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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.
-- Add support for spank_get_item() to get S_STEP_ALLOC_CORES and
S_STEP_ALLOC_MEM. Support will remain for S_JOB_ALLOC_CORES and
S_JOB_ALLOC_MEM.
-- Kill individual job steps that exceed their memory limit rather than
killing an entire job if one step exceeds its memory limit.
-- Added configuration parameter VSizeFactor to enforce virtual memory limits
for jobs and job steps as a percentage of their real memory allocation.
-- Added SLURM_VERSION_NUMBER and removed SLURM_API_VERSION from
slurm/slurm.h.
Danny Auble
committed
-- Added support to handle communication with SLURM 2.1 clusters. Job's
should not be lost in the future when upgrading to higher versions of
SLURM.
-- Added withdeleted options for listing clusters, users, and accounts
-- Remove PLPA task affinity functions due to that package being deprecated.
-- Preserve current partition state information and node Feature and Weight
information rather than use contents of slurm.conf file after slurmctld
restart with -R option or SIGHUP. Replace information with contents of
slurm.conf after slurmctld restart without -R or "scontrol reconfigure".
See RELEASE_NOTES file fore more details.
-- Modify SLURM's PMI library (for MPICH2) to properly execute an executable
program stand-alone (single MPI task launched without srun).
-- Made GrpCPUs and MaxCPUs limits work for select/cons_res.
Danny Auble
committed
-- Moved all SQL dependant plugins into a seperate rpm slurm-sql. This
should be needed only where a connection to a database is needed (i.e.
where the slurmdbd is running)
-- Add command line option "no_sys_info" to PAM module to supress system
logging of "access granted for user ...", access denied and other errors
will still be logged.
Danny Auble
committed
-- sinfo -R now has the user and timestamp in separate fields from the reason.
-- Much functionality has been added to account_storage/pgsql. The plugin
is still in a very beta state. It is still highly advised to use the
mysql plugin, but if you feel like living on the edge or just really
like postgres over mysql for some reason here you go. (Work done
primarily by Hongjia Cao, NUDT.)
* Changes in SLURM 2.1.3
=============================
-- BLUEGENE - Fix issues on static/overlap systems where if a midplane
was drained you would not be able to create new blocks on it.
-- In sched/wiki2 (for Moab): Add excluded host list to job information
using new keyword "EXCLUDE_HOSTLIST".
-- Correct slurmd reporting of incorrect socket/core/thread counts.
-- For sched/wiki2 (Moab): Do not extend a job's end time for suspend/resume
or startup delay due to node boot time. A job's end time will always be
its start time plus time limit.
-- Added build-time option (to configure program) of --with-pam_dir to
specify the directory into which PAM modules get installed, although it
should pick the proper directory by default. "make install" and "rpmbuild"
should now put the pam_slurm.so file in the proper directory.
* Changes in SLURM 2.1.2
=============================
-- Added nodelist to sview for jobs on non-bluegene systems
-- Correction in value of batch job environment variable SLURM_TASKS_PER_NODE
under some conditions.
-- When a node silently fails which is already drained/down the reason
for draining for the node is not changed.
-- Srun will ignore SLURM_NNODES environment variable and use the count of
currently allocated nodes if that count changes during the job's lifetime
(e.g. job allocation uses the --no-kill option and a node goes DOWN, job
step would previously always fail).
-- Made it so sacctmgr can't add blank user or account. The MySQL plugin
will also reject such requests.
-- Revert libpmi.so version for compatibility with SLURM version 2.0 and
earlier to avoid forcing applications using a specific libpmi.so version to
rebuild unnecessarily (revert from libpmi.so.21.0.0 to libpmi.so.0.0.0).
-- Restore support for a pending job's constraints (required node features)
when slurmctld is restarted (internal structure needed to be rebuilt).
-- Removed checkpoint_blcr.so from the plugin rpm in the slurm.spec since
it is also in the blcr rpm.
-- Fixed issue in sview where you were unable to edit the count
of jobs to share resources.
-- BLUEGENE - Fixed issue where tasks on steps weren't being displayed
correctly with scontrol and sview.
-- BLUEGENE - fixed wiki2 plugin to report correct task count for pending
jobs.
-- BLUEGENE - Added /etc/ld.so.conf.d/slurm.conf to point to the
directory holding libsched_if64.so when building rpms.
-- Adjust get_wckeys call in slurmdbd to allow operators to list wckeys.
* Changes in SLURM 2.1.1
=============================
Danny Auble
committed
-- Fix for case sensitive databases when a slurmctld has a mixed case
clustername to lower case the string to easy compares.
Danny Auble
committed
-- Fix squeue if job is completing and failed to print remaining
nodes instead of failed message.
-- Fix sview core when searching for partitions by state.
Danny Auble
committed
-- Fixed setting the start time when querying in sacct to the
beginning of the day if not set previously.
-- Defined slurm_free_reservation_info_msg and slurm_free_topo_info_msg
in common/slurm_protocol_defs.h
-- Avoid generating error when a job step includes a memory specification and
memory is not configured as a consumable resource.
-- Patch for small memory leak in src/common/plugstack.c
-- Fix bug in which improperly formed job dependency specification can cause
slurmctld to abort.
-- Fixed issue where slurmctld wouldn't always get a message to send cluster
information when registering for the first time with the slurmdbd.
-- Add slurm_*_trigger.3 man pages for event trigger APIs.
-- Fix bug in job preemption logic that would free allocated memory twice.
-- Fix spelling issues (from Gennaro Oliva)
-- Fix issue when changing parents of an account in accounting all childern
weren't always sent to their respected slurmctlds until a restart.
-- Restore support for srun/salloc/sbatch option --hint=nomultithread to
bind tasks to cores rather than threads (broken in slurm v2.1.0-pre5).
-- Fix issue where a 2.0 sacct could not talk correctly to a 2.1 slurmdbd.
-- BLUEGENE - Fix issue where no partitions have any nodes assigned them to
alert user no blocks can be created.
-- BLUEGENE - Fix smap to put BGP images when using -Dc on a Blue Gene/P
system.
-- Set SLURM_SUBMIT_DIR environment variable for srun and salloc commands to
match behavior of sbatch command.
-- Report WorkDir from "scontrol show job" command for jobs launched using
salloc and srun.
-- Update correctly the wckey when changing it on a pending job.
-- Set wckeyid correctly in accounting when cancelling a pending job.
-- BLUEGENE - critical fix where jobs would be killed incorrectly.
