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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.
-- 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.
* 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.
-- In scontrol, show job's Requeue value, permit change of Requeue and Comment
values.
-- In slurmctld job record, add QOS (quality of service) value for accounting
purposes with Maui and Moab.
-- Log to a job's stderr when it is being cancelled explicitly or upon reaching
it's time limit.
-- Only permit a job's account to be changed while that job is PENDING.
-- Fix race condition in job suspend/resume (slurmd.sus_res.patch from HP).
* Changes in SLURM 1.3.0-pre10
==============================
-- Add support for node-specific "arch" (architecture) and "os" (operating
system) fields. These fields are set based upon values reported by the
slurmd daemon on each compute node using SLURM_ARCH and SLURM_OS environment
variables (if set, the uname function otherwise) and are intended to support
changes in real time changes in operating system. These values are reported
by "scontrol show node" plus the sched/wiki and sched/wiki2 plugins for Maui
and Moab respectively.
-- In sched/wiki and sched/wiki2: add HostFormat and HidePartitionJobs to
"scontrol show config" SCHEDULER_CONF output.
-- In sched/wiki2: accept hostname expression as input for GETNODES command.
-- Add JobRequeue configuration parameter and --requeue option to the sbatch
command.
-- Add HealthCheckInterval and HealthCheckProgram configuration parameters.
-- Add SlurmDbdAddr, SlurmDbdAuthInfo and SlurmDbdPort configuration parameters.
-- Modify select/linear to achieve better load leveling with gang scheduler.
-- Develop the sched/gang plugin to support select/linear and
select/cons_res. If sched/gang is enabled and Shared=FORCE is configured
for a partition, this plugin will gang-schedule or "timeslice" jobs that
share common resources within the partition. Note that resources that are
shared across partitions are not gang-scheduled.
-- Add EpilogMsgTime configuration parameter. See "man slurm.conf" for details.
-- Increase default MaxJobCount configuration parameter from 2000 to 5000.
-- Move all database common files from src/common to new lib in src/database.
-- Move sacct to src/accounting added sacctmgr for scontrol like operations
to accounting infrastructure.
-- Basic functions of sacctmgr in place to make for administration of
accounting.
-- Moved clusteracct_storage plugin to accounting_storage plugin,
jobacct_storage is still it's own plugin for now.
-- Added template for slurm php extention.
-- Add infrastructure to support allocation of cluster-wide licenses to jobs.
Full support will be added some time after version 1.3.0 is released.
-- In sched/wiki2 with select/bluegene, add support for WILLRUN command
to accept multiple jobs with start time specifications.
* Changes in SLURM 1.3.0-pre9
=============================
-- Add spank support to sbatch. Note that spank_local_user() will be called
with step_layout=NULL and gid=SLURM_BATCH_SCRIPT and spank_fini() will
be called immediately afterwards.
Danny Auble
committed
-- Made configure use mysql_config to find location of mysql database install
Removed bluegene specific information from the general database tables.
-- Re-write sched/backfill to utilize new will-run logic in the select
plugins. It now supports select/cons_res and all job options (required
nodes, excluded nodes, contiguous, etc.).
-- Modify scheduling logic to better support overlapping partitions.
-- Add --task-mem option and remove --job-mem option from srun, salloc, and
sbatch commands. Enforce step memory limit, if specified and there is
no job memory limit specified (--mem). Also see DefMemPerTask and
MaxMemPerTask in "man slurm.conf". Enforcement is dependent upon job
accounting being enabled with non-zero value for JoabAcctGatherFrequency.
-- Change default node tmp_disk size to zero (for diskless nodes).
* Changes in SLURM 1.3.0-pre8
=============================
-- Modify how strings are packed in the RPCs, Maximum string size
increased from 64KB (16-bit size field) to 4GB (32-bit size field).
-- Fix bug that prevented time value of "INFINITE" from being processed.
-- Added new srun/sbatch option "--open-mode" to control how output/error
files are opened ("t" for truncate, "a" for append).
-- Added checkpoint/xlch plugin for use with XLCH (Hongjia Cao, NUDT).
-- Added srun option --checkpoint-path for use with XLCH (Hongjia Cao, NUDT).
-- Added new srun/salloc/sbatch option "--acctg-freq" for user control over
accounting data collection polling interval.
-- In sched/wiki2 add support for hostlist expression use in GETNODES command
with HostFormat=2 in the wiki.conf file.
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