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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 administrators.
* Changes in Slurm 18.08.0pre2
==============================
-- Remove support for "ChosLoc" configuration parameter.
-- Configuration parameters "ControlMachine", "ControlAddr", "BackupController"
and "BackupAddr" replaced by an ordered list of "SlurmctldHost" records
with the optional address appended to the name enclosed in parenthesis.
For example: "SlurmctldHost=head(12.34.56.78)". An arbitrary number of
backup servers can be configured.
-- When a pending job's state includes "UnavailableNodes" do not include the
nodes in FUTURE state.
-- Remove --immediate option from sbatch.
-- Add infrastructure for per-job and per-step TRES parameters: tres-per-job,
tres-per-node, tres-per-socket, tres-per-task, cpus-per-tres, mem-per-tres,
tres-bind and tres-freq. These new parameters are not currently used, but
have been added to the appropriate RPCs.
-- Add DefCpuPerGpu and DefMemPerGpu to global and per-partition configuration
parameters. Shown in scontrol/sview as "JobDefaults=...".
-- Fix for setting always the correct status on job update in mysql
-- Add ValidateMode configuration parameter to knl_cray.conf for static
MCDRAM/NUMA configurations.
-- Fix security issue in accounting_storage/mysql plugin by always escaping
strings within the slurmdbd. CVE-2018-7033.
* Changes in Slurm 18.08.0pre1
==============================
-- Add new burst buffer state of "teardown-fail" to indicate the burst buffer
teardown operation is failing on specific buffers. This changes the numeric
value of the BB_STATE_COMPLETE type. Any Slurm version 17.02 or 17.11 tool
used to report burst buffer state information will report a state of "66"
rather than "complete" for burst buffers which have been deleted, but still
exist in the slurmctld daemon's tables (a very short-lived situation).
-- Multiple backup slurmctld daemons can be configured:
* Specify "BackupController#=<hostname> and "BackupAddr#=<address>" to
identify up to 9 backup servers.
* Output format of "scontrol ping" and the daemon status at the end of
"scontrol status" is modified to report up status of the primary and all
backup servers.
* "scontrol takeover [#]" command can now identify the SlurmctldHost
index number. Default value is "1" (the first backup configured
SlurmctldHost).
-- Enable jobs with zero node count for creation and/or deletion of persistent
burst buffers.
* The partition default MinNodes configuration parameter is now 0
(previously 1 node).
* Zero size jobs disabled for job arrays and heterogeneous jobs, but
supported for salloc, sbatch and srun commands.
-- Add "scontrol show dwstat" command to display Cray burst buffer status.
-- Add "GetSysStatus" option to burst_buffer.conf file. For burst_buffer/cray
this would indicate the location of the "dwstat" command.
-- Add node and partition configuration options of "CpuBind" to control default
task binding. Modify the scontrol to report and modify these parameters.
-- Add "NumaCpuBind" option to knl.conf file to automatically change a node's
CpuBind parameter based upon changes to a node's NUMA mode.
-- Add sbatch "--batch" option to identify features required on batch node.
For example "sbatch --batch=haswell ...".
-- Add "BatchFeatures" field to output of "scontrol show job".
-- Add support for "--bb" option to sbatch command.
-- Add new SystemComment field to job data structure and database. Currently
used for Burst Buffer error logs.
-- Expand reservation "flags" field from 32 to 64 bits.
-- Add job state flag of "SIGNALING" to avoid race condition with multiple
SIGSTOP/SIGCONT signals for the same job being active at the same time.
-- Properly handle srun --will-run option when there are jobs in COMPLETING
state.
-- Properly report who is signaling a step.
-- Don't combine updated reservation records in sreport's reservation report.
-- node_features plugin - Add suport for XOR & XAND of job constraints (node
feature specifications).
-- Add support for parenthesis in a job's constraint specification to group
like options together. For example
--constraint="[(knl&snc4&flat)*4&haswell*1]" might be used to specify that
four nodes with the features "knl", "snc4" and "flat" plus one node with
the feature "haswell" are required.
-- Improvements to how srun searches for the executible when using cwd.
