmd processes to be temporarily altered.
-- Make it so scrontab prints client-side the job_submit() err_msg (which can
be set i.e. by using the log_user() function for the lua plugin).
-- scontrol - Reservations will not be allowed to have STATIC_ALLOC or MAINT
flags and REPLACE[_DOWN] flags simultaneously.
-- scontrol - Reservations will only accept one reoccurring flag when
being created or updated.
-- scontrol - A reservation cannot be updated to be reoccurring if it is
already a floating reservation.
-- squeue - removed unused '%s' and 'SelectJobInfo' formats.
-- squeue - align print format for exit and derived codes with that of other
components (:).
-- sacct - Add --array option to expand job arrays and display array tasks on
separate lines.
API CHANGES
===========
-- job_container plugins - container_p_stepd_create() function signature
replaced uint32_t uid with stepd_step_rec_t* step.
-- gres plugins - gres_g_get_devices() function signature replaced pid_t pid
with stepd_step_rec_t* step.
-- cgroup plugins - task_cgroup_devices_constrain() function signature removed
pid_t pid.
-- task plugins - replace task_p_pre_set_affinity(), task_p_set_affinity(), and
task_p_post_set_affinity() with task_p_pre_launch_priv() like it was back in
slurm 20.11.
-- Allow for concurrent processing of job_submit_g_submit() and
job_submit_g_modify() calls. If your plugin is not capable of concurrent
operation you must add additional locking within your plugin.
-- Removed return value from slurm_list_append().
-- The List and ListIterator types have been removed in favor of list_t and
list_itr_t respectively.
-- burst buffer plugins - add bb_g_build_het_job_script().
bb_g_get_status() - added authenticated UID and GID.
bb_g_run_script() - added job_info argument.
-- burst_buffer.lua - Pass UID and GID to most hooks. Pass job_info (detailed
job information) to many hooks. See etc/burst_buffer.lua.example for a
complete list of changes. WARNING: Backwards compatibility is broken for
slurm_bb_get_status: UID and GID are passed before the variadic arguments.
If UID and GID are not explicitly listed as arguments to
slurm_bb_get_status(), then they will be included in the variadic arguments.
Backwards compatibility is maintained for all other hooks because the new
arguments are passed after the existing arguments.
-- node_features plugins - node_features_p_reboot_weight() function removed.