-- BLUEGENE - fix for sview putting multiple ionodes on to nodelists when
viewing the jobs tab.
-- Improve sview layout of blocks in use.
-- A user can now change the dimensions of the grid in sview.
-- BLUEGENE - improved startup speed further for large numbers of defined
blocks
-- Fix to _get_job_min_nodes() in wiki2/get_jobs.c suggested by Michal Novotny
-- BLUEGENE - fixed issues when updating a pending job when a node
count was incorrect for the asked for connection type.
Danny Auble
committed
-- BLUEGENE - fixed issue when combining blocks that are in ready states to
make a larger block from those or make multiple smaller blocks by
splitting the larger block. Previously this would only work with block
in a free state.
Danny Auble
committed
-- Fix bug in wiki(2) plugins where if HostFormat=2 and the task list is
greater than 64 we don't truncate. Previously this would mess up Moab
by sending a truncated task list when doing a get jobs.
-- Added update slurmctld debug level to sview when in admin mode.
-- Added logic to make sure if enforcing a memory limit when using the
jobacct_gather plugin a user can no longer turn off the logic to enforce
the limit.
-- Replaced many calls to getpwuid() with reentrant uid_to_string()
Danny Auble
committed
-- The slurmstepd will now refresh it's log file handle on a reconfig,
previously if a log was rolled any output from the stepd was lost.
* Changes in SLURM 2.1.0-pre9
=============================
-- Added the "scontrol update SlurmctldDebug" as the preferred alternative to
the "scontrol setdebug" command.
Danny Auble
committed
-- BLUEGENE - made it so when removing a block in an error state the nodes in
the block are set correctly in accounting as not in error.
Danny Auble
committed
-- Fixed issue where if slurmdbd is not up qos' are set up correctly for
-- scontrol, squeue, sview all display the correct node, cpu count along with
correct corresponding nodelist on completing jobs.
-- Patch (Mark Grondona) fixes serious security vulnerability in SLURM in
the spank_job_env functionality.
-- Improve spank_job_env interface and documentation
-- Add ESPANK_NOT_LOCAL error code to spank_err_t
-- Made the #define DECAY_INTERVAL used in the priority/multifactor plugin
a slurm.conf variable (PriorityCalcPeriod)
Danny Auble
committed
-- Added new macro SLURM_VERSION for use in autoconf scripts to determine
current version of slurm installed on system when building against the api.
-- Patch from Matthieu Hautreux that adds an entry into the error file when
a job or step receives a TERM or KILL signal.
Danny Auble
committed
-- Make it so env var SLURM_SRUN_COMM_HOST is overwritten if already in
* Changes in SLURM 2.1.0-pre8
=============================
-- Rearranged the "scontrol show job" output into functional groupings
-- Change the salloc/sbatch/srun -P option to -d (dependency)
-- Removed the srun -d option; must use srun --slurmd-debug instead
-- When running the mysql plugin natively MUNGE errors are now eliminated
when sending updates to slurmctlds.
-- Check to make sure we have a default account before looking to
fill in default association.
-- Accounting - Slurmctld and slurmdbd will now set uids of users which were
created after the start of the daemons on reconfig. Slurmdbd will
attempt to set previously non-existant uids every hour.
Danny Auble
committed
-- Patch from Aaron Knister and Mark Grondona, to parse correctly quoted
#SBATCH options in a batch script.
-- job_desc_msg_t - in, out, err have been changed to std_in, std_out,
and std_err respectfully. Needed for PySLURM, since Python sees (in)
as a keyword.
-- Changed the type of addr to struct sockaddr_in in _message_socket_accept()
Danny Auble
committed
in sattach.c, step_launch.c, and allocate_msg.c, and moved the function
into a common place for all the calls since the code was very similar.
-- proctrack/lua support has been added see contribs/lua/protrack.lua
-- replaced local gtk m4 test with AM_PATH_GTK_2_0
-- changed AC_CHECK_LIB to AC_SEARCH_LIBS to avoid extra libs in
compile lines.
-- Patch from Matthieu Hautreux to improve error message in slurmd/req.c
-- Added support for split groups from (Matthiu Hautreux CEA)
-- Patch from Mark Grondona to move blcr scripts into pkglibexecdir
-- Patch from Doug Parisek to calculate a job's projected start time under the
builtin scheduler.
-- Removed most global variables out of src/common/jobacct_common.h
* Changes in SLURM 2.1.0-pre7
=============================
Danny Auble
committed
-- BLUEGENE - make 2.1 run correctly on a real bluegene cluster
-- sacctmgr - Display better debug for when an admin specifies a non-existant
Danny Auble
committed
parent account when changing parent accounts.
-- Added a mechanism to the slurmd to defer the epilog from starting until
after a running prolog has finished.
-- If a node reboots inbetween checking status the node is marked down unless
ReturnToService=2
Danny Auble
committed
-- Added -R option to slurmctld to recover partition state also when
restarting or reconfiguring.
* Changes in SLURM 2.1.0-pre6
=============================
-- When getting information about nodes in hidden partitions, return a node
name of NULL rather than returning no information about the node so that
node index information is still valid.
-- When querying database for jobs in certain state and a time period is
Danny Auble
committed
given only jobs in that state during the period will be returned,
previously if a time period was given in sacct jobs eligible to run or
running would be displayed, which is still the default if no states are
requested.
-- One can now query jobs based on size (nodes and or cpus) (mysql plugin only)
Don Lipari
committed
-- Applied patch from Mark Grondona that tests for a missing config file before
any other processing in spank_init(). This now prevents fatal errors from
being mistakenly treated as recoverable.
-- --enable-debug no longer has to be stated at configure time to have
the slurmctld or slurmstepd dump core on a seg fault.
-- Moved the errant slurm_job_node_ready() declaration from job_info.h to
slurm.h and deleted job_info.h.
slurm_job_cpus_allocated_on_node() API for working with the
job_resources_t structure.
Danny Auble
committed
-- BLUEGENE - speed up start up for systems that have many blocks (100+)
configured on the system.
Danny Auble
committed
* Changes in SLURM 2.1.0-pre5
=============================
-- Add squeue option "--start" to report expected start time of pending jobs.
-- Sched/backfill plugin modified to set expected start time of pending jobs.
-- Add SchedulerParameters option of "max_job_bf=#" to control how far down
the queue of pending jobs that SLURM searches in an attempt backfill
schedule them. The default value is 50 jobs.
-- Fixed cause of squeue -o "%C" seg fault.