-- Now programs can be checked before execution if test_exec is set when using
multi-prog option.
-- Report NodeFeatures plugin configuration with scontrol and sview commands.
-- Add acct_gather_profile/influxdb plugin.
-- Add new job state of SO/STAGE_OUT indicating that burst buffer stage-out
operation is in progress.
-- Correct SLURM_NTASKS and SLURM_NPROCS environment variable for heterogeneous
job step. Report values representing full allocation.
-- Expand advanced reservation feature specification to support parenthesis and
counts of nodes with specified features. Nodes with the feature currently
active will be prefered.
-- Defer job signaling until prolog is completed
-- Have the primary slurmctld wait until the backup has completely shutdown
before taking control.
-- Fix issue where unpacking job state after TRES count changed could lead to
invalid reads.
-- Heterogeneous job steps allocations supported with
* Open MPI (with Slurm's PMI2 and PMIx plugins) and
* Intel MPI (with Slurm's PMI2 plugin)
-- Remove redundant function arguments from task plugins:
* Remove "job_id" field from task_p_slurmd_batch_request() function.
* Remove "job_id" field from task_p_slurmd_launch_request() function.
* Remove "job_id" field from task_p_slurmd_reserve_resources() function.
-- Change function name from node_features_p_changible_feature() to
node_features_p_changeable_feature in node_features plugin.
-- Add Slurm configuration file check logic using "slurmctld -t" command.
* Changes in Slurm 17.11.6
==========================
-- CRAY - Add slurmsmwd to the contribs/cray dir.
-- sview - fix crash when closing any search dialog.
* Changes in Slurm 17.11.5
==========================
-- Fix cloud nodes getting stuck in DOWN+POWER_UP+NO_RESPOND state after not
responding by ResumeTimeout.
-- Add job's array_task_cnt and user_name along with partitions
[max|def]_mem_per_[cpu|node], max_cpus_per_node, and max_share with the
SHARED_FORCE definition to the job_submit/lua plugin.
-- srun - fix for SLURM_JOB_NUM_NODES env variable assignment.
-- sacctmgr - fix runaway jobs identification.
-- Fix for setting always the correct status on job update in mysql.
-- Fix issue if running with an association manager cache (slurmdbd was down
when slurmctld was started) you could loose QOS usage information.
-- CRAY - Fix spec file to work correctly.
-- Set scontrol exit code to 1 if attempting to update a node state to DRAIN
or DOWN without specifying a reason.
-- Fix race condition when running with an association manager cache
(slurmdbd was down when slurmctld was started).
-- Print out missing SLURM_PERSIST_INIT slurmdbd message type.
-- Fix two build errors related to use of the O_CLOEXEC flag with older glibc.
-- Add Google Cloud Platform integration scripts into contribs directory.
-- Fix minor potential memory leak in backfill plugin.
-- Add missing node flags (maint/power/etc) to node states.
-- Fix issue where job time limits may end up at 1 minute when using the
NoReserve flag on their QOS.
-- Fix security issue in accounting_storage/mysql plugin by always escaping
strings within the slurmdbd. CVE-2018-7033.
* Changes in Slurm 17.11.4
==========================
-- Add fatal_abort() function to be able to get core dumps if we hit an
"impossible" edge case.
-- Link slurmd against all libraries that slurmstepd links to.
-- Fix limits enforce order when they're set at partition and other levels.
-- Add slurm_load_single_node() function to the Perl API.
-- slurm.spec - change dependency for --with lua to use pkgconfig.
-- Fix small memory leaks in node_features plugins on reconfigure.
-- slurmdbd - only permit requests to update resources from operators or
administrators.
-- Fix handling of partial writes in io_init_msg_write_to_fd() which can
lead to job step launch failure under higher cluster loads.
-- MYSQL - Fix to handle quotes in a given work_dir of a job.
-- sbcast - fix a race condition that leads to "Unspecified error".
-- Log that support for the ChosLoc configuration parameter will end in Slurm
version 18.08.
-- Fix backfill performance issue where bf_min_prio_reserve was not respected.
-- Fix MaxQueryTimeRange checks.
