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This file describes changes in recent versions of SLURM. It primarily
documents those changes that are of interest to users and admins.
* Changes in SLURM 1.3.6
========================
-- Add new function to get information for a single job rather than always
getting information for all jobs. Improved performance of some commands.
NOTE: Change in RPC means all nodes in the cluster should be updated
at the same time.
-- In salloc, sbatch, and srun replace --task-mem options with --mem-per-cpu
(--task-mem will continue to be accepted for now, but is not documented).
Replace DefMemPerTask and MaxMemPerTask with DefMemPerCPU, DefMemPerNode,
MaxMemPerCPU and MaxMemPerNode in slurm.conf. Allocate a job's memory memory
at the same time that processors are allocated based upon the --mem or
--mem-per-cpu option rather than when job steps are initiated.
-- Fix processing of auth/munge authtentication key for messages originating
in slurmdbd and sent to slurmctld.
-- If srun is allocating resources (not within sbatch or salloc) and MaxWait
is configured to a non-zero value then wait indefinitely for the resource
allocation rather than aborting the request after MaxWait time.
-- For Moab only: add logic to reap defunct "su" processes that are spawned by
slurmd to load user's environment variables.
-- Added more support for "dumping" account information to a flat file and
read in again to protect data incase something bad happens to the database.
-- Sacct will now report account names for job steps.
-- For AIX: Remove MP_POERESTART_ENV environment variable, disabling
poerestart command. User must explicitly set MP_POERESTART_ENV before
executing poerestart.
-- Put back notification that a job has been allocated resources when it was
pending.
-- Some updates to man page formatting from Gennaro Oliva, ICAR.
-- Smarter loading of plugins (doesn't stat every file in the plugin dir)
-- In sched/backfill avoid trying to schedule jobs on DOWN or DRAINED nodes.
-- forward exit_code from step completion to slurmdbd
-- Add retry logic to socket connect() call from client which can fail
when the slurmctld is under heavy load.
-- Fixed bug when adding associations to add correctly.
-- Added support for associations for user root.
-- For Moab, sbatch --get-user-env option processed by slurmd daemon
rather than the sbatch command itself to permit faster response
for Moab.
-- IMPORTANT FIX: This only effects use of select/cons_res when allocating
resources by core or socket, not by CPU (default for SelectTypeParameter).
We are not saving a pending job's task distribution, so after restarting
slurmctld, select/cons_res was over-allocating resources based upon an
invalid task distribution value. Since we can't save the value without
changing the state save file format, we'll just set it to the default
value for now and save it in Slurm v1.4. This may result in a slight
variation on how sockets and cores are allocated to jobs, but at least
resources will not be over-allocated.
-- Correct logic in accumulating resources by node weight when more than
one job can run per node (select/cons_res or partition shared=yes|force).
-- slurm.spec file updated to avoid creating empty RPMs. RPM now *must* be
built with correct specification of which packages to build or not build.
See the top of the slurm.spec file for information about how to control
package building specification.
-- Set SLURM_JOB_CPUS_PER_NODE for jobs allocated using the srun command.
It was already set for salloc and sbatch commands.
-- Fix to handle suspended jobs that were cancelled in accounting
-- BLUEGENE - fix to only include bps given in a name from the bluegene.conf
file.
-- For select/cons_res: Fix record-keeping for core allocations when more
than one partition uses a node or there is more than one socket per node.
-- In output for "scontrol show job" change "StartTime" header to "EligibleTime"
for pending jobs to accurately describe what is reported.
-- Add more slurmdbd.conf paramters: ArchiveScript, ArchiveAge, JobPurge, and
StepPurge (not fully implemented yet).
-- Add slurm.conf parameter EnforcePartLimits to reject jobs which exceed a
partition's size and/or time limits rather than leaving them queued for a
later change in the partition's limits. NOTE: Not reported by
"scontrol show config" to avoid changing RPCs. It will be reported in
SLURM version 1.4.
-- Added idea of coordinator to accounting. A coordinator can add associations
between exsisting users to the account or any sub-account they are
coordinator to. They can also add/remove other coordinators to those
accounts.
-- Add support for Hostname and NodeHostname in slurm.conf being fully
qualified domain names (by Vijay Ramasubramanian, University of Maryland).
For more information see "man slurm.conf".
* Changes in SLURM 1.3.3
========================
-- Add mpi_openmpi plugin to the main SLURM RPM.
-- Prevent invalid memory reference when using srun's --cpu_bind=cores option
(slurm-1.3.2-1.cea1.patch from Matthieu Hautreux, CEA).
-- Task affinity plugin modified to support a particular cpu bind type: cores,
sockets, threads, or none. Accomplished by setting an environment variable
SLURM_ENFORCE_CPU_TYPE (slurm-1.3.2-1.cea2.patch from Matthieu Hautreux,
CEA).
-- For BlueGene only, log "Prolog failure" once per job not once per node.
-- Reopen slurmctld log file after reconfigure or SIGHUP is received.
-- In TaskPlugin=task/affinity, fix possible infinite loop for slurmd.