-- Add -"-signal=<int>@<time>" option to salloc, sbatch and srun commands to
notify programs before reaching the end of their time limit.
-- Add scontrol option to update a running job's EndTime (also resets the
job's time limit).
-- Add new job wait reason, ReqNodeNotAvail: Required node is not available
(down or drained).
-- Log when slurmctld or slurmd are started with small core file limit.
-- Permit job's owner to change features, processor count, minimum and
maximun node counts of pending jobs (the operation was previously
restricted to user root)
-- Applied patch from Chuck Clouston for scontrol man page with clarifications
and additional info
-- Change slurm errno name from ESLURM_TOO_MANY_REQUESTED_NODES to
ESLURM_INVALID_NODE_COUNT to better reflect its meaning.
-- Fix bug in sched/backfill which could result in invalid memory reference
when trying to schedule jobs submitted with --exclude option.
-- Fix for slurmctld deadlock at startup with PreemptMode=SUSPEND,GANG.
-- Completely disable logging of sched/wiki and sched/wiki2 (Maui & Moab)
message traffic unless DebugFlag=Wiki is configured.
-- Change scontrol show job info: ReqProcs (number of processors requested)
is replaced by NumProcs (number of processors requested or actually
allocated) and ReqNodes (number of nodes requested) is replaced by
NumNodes (number of nodes requested or actually allocated).
Danny Auble
committed
-- Fixed issue when max nodes wasn't specified and was later set by limit
to not request that as the actual maximum.
-- Move job preemption (for requeue, checkpoint and kill modes only) out of
gang scheduling module. Make identification of preemptable jobs an argument
to the select_g_job_test function rather than calling preempt plugin from
the select plugin. Make output of srun --test-only option include a list
of preempted job IDs.
-- Better record keeping for front end systems when registering.
-- Enable memory allocation logic for jobs step (i.e. allocate resources
within the job's memory allocation and enforce limits).
-- sview and "scontrol show config" now report as SLURM_VERSION the version
of slurmctld rather than that of the command.
-- Change SuspendTime configuration parameter from 16-bits to 32-bits.
-- Add environment variable support to sattach, salloc, sbatch and srun
to permit user control over exit codes so application exit codes can be
distiguished from those generated by SLURM. SLURM_EXIT_ERROR specifies the
exit code when a SLURM error occurs. SLURM_EXIT_IMMEDIATE specifies the
exit code when the --immediate option is specified and resources are not
available. Any other non-zero exit code would be that of the application
run by SLURM.
-- Added a Quality of Service (QOS) html page.
-- In sched/wiki2, JOBWILLRUN command, add support for identification of
preemptable and preempted jobs (both new and old format of commands are
supported).
-- Remove contribs/python/hostlist files. Download the materials as needed
directly from http://www.nsc.liu.se/~kent/python-hostlist.
-- BLUEGENE - Preemption now works on bluegene systems
-- For salloc, sbatch and srun commands, ignore _maximum_ values for
--sockets-per-node, --cores-per-socket and --threads-per-core options.
Remove --mincores, --minsockets, --minthreads options (map them to
minimum values of -sockets-per-node, --cores-per-socket and
--threads-per-core for now).
Danny Auble
committed
Moe Jette
committed
* Changes in SLURM 2.1.0-pre4
=============================
-- Move processing of node configuration information in slurm.conf and
topology information in topology.conf from slurmctld into common and load
that information into slurmd. Use it to set environment variables for jobs
SLURM_TOPOLOGY_ADDR and SLURM_TOPOLOGY_ADDR_PATTERN describing the network
topology for each task. Based upon patch from Mattheu Hautreux (CEA).
-- Correction in computing a job's TotalProcs value when ThreadsPerCore>1 and
allocating by cores or sockets.
Moe Jette
committed
* Changes in SLURM 2.1.0-pre3
=============================
-- Removed sched/gang plugin and moved the logic directly into the slurmctld
daemon so that job preemption and gang scheduling can be used with the
sched/backfill plugin. Added configuration parameter:
PreemptMode=gang|off|suspend|cancel|requeue|checkpoint
to enable/disable gang scheduling and job preemption logic (both are
disabled by default).
(NOTE: There are some problems with memory management which could prevent a
job from starting when memory would be freed by a job being requeued or
otherwise removed, these are being worked on)
-- Added PreemptType configuration parameter to identify preemptable jobs.
Former users of SchedType=sched/gang should set SchedType=sched/backfill,
PreemptType=preempt/partition_prio and PreemptMode=gang,suspend. See
web and slurm.conf man page for other options.
Moe Jette
committed
PreemptType=preempt/qos uses Quality Of Service information in database.
-- In select/linear, optimize job placement across partitions.
-- If the --partition option is used with the sinfo or squeue command then
print information about even hidden partitions.
-- Replaced misc cpu allocation members in job_info_t with select_job_res_t
which will only be populated when requested (show_flags & SHOW_DETAIL)
-- Added a --detail option to "scontrol show job" to display the cpu/mem
allocation info on a node-by-node basis.
Danny Auble
committed
-- Added logic to give correct request uid for individual steps that
were cancelled.
-- Created a spank_get_item() option (S_JOB_ALLOC_MEM) that conveys the memory
that the select/cons_res plugin has allocated to a job.
-- BLUEGENE - blocks in error state are now handled correctly in accounting.
-- Modify squeue to print job step information about a specific job ID using
the following syntax: "squeue -j <job_id> -s".
-- BLUEGENE - scontrol delete block and update block can now remove blocks
on dynamic laid out systems.
-- BLUEGENE - Vastly improve Dynamic layout mode algorithm.
-- Address some issues for SLURM support of Solaris.
Danny Auble
committed
-- Applied patch from Doug Parisek (Doug.Parisek@bull.com) for speeding up
start of sview by delaying to creation of tooltips until requested.
-- Changed GtkToolTips to GtkToolTip for newer versions of GTK.
-- Applied patch from Rod Schultz (Rod.Schultz@Bull.com) that eliminates
ambiguity in the documentation over use of the terms "CPU" and "socket".
-- Modified get_resource_arg_range() to return full min/max values when input
string is null. This fixes the srun -B option to function as documented.
-- If the job, node, partition, reservation or trigger state file is missing
or too small, automatically try using the previously saved state (file
name with ".old" suffix).
-- Set a node's power_up/configuring state flag while PrologSlurmctld is
running for a job allocated to that node.
-- If PrologSlurmctld has a non-zero exit code, requeue the job or kill it.