-- Print MaxQueryTimeRange in "sacctmgr show config".
-- Correctly check return codes when creating a step to check if needing to
wait to retry or not.
-- Fix issue where a job could be denied by Reason=MaxMemPerLimit when not
requesting any tasks.
-- In perl tools, fix for regexp that caused extra incorrectly shown results.
-- Add some extra locks in fed_mgr to be extra safe.
-- Minor memory leak fixes in the fed_mgr on slurmctld shutdown.
-- Make sreport job reports also report duplicate jobs correctly.
-- Fix issues restoring certain Partition configuration elements, especially
when ReconfigFlags=KeepPartInfo is enabled.
-- Don't add TRES whose value is NO_VAL64 when building string line.
-- Fix removing array jobs from hash in slurmctld.
-- Print out missing user messages from jobsubmit plugin when srun/salloc are
waiting for an allocation.
-- Handle --clusters=all as case insensitive.
-- Only check requested clusters in federation when using --test-only
submission option.
-- In the federation, make it so you can cancel stranded sibling jobs.
-- Silence an error from PSS memory stat collection process.
-- Requeue jobs allocated to nodes requested to DRAIN or FAIL if nodes are
POWER_SAVE or POWER_UP, preventing jobs to start on NHC-failed nodes.
-- Make MAINT and OVERLAP resvervation flags order agnostic on overlap test.
-- Preserve node features when slurmctld daemons reconfigured including active
and available KNL features.
-- Prevent creation of multiple io_timeout threads within srun, which can
lead to fatal() messages when those unexpected and additional mutexes are
destroyed when srun shuts down.
-- burst_buffer/cray - Prevent use of "#DW create_persistent" and
"#DW destroy_persistent" directives available in Cray CLE6.0UP06. This
will be supported in Slurm version 18.08. Use "#BB" directives until then.
-- Fix task/cgroup affinity to behave correctly.
-- FreeBSD - fix build on systems built with WITHOUT_KERBEROS.
-- Fix to restore pn_min_memory calculated result to correctly enforce
MaxMemPerCPU setting on a partition when the job uses --mem.
-- slurmdbd - prevent infinite loop if a QOS is set to preempt itself.
-- Fix issue with log rotation for slurmstepd processes.
* Changes in Slurm 17.11.3-2
==========================
-- Revert node_features changes in 17.11.3 that lead to various segfaults on
slurmctld startup.
* Changes in Slurm 17.11.3
==========================
-- Send SIG_UME correctly to a step.
-- Sort sreport's reservation report by cluster, time_start, resv_name instead
of cluster, resv_name, time_start.
-- Avoid setting node in COMPLETING state indefinitely if the job initiating
the node reboot is cancelled while the reboot in in progress.
-- Scheduling fix for changing node features without any NodeFeatures plugins.
-- Improve logic when summarizing job arrays mail notifications.
-- Add scontrol -F/--future option to display nodes in FUTURE state.
-- Fix REASONABLE_BUF_SIZE to actually be 3/4 of MAX_BUF_SIZE.
-- When a job array is preempting make it so tasks in the array don't wait
to preempt other possible jobs.
-- Change free_buffer to FREE_NULL_BUFFER to prevent possible double free
in slurmstepd.
-- node_feature/knl_cray - Fix memory leaks that occur when slurmctld
reconfigured.
-- node_feature/knl_cray - Fix memory leak that can occur during normal
operation.
-- Fix srun environment variables for --prolog script.
-- Fix job array dependency with "aftercorr" option and some task arrays in
the first job fail. This fix lets all task array elements that can run
proceed rather than stopping all subsequent task array elements.
-- Fix potential deadlock in the slurmctld when using list_for_each.
-- Fix for possible memory corruption in srun when running heterogeneous job
steps.
-- Fix job array dependency with "aftercorr" option and some task arrays in
the first job fail. This fix lets all task array elements that can run
proceed rather than stopping all subsequent task array elements.
-- Fix output file containing "%t" (task ID) for heterogeneous job step to
be based upon global task ID rather than task ID for that component of the
heterogeneous job step.
-- MYSQL - Fix potential abort when attempting to make an account a parent of
itself.