-- Accounting rollup works for mysql plugin. Automatic rollup when using
slurmdbd.
-- Copied job stat logic out of sacct into sstat in the future sacct -stat
will be deprecated.
-- Correct sbatch processing of --nice option with negative values.
-- Add squeue formatted print option %Q to print a job's integer priority.
-- In sched/backfill, fix bug that was changing a pending job's shared value
to zero (possibly changing a pending job's resource requirements from a
processor on some node to the full node).
-- Get --ntasks-per-node option working for sbatch command.
Danny Auble
committed
-- BLUEGENE: Added logic to give back a best block on overlapped mode
in test_only mode
-- BLUEGENE: Updated debug info and man pages for better help with the
numpsets option and to fail correctly with bad image request for building
blocks.
-- In sched/wiki and sched/wiki2 properly support Slurm license consumption
(job state reported as "Hold" when required licenses are not available).
-- In sched/wiki2 JobWillRun command, don't return an error code if the job(s)
can not be started at that time. Just return an error message (from
Doug Wightman, CRI).
-- Fix bug if sched/wiki or sched/wiki2 are configured and no job comment is
set.
-- scontrol modified to report partition partition's "DisableRootJobs" value.
-- Fix bug in setting host address for PMI communications (mpich2 only).
-- In sbatch and salloc, change --dependency's one letter option from "-d"
to "-P" (continue to accept "-d", but change the documentation).
-- Only check that task_epilog and task_prolog are runable by the job's
user, not as root.
-- In sbatch, if specifying an alternate directory (--workdir/-D), then
input, output and error files are in that directory rather than the
directory from which the command is executed
-- NOTE: Fully operational with Moab version 5.2.3+. Change SUBMITCMD in
moab.cfg to be the location of sbatch rather than srun. Also set
HostFormat=2 in SLURM's wiki.conf for improved performance.
-- NOTE: We needed to change an RPC from version 1.3.1. You must upgrade
all nodes in a cluster from v1.3.1 to v1.3.2 at the same time.
-- Postgres plugin will work from job accounting, not for association
management yet.
-- For srun/sbatch --get-user-env option (Moab use only) look for "env"
command in both /bin and /usr/sbin (for Suse Linux).
-- Fix bug in processing job feature requests with node counts (could fail
to schedule job if some nodes have not associated features).
-- Added nodecnt and gid to jobcomp/script
-- Insure that nodes select in "srun --will-run" command or the equivalent in
sched/wiki2 are in the job's partition.
-- BLUGENE - changed partition Min|MaxNodes to represent c-node counts
instead of base partitions
-- In sched/gang only, prevent possible invalid memory reference when
slurmctld is reconfigured, e.g. "scontrol reconfig".
-- In select/linear only, prevent invalid memory reference in log message when
nodes are added to slurm.conf and then "scontrol reconfig" is executed.
* Changes in SLURM 1.3.1
========================
-- Correct logic for processing batch job's memory limit enforcement.
-- Fix bug that was setting a job's requeue value on any update of the
job using the "scontrol update" command. The invalid value of an
updated job prevents it's recovery when slurmctld restarts.
-- Add support for cluster-wide consumable resources. See "Licenses"
parameter in slurm.conf man page and "--licenses" option in salloc,
sbatch and srun man pages.
-- Major changes in select/cons_res to support FastSchedule=2 with more
resources configured than actually exist (useful for testing purposes).
-- Modify srun --test-only response to include expected initiation time
for a job as well as the nodes to be allocated and processor count
(for use by Moab).
-- Correct sched/backfill to properly honor job dependencies.
-- Correct select/cons_res logic to allocate CPUs properly if there is
more than one thread per core (previously failed to allocate all cores).
-- Correct select/linear logic in shared job count (was off by 1).
-- Add support for job preeption based upon partition priority (in sched/gang,
preempt.patch from Chris Holmes, HP).
Danny Auble
committed
-- Added much better logic for mysql accounting.
-- Finished all basic functionality for sacctmgr.
-- Added load file logic to sacctmgr for setting up a cluster in one step.
-- NOTE: We needed to change an RPC from version 1.3.0. You must upgrade
all nodes in a cluster from v1.3.0 to v1.3.1 at the same time.
-- NOTE: Work is currently underway to improve placement of jobs for gang
scheduling and preemption.
-- NOTE: Work is underway to provide additional tools for reporting
accounting information.
* Changes in SLURM 1.3.0
========================
-- In sched/wiki2, add processor count to JOBWILLRUN response.
-- Add event trigger for node entering DRAINED state.
-- Build properly without OpenSSL installed (OpenSSL is recommended, but not
required).
-- Added slurmdbd, and modified accounting_storage plugin to talk to it.
Allowing multiple slurm systems to securly store and gather information
not only about jobs, but the system also. See accounting web page for more
information.
* Changes in SLURM 1.3.0-pre11
==============================
-- Restructure the sbcast RPC to take advantage of larger buffers available
in Slurm v1.3 RPCs.
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