-- Added sacct ability to use --format NAME%LENGTH similar to sacctmgr.
-- Improve hostlist logic for multidimensional systems.
-- The pam_slurm Pluggable Authentication Module for SLURM previously
distributed separately has been moved within the main SLURM distribution
and is packaged as a separate RPM.
-- Added configuration parameter MaxTasksPerNode.
-- Remove configuration parameter SrunIOTimeout.
-- Added functionality for sacctmgr show problems. Current problems include
Accounts/Users with no associations, Accounts with no users or subaccounts
attached in a cluster, and Users with No UID on the system.
-- Added new option for sacctmgr list assoc and list cluster WOLimits. This
gives a smaller default format without the limit information. This may
be the new default for list assocations and list clusters.
-- Users are now required to have an association with there default account.
Sacctmgr will now complain when you try to modify a users default account
which they are not associated anywhere.
-- Fix select/linear bug resulting in run_job_cnt underflow message if a
suspended job is cancelled.
-- Add test for fsync() error for state save files. Log and retry as needed.
-- Log fatal errors from slurmd and slurmctld to syslog.
-- Added error detection and cleanup for the case in which a compute node is
rebooted and restarts its slurmd before its "down" state is noticed.
-- BLUEGENE systems only - remove vestigal start location from jobinfo.
-- Add reservation flag of "OVERLAP" to permit a new reservation to use
nodes already in another reservation.
-- Fix so "scontrol update jobid=# nice=0" can clear previous nice value.
-- BLUEGENE - env vars such as SLURM_NNODES, SLURM_JOB_NUM_NODES, and
SLURM_JOB_CPUS_PER_NODE now reference cnode counts instead of midplane
counts. SLURM_NODELIST still references midplane names.
-- Added qos support to salloc/sbatch/srun/squeue
-- Added to scancel the ability to select jobs by account and qos
-- Recycled the "-A" argument indicate "account" for all the commands that
accept the --account argument (srun -A to allocate is no longer supported.)
-- Change sbatch response from "sbatch: Submitted batch job #" written to
stderr to "Submitted batch job #" written to stdout.
-- Made shutdown and cleanup a little safer for the mvapich and mpich1_p4
plugins.
-- QOS support added with limits, priority and preemption
(no documentation yet).
-- If a slurmd does not have a node listed in it's slurm.conf (slurm.conf's
should be kept the same on all nodes) an error message is printed in the
slurmctld log along with the message already being printed in the slurmd
log for easier debugging.
* Changes in SLURM 2.1.0-pre2
=============================
-- Added support for smap to query off node name for display.
-- Slurmdbd modified to set user ID and group ID to SlurmUser if started as
user root.
-- Configuration parameter ControlMachine changed to accept multiple comma-
separated hostnames for support of some high-availability architectures.
Danny Auble
committed
-- ALTERED API CALL slurm_get_job_steps 0 has been changed to NO_VAL for both
job and step id to recieve all jobs/steps. Please make adjustments to
your code.
-- salloc's --wait=<secs> option deprecated by --immediate=<secs> option to
match the srun command.
-- Add new slurmctld list for node features with node bitmaps for simplified
scheduling logic.
Moe Jette
committed
-- Multiple features can be specified when creating a reservation. Use "&"
(AND) or "|" (OR) separators between the feature names.
-- Changed internal node name caching so that front-end mode would work with
multiple lines of node name definitions.
-- Add node state flag for power-up/configuring. Represented by "#" suffix
on the node state name (e.g. "ALLOCATED#") for command output.
-- Add CONFIGURING/CF job state flag for node power-up/configuring.
-- Modify job step cancel logic for scancel and srun (on reciept of SIGTERM
or three SIGINT) to immediately send SIGKILL to spawned tasks. Previous
logic would send SIGCONT, SIGTERM, wait KillWait seconds, SIGKILL.
-- Created a spank_get_item() option (S_JOB_ALLOC_CORES) that conveys the cpus
that the select/cons_res plugin has allocated to a job.
-- Improve sview performance (outrageously) on very large machines.
-- Add support for licenses in resource reservation.
-- BLUEGENE - Jobs waiting for a block to boot will now be in Configuring
state.
-- bit_fmt now does not return brackets surrounding any set of data.
* Changes in SLURM 2.1.0-pre1
=============================
-- Slurmd notifies slurmctld of node boot time to better clean up after node
reboots.
-- Slurmd sends node registration information repeatedly until successful
transmit.
-- Change job_state in job structure to dedicate 8-bits to state flags.
Added macros to get state information (IS_JOB_RUNNING(job_ptr), etc.)
-- Added macros to get node state information (IS_NODE_DOWN(node_ptr), etc).
-- Added support for Solaris. Patch from David Hoppner.
-- Rename "slurm-aix-federation-<version>.rpm" to just
"slurm-aix-<version>.rpm" (federation switch plugin may not be present).
Moe Jette
committed
-- Eliminated the redundant squeue output format and sort options of
"%o" and "%b". Use "%D" and "%S" formats respectively. Also eliminated
Moe Jette
committed
"%X" and "%Y" and "%Z" formats. Use "%z" instead.
-- Added mechanism for SPANK plugins to set environment variables for
Prolog, Epilog, PrologSLurmctld and EpilogSlurmctld programs using
the functions spank_get_job_env, spank_set_job_env, and
spank_unset_job_env. See "man spank" for more information.
-- Completed the work to begun in 2.0.0 to standardize on using '-Q' as the
--quiet flag for all the commands.
Danny Auble
committed
-- BLUEGENE - sinfo and sview now display correct cpu counts for partitions
-- Cleaned up the cons_res plugin. It now uses a ptr to a part_record
instead of having to do strcmp's to find the correct one.
-- Pushed most all the plugin specific info in src/common/node_select.c
into the respected plugin.
-- BLUEGENE - closed some corner cases where a block could had been removed
while a job was waiting for it to become ready because an underlying
part of the block was put into an error state.
-- Modify sbcast logic to prevent a user from moving files to nodes they
have not been allocated (this would be possible in previous versions
only by hacking the sbcast code).
-- Add contribs/sjstat script (Perl tool to report job state information).
Put into new RPM: sjstat.
-- Add sched/wiki2 (Moab) JOBMODIFY command support for VARIABLELIST option
to set supplemental environment variables for pending batch jobs.
-- BLUEGENE - add support for scontrol show blocks.
-- Added support for job step time limits.