-- Fix potentially uninitialized variable in slurmctld.
-- MYSQL - Fix issue for multi-dimensional machines when using sacct to
find jobs that ran on specific nodes.
-- Reject --acctg-freq at submit if invalid.
-- Added info string on sh5util when deleting an empty file.
-- Correct dragonfly topology support when job allocation specifies desired
switch count.
-- Fix minor memory leak on an sbcast error path.
-- Fix issues when starting the backup slurmdbd.
-- Revert uid check when requesting a jobid from a pid.
-- task/cgroup - add support to detect OOM_KILL cgroup events.
-- Fix whole node allocation cpu counts when --hint=nomultihtread.
-- Allow execution of task prolog/epilog when uid has access
rights by a secondary group id.
-- Validate command existence on the srun *[pro|epi]log options
if LaunchParameter test_exec is set.
-- Fix potential memory leak if clean starting and the TRES didn't change
from when last started.
-- Fix for association MaxWall enforcement when none is given at submission.
-- Add a job's allocated licenses to the [Pro|Epi]logSlurmctld.
-- burst_buffer/cray: Attempts by job to create persistent burst buffer when
one already exists owned by a different user will be logged and the job
held.
-- CRAY - Remove race in the core_spec where we add the slurmstepd to the
job container where if the step was canceled would also cancel the stepd
erroneously.
-- Make sure the slurmstepd blocks signals like SIGTERM correctly.
-- SPANK - When slurm_spank_init_post_opt() fails return error correctly.
-- When revoking a sibling job in the federation we want to send a start
message before purging the job record to get the uid of the revoked job.
-- Make JobAcctGatherParams options case-insensitive. Previously, UsePss
was the only correct capitialization; UsePSS or usepss were silently
ignored.
-- Prevent pthread_atfork handlers from being added unnecessarily after
'scontrol reconfigure', which can eventually lead to a crash if too
many handlers have been registered.
-- Better debug messages when MaxSubmitJobs is hit.
-- Docs - update squeue man page to describe all possible job states.
-- Prevent orphaned step_extern steps when a job is cancelled while the
prolog is still running.
* Changes in Slurm 17.11.2
==========================
-- jobcomp/elasticsearch - append Content-Type to the HTTP header.
-- MYSQL - Fix potential abort of slurmdbd when job has no TRES.
-- Add advanced reservation flag of "REPLACE_DOWN" to replace DOWN or DRAINED
nodes.
-- slurm.spec-legacy - add missing libslurmfull.so to slurm.files.
-- Fix squeue job ID filtering for pending job array records.
-- Fix potential deadlock in _run_prog() in power save code.
-- MYSQL - Add dynamic_offset in the database to force range for auto
increment ids for the tres_table.
-- MYSQL - Fix fallout from MySQL auto increment bug, see RELEASE_NOTES,
only affects current 17.11 users tracking licenses or GRES in the database.
-- Refactor logging logic to avoid possible memory corruption on non-x86
architectures.
-- Fix memory leak when getting jobs from the slurmdbd.
-- Fix incorrect logic behind MemorySwappiness, and only set the value when
specified in the configuration.
* Changes in Slurm 17.11.1-2
============================
-- MYSQL - Make index for pack_job_id
* Changes in Slurm 17.11.1
==========================
-- Fix --with-shared-libslurm option to work correctly.
-- Make it so only daemons log errors on configuration option duplicates.
-- Fix for ConstrainDevices=yes to work correctly.
-- Fix to purge old jobs using burst buffer if slurmctld daemon restarted
after the job's burst buffer work was already completed.
-- Make logging prefix for slurmstepd to happen as soon as possible.
-- mpi/pmix: Fix the job registration for the PMIx v2.1.
-- Fix uid check for signaling a step with anything but SIGKILL.
-- Return ESLURM_TRANSITION_STATE_NO_UPDATE instead of EAGAIN when trying to
signal a step that is still running a prolog.
-- Update Cray slurm_playbook.yaml with latest recommended version.
-- Only say a prolog is done running after the extern step is launched.
-- Wait to start a batch step until the prolog and extern step are
fully ran/launched. Only matters if running with
PrologFlags=[contain|alloc].
-- Truncate a range for SlurmctldPort to FD_SETSIZE elements and throw an
error, otherwise network traffic may be lost due to poll() not detecting
traffic.
-- Fix for srun --pack-group option that can reuse/corrupt memory.
-- Fix handling ultra long hostlists in a hostfile.
-- X11: fix xauth regex to handle '-' in hostnames again.
-- Fix potential node reboot timeout problem for "scontrol reboot" command.
-- Add ability for squeue to sort jobs by submit time.
-- CRAY - Switch to standard pid files on Cray systems.
-- Update jobcomp records on duplicate inserts.
-- If unrecognized configuration file option found then print an appropriate
fatal error message rather than relying upon random errno value.
-- Initialize job_desc_msg_t's instead of just memset'ing them.
-- Fix divide by zero when job requests no tasks and more memory than
MaxMemPer{CPU|NODE}.
-- Avoid changing Slurm internal errno on syslog() failures.
-- BB - Only launch dependent jobs after the burst buffer is staged-out
completely instead of right after the parent job finishes.
-- node_features/knl_generic - If plugin can not fully load then do not spawn
a background pthread (which will fail with invalid memory reference).
-- Don't set the next jobid to give out to the highest jobid in the system on
controller startup. Just use the checkpointed next use jobid.
-- Docs - add Slurm/PMIx and OpenMPI build notes to the mpi_guide page.
-- Add lustre_no_flush option to LaunchParameters for Native Cray systems.
-- Fix rpmbuild issue with rpm 4.13+ / Fedora 25+.
-- sacct - fix the display for the NNodes field when using the --units option.
-- Prevent possible double-xfree on a buffer in stepd_completion.
-- Fix for record job state on successful allocation but failed reply message.
-- Fill in the user_name field for batch jobs if not sent by the slurmctld.
(Which is the default behavior if PrologFlags=send_gids is not enabled.)
This prevents job launch problems for sites using UsePAM=1.
-- Handle syncing federated jobs that ran on non-origin clusters and were
cancelled while the origin cluster was down.
-- Fix accessing variable outside of lock.
-- slurm.spec: move libpmi to a separate package to solve a conflict with the
version provided by PMIx. This will require a separate change to PMIx as
well.
-- X11 forwarding: change xauth handling to use hostname/unix:display format,
rather than localhost:display.
-- mpi/pmix - Fix warning if not compiling with debug.
* Changes in Slurm 17.11.0
==========================
-- Fix documentation for MaxQueryTimeRange option in slurmdbd.conf.
-- Avoid srun abort trying to run on heterogeneous job component that has
ended.
-- Add SLURM_PACK_JOB_ID,SLURM_PACK_JOB_OFFSET to PrologSlurmctld and
EpilogSlurmctld environment.
-- Treat ":" in #SBATCH arguments as fatal error. The "#SBATCH packjob" syntax
must be used instead.
-- job_submit/lua plugin: expose pack_job fields to get.
-- Prevent scheduling deadlock with multiple components of heterogeneous job
in different partitions (i.e. one heterogeneous job component is higher
priority in one partition and another component is lower priority in a
different partition).
-- Fix for heterogeneous job starvation bug.
-- Fix some slurmctld memory leaks.
-- Add SLURM_PACK_JOB_NODELIST to PrologSlurmctld and EpilogSlurmctld
environment.
-- If PrologSlurmctld fails for pack job leader then requeue or kill all
components of the job.
-- Fix for mulitple --pack-group srun arguments given out of order.
-- Update slurm.conf(5) man page with updated example logrotate script.
-- Add SchedulerParameters=whole_pack configuration parameter. If set, then
hold, release and cancel operations on any component of a heterogeneous job
will be applied to all components
-- Handle FQDNs in xauth cookies for x11 display forwarding properly.
-- For heterogeneous job steps, the srun --open-mode option default value will
be set to "append".
-- Pack job scheduling list not being cleared between runs of the backfill
scheduler resulted in various anomalies.