* Changes in SLURM 2.0.10
=========================
* Changes in SLURM 2.0.9
========================
-- When running the mysql plugin natively MUNGE errors are now eliminated
when sending updates to slurmctlds.
-- Check to make sure we have a default account before looking to
fill in default association.
-- Fix to make it so sched/wiki2 can modify a job's partition or hostlist of
non-pending jobs.
-- Applied slurmctld prolog bug fix from Dennis Leepow to backfill.c
-- fixed quite a few typos (needed for debian packages)
-- make it so slurmctld will core dump without --enable-debug set
-- Fix issue when doing a rollup on reservations before a cluster has been
added.
-- MySQL plugin - When doing archiving end time is now decreased by 1
which should be more correct.
-- BLUEGENE - Fixed issue where --no-rotate didn't work correctly on job
submissions.
-- BLUEGENE - made the buffer longer when submitting jobs to get the entire
line. Previously the line could be shortened prematurely.
-- BLUEGENE - Fix to make sure we don't erroneously set a connection type
to SMALL.
-- Type cast a negative uint64_t to int64_t to avoid confusion when doing
arithmetic with it in accounting dealing with over commit time.
* Changes in SLURM 2.0.8
========================
-- BLUEGENE - added dub2 of stderr to put error messages sent from underlying
libraries of the bridge api to the bridgeapi.log
-- Fixed issue with sacctmgr when modifing a user and specifying 'where'
after giving the user name also.
-- -L, --allclusters now works with sacct
-- Modified job table to use 32bit u/gids for those with ids greater
than 16 bits.
-- Made minor changes for slurm to compile cleanly under gcc 4.4.1
-- Fixed issue with task/affinity when an allocation would run multiple sruns
with the --exclusive flag in an allocation with more than 1 node.
Previously when the first node was filled up no tasks would ever run
on the other nodes.
-- Fixed sview and sacct to display correct run time and suspend time when
job has been suspended.
-- Applied patch from Mark Grondona that fixes the validation of the
PluginDir to support the colon separated list of directories as documented.
-- BLUEGENE - squeue -o %R now prints more readable info for small blocks
-- sacct - fixed garbage being printed out on uninitialized variable.
-- Fix for mysql plugin when used without slurmdbd to register the
slurmctld properly.
-- Fix for mysql plugin putting correct hostnames in for running steps.
* Changes in SLURM 2.0.7
========================
-- Fix bug in select/cons_res when nodes are configured in more than one
partition and those partitions have different priorities and sched/gang
is not configured. CPUs were previously over-allocated.
-- Fix core of smap when specifying -i option with invalid argument.
-- Fix issue when using srun --test-only to not put an entry of test
job into accounting.
-- For OpenMPI use of SLURM reserved ports. If any of the tasks fails to
acquire a reserved port and has an exit code of 108 then srun will
kill all remaining tasks and respawn the tasks. Previous code waited
for tasks to exit.
-- MySQL plugin - When doing archiving we now get a correct end time.
Previously it would grab an extra day to archive.
-- BLUEGENE - Handle initial state correctly, previously was setting initial
state to IDLE if UNKNOWN which would make it not set a registration
message to accounting, which could lead to nodes not being listed as up
when they really were.
-- Fixed buffer size issue with scontrol show hostlist.
-- Fixed issue with copy in smap -Dc previously command wouldn't work.
-- BLUEGENE - Update documentation about small blocks in the bluegene.conf
file.
-- In sched/wiki plugin (for Maui) fix possible message truncation on very
large cluster.
-- BLUEGENE - Fix for handling undocumented Deallocating to Configuring to
Free block transition state.
-- BLUEGENE - Fix for overlap mode loading blocks when midplane is in an
error state.
-- Add range check for SuspendTime configuration parameter.
-- Moved unzipped python-hostname tarball out and the tarball in.
-- BLUEGENE - Patched memory leak when running state test.
-- BLUEGENE - fixed slow down generated by slow call rm_get_BG
and polling thread.
* Changes in SLURM 2.0.6
========================
-- Fixed seg fault when "scontrol listpids" is invoked for a specific job step
on a node on which a stepd is not running.
-- Fix bug in sched/backfill which could result in invalid memory reference
when trying to schedule jobs submitted with --exclude option.
* Changes in SLURM 2.0.5
========================
-- BLUEGENE - Added support for emulating systems with a X-dimension of 4.
-- BLUEGENE - When a nodecard goes down on a non-Dynamic system SLURM will
now only drain blocks under 1 midplane, if no such block exists then SLURM
will drain the entire midplane and not mark any block in error state.
Previously SLURM would drain every overlapping block of the nodecard
making it possible for a large block to make other blocks not work since
they overlap some other part of the block that really isn't bad.
-- BLUEGENE - Handle L3 errors on boot better.
-- Don't revoke a pending batch launch request from the slurmctld if the
job is immediately suspended (a normal event with gang scheduling).
-- BLUEGENE - Fixed issue with restart of slurmctld would allow error block
nodes to be considered for building new blocks when testing if a job would
run. This is a visual bug only, jobs would never run on new block, but
the block would appear in slurm tools.
-- Better responsiveness when starting new allocations when running with the
slurmdbd.
-- Fixed race condition when reconfiguring the slurmctld and using the
consumable resources plugin which would cause the controller to core.
David J. Bremer
committed
-- Fixed race condition that sometimes caused jobs to stay in completing
state longer than necessary after being terminated.
-- Fixed issue where if a parent account has a qos added and then a child
account has the qos removed the users still get the qos.
-- BLUEGENE - New blocks in dynamic mode will only be made in the system
when the block is actually needed for a job, not when testing.
-- BLUEGENE - Don't remove larger block used for small block until job starts.
-- Add new squeue output format and sort option of "%L" to print a job's time
left (time limit minus time used).
-- BLUEGENE - Fixed draining state count for sinfo/sview.
-- Fix for sview to not core when viewing nodes allocated to a partition
and the all jobs finish.
-- Fix cons_res to not core dump when finishing a job running on a
defunct partition.
-- Don't require a node to have --ntasks-per-node CPUs for use when the
--overcommit option is also used.
-- Increase the maximum number of tasks which can be launched by a job step
per node from 64 to 128.
-- sview - make right click on popup window title show sorted list.
-- scontrol now displays correct units for job min memory and min tmp disk.
-- better support for salloc/sbatch arbitrary layout for setting correct
SLURM_TASKS_PER_NODE
-- Env var SLURM_CPUS_ON_NODE is now set correctly depending on the
FastSchedule configuration parameter.