-- Fix that backward compat for pmix version < 1.1.5.
-- Fix use-after-free that can lead to slurmstepd segfaulting when setting
ulimit values.
-- Add heterogeneous job start data to sdiag output.
-- X11 forwarding - handle systems with X11UseLocalhost=no set in sshd_config.
-- Fix potential missing issue with missin symbols in gres plugins.
-- Ignore querying clusters in federation that are down from status commands.
-- Base federated jobs off of origin job and not the local cluster in API.
-- Remove erroneous double '-' on rpath for libslurmfull.
-- Remove version from libslurmfull and move it to $LIBDIR/slurm since the ABI
could change from one version to the other.
-- Fix unused wall time for reservations.
-- Convert old reservation records to insert unused wall into the rows.
-- slurm.spec: further restructing and improvements.
-- Allow nodes state to be updated between FAIL and DRAIN.
-- x11 forwarding: handle build with alternate location for libssh2.
* Changes in Slurm 17.11.0rc3
==============================
-- Fix extern step to wait until launched before allowing job to start.
-- Add missing locks around figuring out TRES when clean starting the
slurmctld.
-- Cray modulefile: avoid removing /usr/bin from path on module unload.
-- Make reoccurring reservations show up in the database.
-- Adjust related resources (cpus, tasks, gres, mem, etc.) when updating
NumNodes with scontrol.
-- Don't initialize MPI plugins for batch or extern steps.`
-- slurm.spec - do not install a slurm.conf file under /etc/ld.so.conf.d.
-- X11 forwarding - fix keepalive message generation code.
-- If heterogeneous job step is unable to acquire MPI reserved ports then
avoid referencing NULL pointer. Retry assigning ports ONLY for
non-heterogeneous job steps.
-- If any acct_gather_*_init fails fatal instead of error and keep going.
-- launch/slurm plugin - Avoid using global variable for heterogeneous job
steps, which could corrupt memory.
* Changes in Slurm 17.11.0rc2
==============================
-- Prevent slurmctld abort with NodeFeatures=knl_cray and non-KNL nodes lacking
any configured features.
-- The --cpu_bind and --mem_bind options have been renamed to --cpu-bind
and --mem-bind for consistency with the rest of Slurm's options. Both
old and new syntaxes are supported for now.
-- Add slurmdb_connection_commit to the slurmdb api to commit when needed.
-- Add the federation api's to the slurmdb.h file.
-- Add job functions to the db_api.
-- Fix sacct to always use the db_api instead of sometimes calling functions
directly.
-- Fix sacctmgr to always use the db_api instead of sometimes calling functions
directly.
-- Fix sreport to always use the db_api instead of sometimes calling functions
directly.
-- Make global uid to the db_api to minimize calls to getuid().
-- Add support for HWLOC version 2.0.
-- Added more validation logic for updates to node features.
-- Added node_features_p_node_update_valid() function to node_features plugin.
-- If a job is held due to bad constraints and a node's features change then
test the job again to see if can run with the new features.
-- Added node_features_p_changible_feature() function to node_features plugin.
-- Avoid rebooting a node if a job's requested feature is not under the control
of the node_features plugin and is not currently active.
-- node_features/knl_generic plugin: Do not clear a node's non-KNL features
specified in slurm.conf.
-- Added SchedulerParameters configuration option "disable_hetero_steps" to
disable job steps that span multiple components of a heterogeneous job.
Disabled by default except with mpi/none plugin. This limitation to be
removed in Slurm version 18.08.
* Changes in Slurm 17.11.0rc1
==============================
-- Added the following jobcomp/script environment variables: CLUSTER,
DEPENDENCY, DERIVED_EC, EXITCODE, GROUPNAME, QOS, RESERVATION, USERNAME.
The format of LIMIT (job time limit) has been modified to D-HH:MM:SS.
-- Fix QOS usage factor applying to individual TRES run minute usage.
-- Print numbers using exponential format if required to fit in allocated
field width. The sacctmgr and sshare commands are impacted.
-- Make it so a backup DBD doesn't attempt to create database tables and
relies on the primary to do so.
-- By default have Slurm dynamically link to libslurm.so instead of static
linking. If static linking is desired configure with
--without-shared-libslurm.
-- Change --workdir in sbatch to be --chdir as in all other commands (salloc,
srun).
-- Add WorkDir to the job record in the database.
-- Make the UsageFactor of a QOS work when a qos has the nodecay flag.
-- Add MaxQueryTimeRange option to slurmdbd.conf to limit accounting query
ranges when fetching job records.
-- Add LaunchParameters=batch_step_set_cpu_freq to allow the setting of the cpu
frequency on the batch step.
-- CRAY - Fix statically linked applications to CRAY's PMI.
-- Fix - Raise an error back to the user when trying to update currently
unsupported core-based reservations.
-- Do not print TmpDisk space as part of 'slurmd -C' line.
-- Fix to test MaxMemPerCPU/Node partition limits when scheduling, previously
only checked on submit.
-- Work for heterogeneous job support (complete solution in v17.11):
* Set SLURM_PROCID environment variable to reflect global task rank (needed
by MPI).
* Set SLURM_NTASKS environment variable to reflect global task count (needed
by MPI).
* In srun, if only some steps are allocated and one step allocation fails,
then delete all allocated steps.
* Get SPANK plungins working with heterogeneous jobs. The
spank_init_post_opt() function is executed once per job component.
* Modify sbcast command and srun's --bcast option to support heterogeneous
jobs.
* Set more environment variables for MPI: SLURM_GTIDS and SLURM_NODEID.
* Prevent a heterogeneous job allocation from including the same nodes in
multiple components (required by MPI jobs spanning components).
* Modify step create logic so that call components of a heterogeneous job
launched by a single srun command have the same step ID value.
-- Modify output of "--mpi=list" to avoid duplicates for version numbers in
mpi/pmix plugin names.
-- Allow nodes to be rebooted while in a maintenance reservation.
-- Show nodes as down even when nodes are in a maintenance reservation.
-- Harden the slurmctld HA stack to mitigate certain split-brain issues.
-- Work for heterogeneous job support (complete solution in v17.11):
* Add burst buffer support.
* Remove srun's --mpi-combine option (always combined).
* Add SchedulerParameters configuration option "enable_hetero_steps" to
enable job steps that span multiple components of a heterogeneous job.
Disabled by default as most MPI implementations and Slurm configurations
are not currently supported. Limitation to be removed in Slurm version
18.08.
* Synchronize application launch across multiple components with debugger.
* Modify slurm_kill_job_step() to cancel all components of a heterogeneous
job step (used by MPI).
* Set SLURM_JOB_NUM_NODES environment variable as needed by MVAPICH.
* Base time limit upon the time that the latest job component is available
(after all nodes in all components booted and ready for use).
-- Add cluster name to smail tool email header.
-- Speedup arbitrary distribution algorithm.
-- Modify "srun --mpi=list" output to match valid option input by removing the
"mpi/" prefix on each line of output.
-- Automatically set the reservation's partition for the job if not the
cluster default.
-- mpi/pmi2 plugin - vestigial pointer could be referenced at shutdown with
invalid memory reference resulting.
-- Fix to _is_gres_cnt_zero() return false for improper input string
-- Cleanup all pthread_create calls and replace with new slurm_thread_create
macro.
-- Removed obsolete MPI plugins. Remaining options are openmpi, pmi2, pmix.
-- Removed obsolete checkpoint/poe plugin.
-- Process spank environment variable options before processing spank command
line options. Spank plugins should be able to handle option callbacks being
called multiple times.
-- Add support for specialized cores with task/affinity plugin (previously
only supported with task/cgroup plugin).
-- Add "TaskPluginParam=SlurmdOffSpec" option that will prevent the Slurm
compute node daemons (slurmd and slurmstepd) from executing on specialized
cores.
-- CRAY - Make native mode default, use --disable-native-cray to use ALPS
instead of native Slurm.
-- Add ability to prevent suspension of some count of nodes in a specified
range using the SuspendExcNodes configuration parameter.
-- Add SLURM_WCKEY to PrologSlurmctld and EpilogSlurmctld environment.