-- Correction to topology/3d_torus plugin calculation when coordinate value
exceeds "9" (i.e. a hex value).
-- In sched/wiki2 - Strip single and double quotes out of a node's reason
string to avoid confusing Moab's parser.
-- Modified scancel to cancel any pending jobs before cancelling any other
-- Updated sview config info
-- Fix a couple of bugs with respect to scheduling with overlapping
reservations (one with a flag of "Maintenance").
-- Fix bug when updating a pending job's nice value after explicitly setting
it's priority.
-- We no longer add blank QOS'
-- Fix task affinity for systems running fastschedule!=0 and they have less
resources configured than in existence.
-- Slurm.pm loads without warning now on AIX systems
-- modified pmi code to do strncpy's on the correct len
-- Fix for filling in a qos structure to return SLURM_SUCCESS on success.
-- BLUEGENE - Added SLURM_BG_NUM_NODES with cnode count of allocation,
SLURM_JOB_NUM_NODES represents midplane counts until 2.1.
-- BLUEGENE - Added fix for if a block is in error state and the midplane
containing the block is also set to drain/down. This previously
prevented dynamic creation of new blocks when this state was present.
-- Fixed bug where a users association limits were not enforced, only
parent limits were being enforced.
-- For OpenMPI use of SLURM reserved ports, reserve a count of ports equal to
the maximum task count on any node plus one (the plus one is a correction).
-- Do not reset SLURM_TASKS_PER_NODE when srun --preserve-env option is used
(needed by OpenMPI).
-- Fix possible assert failure in task/affinity if a node is configured with
more resources than physically exist.
-- Sview can now resize columns.
-- Avoid clearing a drained node's reason field when state is changed from
down (i.e. returned to service). Note the drain state flag stays set.
* Changes in SLURM 2.0.4
========================
-- Permit node suspend/resume logic to be enabled through "scontrol reconfig"
given appropriate changes to slurm configuration file.
-- Check for return codes on functions with warn_unused_result set.
-- Fix memory leak in getting step information (as used by squeue -s).
-- Better logging for when job's request bad output file locations.
-- Fix issue where if user specified non-existant file to write to slurmstepd
will regain privileges before sending batch script ended to the controller.
-- Fix bug when using the priority_multifactor plugin with no associations
yet.
-- BLUEGENE - we no longer check for the images to sync state. This was
needed long ago when rebooting blocks wasn't a possibility and should
had been removed when that functionality was available.
-- Added message about no connection with the database for sacctmgr.
-- On BlueGene, let srun or salloc exit on SIGINT if slurmctld dies while
booting its block.
-- In select/cons_res fix bug that could result in invalid memory pointer
if node configurations in slurm.conf contains 8 or more distinct
socket/core/thread counts.
-- Modify select/cons_res to recognize updated memory size upon node startup
if FastSchedule=0.
-- Fixed bug if not enforcing associations, but running with them and the
priority/multifactor, the slurmctld will not core dump on processing usage.
-- QOS will not be reset to the default when added back a previously deleted
association.
-- Do not set a job's virtual memory limit based upon the job's specified
memory limit (which should be a real memory limit, not virtual).
-- BLUEGENE - fix for sinfo/sview for displaying proper node count for nodes
in draining state.
-- Fix for sview when viewing a certain part of a group (like 1 job) so it
doesn't core when the part is gone.
-- BLUEGENE - Changed order of SYNC's to be on the front of the list to
avoid having a job terminated with a TERM before the SYNC of the
job happens.
-- Validate configured PluginDir value is a valid directory before trying to
use it.
-- Fix to resolve agent_queue_request symbol from some checkpoint plugins.
-- Fix possible execve error for sbatch script read from stdin.
-- Modify handling of user ID/name and group ID/name in the slurm.conf file
to properly handle user names that contain all digits. Return error code
from uid_from_string() and gid_from_string() functions rather than a uid of
-1, which might be a valid uid or gid on some systems.
-- Fix in re-calcuation of job priorities due to DOWN or DRAINED nodes.
* Changes in SLURM 2.0.3
========================
-- Add reservation creation/update flag of Ignore_Jobs to enable the creation
of a reservation that overlaps jobs expected to still be running when
the reservation starts. This would be especially useful to reserve all
nodes for system maintenence without adjusting time limits of running
jobs before creating the reservation. Without this flag, nodes allocated
jobs expected to running when the reservation begins can not be placed
into a reservation.
-- In task/affinity plugin, add layer of abstraction to logic translating
block masks to physical machine masks. Patch from Matthieu Hautreux, CEA.
-- Fix for setting the node_bitmap in a job to NULL if the job does not
start correctly when expected to start.
-- Fixed bug in srun --pty logic. Output from the task was split up
arbitrarily into stdout and stderr streams, and sometimes was printed
out of order.
-- If job requests minimum and maximum node count range with select/cons_res,
try to satisfy the higher value (formerly only allocated the minimum).
-- Fix for checking for a non-existant job when querying steps.
-- For job steps with the --exclusive option, base initial wait time in
partly upon the process ID for better performance with many job steps
started at the same time. Maintain exponential back-off as needed.
-- Fix for correct step ordering in sview.
-- Support optional argument to srun and salloc --immediate option. Specify
timeout value in seconds for job or step to be allocated resources.
* Changes in SLURM 2.0.2
========================
-- Fix, don't remove job details when a job is cancelled while pending.
-- Do correct type for mktime so garbage isn't returned on 64bit systems
for accounting archival.
-- Better checking in sacctmgr to avoid infinite loops.
-- Fix minor memory leak in fake_slurm_step_layout_create()
-- Fix node weight (scheduling priority) calculation for powered down
nodes. Patch from Hongjia Cao, NUDT.
-- Fix node suspend/resume rate calculations. Patch from Hongjia Cao, NUDT.
-- Change calculations using ResumeRate and SuspendRate to provide higher
resolution.
-- Log the IP address for incoming messages having an invalid protocol
version number.
-- Fix for sacct to show jobs that start the same second as the sacct
command is issued.
-- BLUEGENE - Fix for -n option to work on correct cpu counts for each
midplane instead of treating -n as a c-node count.
-- salloc now sets SLURM_NTASKS_PER_NODE if --ntasks-per-node option is set.
-- Fix select/linear to properly set a job's count of allocated processors
(all processors on the allocated nodes).
-- Fix select/cons_res to allocate proper CPU count when --ntasks-per-node
option is used without a task count in the job request.
-- Insure that no node is allocated to a job for which the CPU count is less
than --ntasks-per-node * --cpus-per-task.
-- Correct AllocProcs reported by "scontrol show node" when ThreadsPerCore
is greater than 1 and select/cons_res is used.
-- Fix scontrol show config for accounting information when values are
not set in the slurm.conf.
-- Added a set of SBATCH_CPU_BIND* and SBATCH_MEM_BIND* env variables to keep
jobsteps launched from within a batch script from inheriting the CPU and
memory affinity that was applied to the batch script. Patch from Matthieu
Hautreux, CEA.
-- Ignore the extra processors on a node above configured size if either
sched/gang or select/cons_res is configured.
-- Fix bug in tracking memory allocated on a node for select/cons_res plugin.
-- Fixed a race condition when writing labelled output with a file per task
or per node, which potentially closed a file before all data was written.
-- BLUEGENE - Fix, for if a job comes in spanning both less than and
over 1 midplane in size we check the connection type appropriately.
-- Make sched/backfill properly schedule jobs with constraints having node
counts. NOTE: Backfill of jobs with constraings having exclusive OR
operators are not fully supported.
-- If srun is cancelled by SIGINT, set the job state to cancelled, not
failed.
-- BLUEGENE - Fix, for if you are setting an subbp into an error mode
where the subbp stated isn't the first ionode in a nodecard.
-- Fix for backfill to not core when checking shared nodes.
-- Fix for scontrol to not core when hitting just return in interactive mode.
-- Improve sched/backfill logic with respect to shared nodes (multiple jobs
per node).
-- In sched/wiki (Maui interface) add job info fields QOS, RCLASS, DMEM and
TASKSPERNODE. Patch from Bjorn-Helge Mevik, University of Oslo.
* Changes in SLURM 2.0.1
========================
-- Fix, truncate time of start and end for job steps in sacct.
-- Initialize all messages to slurmdbd. Previously uninitialized string could
cause slurmctld to fail with invalid memory reference.
-- BLUEGENE - Fix, for when trying to finish a torus on a block already
visited. Even though this may be possible electrically this isn't valid
in the under lying infrastructure.
-- Fix, in mysql plugins change mediumints to int to support full 32bit
numbers.
-- Add sinfo node state filtering support for NO_RESPOND, POWER_SAVE, FAIL,
MAINT, DRAINED and DRAINING states. The state filter of DRAIN still maps
to any node in either DRAINED or DRAINING state.
-- Fix reservation logic when job requests specific nodes that are already
in some reservation the job can not use.
-- Fix recomputation of a job's end time when allocated nodes which are
being powered up. The end time would be set in the past if the job's
time limit was INFINITE, resulting in it being prematurely terminated.
-- Permit regular user to change the time limit of his pending jobs up to
the partition's limit.
-- Fix "-Q" (quiet) option for salloc and sbatch which was previously
ignored.
-- BLUEGENE - fix for finding odd shaped blocks in dynamic mode.
-- Fix logic supporting SuspendRate and ResumeRate configuration parameters.
Previous logic was changing state of one too many nodes per minute.
-- Save new reservation state file on shutdown (even if no changes).
-- Fix, when partitions are deleted the sched and select plugins are notified.
-- Fix for slurmdbd to create wckeyid's when they don't exist
-- Fix linking problem that prevented checkpoint/aix from working.
========================
Danny Auble
committed
-- Fix for bluegene systems to be able to create 32 node blocks with only
16 psets defined in dynamic layout mode.
-- Improve srun_cr handling of child srun forking. Patch from Hongjia Cao,
NUDT.
-- Configuration parameter ResumeDelay replaced by SuspendTimeout and
ResumeTimeout.
-- BLUEGENE - sview/sinfo now displays correct cnode numbers for drained nodes
or blocks in error state.
-- Fix some batch job launch bugs when powering up suspended nodes.
-- Added option '-T' for sacct to truncate time of start and end and set
default of --starttime to Midnight of current day.
* Changes in SLURM 2.0.0-rc2
============================
Danny Auble
committed
-- Change fanout logic to start on calling node instead of first node in
message nodelist.
-- Fix bug so that smap builds properly on Sun Constellation system.
-- Filter white-space out from node feature specification.
-- Fixed issue with duration not being honored when updating start time in
reservations.
-- Fix bug in sched/wiki and sched/wiki2 plugins for reporting job resource
allocation properly when node names are configured out of sort order
with more than one numeric suffix (e.g. "tux10-1" is configured after
"tux5-1").
-- Avoid re-use of job_id (if specified at submit time) when the existing
job is in completing state (possible race condition with Moab).
-- Added SLURM_DISTRIBUTION to env for salloc.
-- Add support for "scontrol takeover" command for backup controller to
assume control immediately. Patch from Matthieu Hautreux, CEA.
-- If srun is unable to communicate with the slurmd tasks are now marked as
failed with the controller.
Danny Auble
committed
-- Fixed issues with requeued jobs not being accounted for correctly in
the accounting.
-- Clear node's POWER_SAVE flag if configuration changes to one lacking a
ResumeProgram.
-- Extend a job's time limit as appropriate due to delays powering up nodes.
-- If sbatch is used to launch a job step within an existing allocation (as
used by LSF) and the required node is powered down, print the message
"Job step creation temporarily disabled, retrying", sleep, and retry.
-- Configuration parameter ResumeDelay added to control how much time must
after a node has been suspended before resume it (e.g. powering it back
up).
-- Fix CPU binding for batch program. Patch from Matthieu Hautreux, CEA.
-- Fix for front end systems non-responding nodes now show up correctly in
sinfo.
-- Fix bug in preservation of advanced reservations when slurmctld restarts.
-- Updated perlapi to match correctly with slurm.h structures
-- Do not install the srun command on BlueGene systems (mpirun must be used to
launch tasks).
-- Corrections to scheduling logic for topology/tree in configurations where
nodes are configured in multiple leaf switches.
-- Patch from Matthieu Hautreux for backup mysql deamon support.
-- Changed DbdBackup to DbdBackupHost for slurmdbd.conf file
-- Add support for spank_strerror() function and improve error handling in
general for SPANK plugins.
-- Added configuration parameter SrunIOTimeout to optionally ping srun's tasks
for better fault tolerance (e.g. killed and restarteed SLURM daemons on
compute node).
-- Add slurmctld and slurmd binding to appropriate communications address
based upon NodeAddr, ControllerAddr and BackupAddr configuration
parameters. Based upon patch from Matthieu Hautreux, CEA.
NOTE: Fails when SlurmDBD is configured with some configurations.
NOTE: You must define BIND_SPECIFIC_ADDR to enable this option.
-- Avoid using powered down nodes when scheduling work if possible.
Fix possible invalid memory reference in power save logic.
* Changes in SLURM 1.4.0-pre13
==============================
-- Added new partition option AllocNodes which controls the hosts from
which jobs can be submitted to this partition. From Matthieu Hautreux, CEA.
-- Better support the --contiguous option for job allocations.
-- Add new scontrol option: show topology (reports contents of topology.conf
file via RPC if topology/tree plugin is configured).
-- Add advanced reservation display to smap command.
-- Replaced remaining references to SLURM_JOBID with SLURM_JOB_ID - except
when needed for backwards compatibility.
-- Fix logic to properly excise a DOWN node from the allocation of a job
with the --no-kill option.
-- The MySQL and PgSQL plugins for accounting storage and job completion are
now only built if the underlying database libraries exists (previously
the plugins were built to produce a fatal error when used).
-- BLUEGENE - scontrol show config will now display bluegene.conf information.
Danny Auble
committed
* Changes in SLURM 1.4.0-pre12
==============================
-- Added support for hard time limit by associations with added configuration
option PriorityUsageResetPeriod. This specifies the interval at which to
clear the record of time used. This is currently only available with the
priority/multifactor plugin.
-- Added SLURM_SUBMIT_DIR to sbatch's output environment variables.
-- Backup slurmdbd support implemented.
-- Update to checkpoint/xlch logic from Hongjia Cao, NUDT.
-- Added configuration parameter AccountingStorageBackupHost.
Danny Auble
committed
* Changes in SLURM 1.4.0-pre10
==============================
-- Critical bug fix in task/affinity when the CoresPerSocket is greater
than the ThreadsPerCore (invalid memory reference).
-- Add DebugFlag parameter of "Wiki" to log sched/wiki and wiki2
communications in greater detail.
-- Add "-d <slurmstepd_path>" as an option to the slurmd daemon to
specifying a non-stardard slurmstepd file, used for testing purposes.
-- Minor cleanup to crypto/munge plugin.
- Restrict uid allowed to decode job credentials in crypto/munge
- Get slurm user id early in crypto/munge
- Remove buggy error code handling in crypto/munge
-- Added sprio command - works only with the priority/multifactor plugin
-- Add real topology plugin infrastructure (it was initially added
directly into slurmctld code). To specify topology information,
set TopologyType=topology/tree and add configuration information
to a new file called topology.conf. See "man topology.conf" or
topology.html web page for details.
-- Set "/proc/self/oom_adj" for slurmd and slurmstepd daemons based upon
the values of SLURMD_OOM_ADJ and SLURMSTEPD_OOM_ADJ environment
variables. This can be used to prevent daemons being killed when
a node's memory is exhausted. Based upon patch by Hongjia Cao, NUDT.
-- Fix several bugs in task/affinity: cpuset logic was broken and
--cpus-per-task option not properly handled.
-- Ensure slurmctld adopts SlurmUser GID as well as UID on startup.
* Changes in SLURM 1.4.0-pre9
=============================
-- OpenMPI users only: Add srun logic to automatically recreate and
re-launch a job step if the step fails with a reserved port conflict.
-- Added TopologyPlugin configuration parameter.
-- Added switch topology data structure to slurmctld (for use by select
plugin) add load it based upon new slurm.conf parameters: SwitchName,
Nodes, Switches and LinkSpeed.
-- Modify select/linear and select/cons_res plugins to optimize resource
allocation with respect to network topology.
-- Added support for new configuration parameter EpilogSlurmctld (executed
by slurmctld daemon).
-- Added checkpoint/blcr plugin, SLURM now support job checkpoint/restart
using BLCR. Patch from Hongjia Cao, NUDT, China.
-- Made a variety of new environment variables available to PrologSlurmctld
and EpilogSlurmctld. See the "Prolog and Epilog Scripts" section of the
slurm.conf man page for details.
-- NOTE: Cold-start (without preserving state) required for upgrade from
version 1.4.0-pre8.
* Changes in SLURM 1.4.0-pre8
=============================
-- In order to create a new partition using the scontrol command, use
the "create" option rather than "update" (which will only operate
upon partitions that already exist).
-- Added environment variable SLURM_RESTART_COUNT to batch jobs to
indicated the count of job restarts made.
-- Added sacctmgr command "show config".
-- Added the scancel option --nodelist to cancel any jobs running on a
given list of nodes.
-- Add partition-specific DefaultTime (default time limit for jobs,
if not specified use MaxTime for the partition. Patch from Par
Andersson, National Supercomputer Centre, Sweden.
-- Add support for the scontrol command to be able change the Weight
associated with nodes. Patch from Krishnakumar Ravi[KK] (HP).
-- Add DebugFlag configuration option of "CPU_Bind" for detailed CPU
binding information to be logged.
-- Fix some significant bugs in task binding logic (possible infinite loops
and memory corruption).
-- Add new node state flag of NODE_STATE_MAINT indicating the node is in
a reservation of type MAINT.
-- Modified task/affinity plugin to automatically bind tasks to sockets,
cores, or threads as appropriated based upon resource allocation and
task count. User can override with srun's --cpu_bind option.
-- Fix bug in backfill logic for select/cons_res plugin, resulted in
error "cons_res:_rm_job_from_res: node_state mis-count".
-- Add logic go bind a batch job to the resources allocated to that job.
-- Add configuration parameter MpiParams for (future) OpenMPI port
management. Add resv_port_cnt and resv_ports fields to the job step
data structures. Add environment variable SLURM_STEP_RESV_PORTS to
show what ports are reserved for a job step.
-- Add support for SchedulerParameters=interval=<sec> to control the time
interval between executions of the backfill scheduler logic.
-- Preserve record of last job ID in use even when doing a cold-start unless
there is no job state file or there is a change in its format (which only
happens when there is a change in SLURM's major or minor version number:
v1.3 -> v1.4).
-- Added new configuration parameter KillOnBadExit to kill a job step as soon
as any task of a job step exits with a non-zero exit code. Patch based
on work from Eric Lin, Bull.
-- Add spank plugin calls for use by salloc and sbatch command, see
"man spank" for details.
-- NOTE: Cold-start (without preserving state) required for upgrade from