-- Return user response string in response to successful job allocation request
not only on failure. Set in LUA using function 'slurm.user_msg("STRING")'.
-- Add 'scontrol write batch_script <jobid>' command to retrieve the batch
script for a given job.
-- Remove option to display the batch script as part of 'scontrol show job'.
-- On native Cray system the configured RebootProgram is executed on on the
head node by the slurmctld daemon rather than by the slurmd daemons on the
compute nodes. The "capmc_resume" program from "contribs/cray" can be used.
-- Modify "scontrol top" command to accept a comma separated list of job IDs
as an argument rather than a single job ID.
-- Add MemorySwappiness value to cgroup.conf.
-- Add new "billing" TRES which allows jobs to be limited based on the job's
billable TRES calculated by the job's partition's TRESBillingWeights.
-- sbatch - force line-buffered output so 'sbatch -W' returns the jobid
over a piped output immediately.
-- Regular user use of "scontrol top" command is now diabled. Use the
configuration parameter "SchedulerParameters=enable_user_top" to enable
that functionality. The configuration parameter
"SchedulerParameters=disable_user_top" will be silently ignored.
-- Add -TALL to sreport.
-- Removed unused SlurmdPlugstack option and associated framework.
-- Correct logic for line continuation in srun --multi-prog file.
-- Add DBD Agent queue size to sdiag output.
-- Add running job count to sdiag output.
-- Print unix timestamps next to ASCII timestamps in sdiag output.
-- In a job allocation spanning KNL and non-KNL nodes and requiring a reboot,
do not attempt to set default NUMA or MCDRAM modes on non-KNL nodes.
-- Change default to let pending jobs run outside of reservation after
reservation is gone to put jobs in held state. Added NO_HOLD_JOBS_AFTER_END
reservation flag to use old default.
-- When creating a reservation, validate the CoreCnt specification matches
the number of nodes listed.
-- When creating a reservation, correct logic to ignoring job allocations on
request.
-- Deprecate BLCR plugin, and do not build by default.
-- Change sreport report titles from "Use" to "Usage"
* Changes in Slurm 17.11.0pre2
==============================
-- Initial work for heterogeneous job support (complete solution in v17.11):
* Modified salloc, sbatch and srun commands to parse command line, job
script and environment variables to recognize requests for heterogeneous
jobs. Same commands also modified to set environment variables describing
each component of the heterogeneous job.
* Modified job allocate, batch job submit and job "will-run" requests to
pass a list of job specifications and get a list of responses.
* Modify slurmctld daemon to process a heterogeneous job request and create
multiple job records as needed.
* Added new fields to job record: pack_job_id, pack_job_offset and
pack_job_set (set of job IDs). Added to slurmctld state save/restore
logic and job information reported.
* Display new job fields in "scontrol show job" output.
* Modify squeue command to display heterogeneous job records using "#+#"
format. The squeue --job=# output lists all components of a heterogeneous
job.
* Modify scancel logic to cancel all components of a heterogeneous job with
a single request/RPC.
* Configuration parameter DebugFlags value of "HeteroJobs" added.
* Job requeue and suspend/resume modified to operate on all components of
a heterogeneous job with a single request/RPC.
* New web page added to describe heterogeneous jobs.
* Descriptions of new API added to man pages.
* Modified email notifications to only operate on the first job component.
* Purge heterogeneous job records at the same time and not by individual
components.
* Modified logic for heterogeneous jobs submitted to multiple clusters
("--clusters=...") so the job will be routed to the cluster that is
expected to start all components earliest.
* Modified srun to create multiple job steps for heterogeneous job
allocations.
* Modified launch plugin to accept a pointer to job step options structure
rather than work from a single/common data structure.
-- Improve backfill scheduling algorithm with respect to starting jobs as soon
as possible while avoiding advanced reservations.
-- Add URG as an option to 'scancel --signal'.
-- Check if the buffer returned from slurm_persist_msg_pack() isn't NULL.
-- Modify all daemons to re-open log files on receipt of SIGUSR2 signal. This
is much than using SIGHUP to re-read the configuration file and rebuild
various tables.
-- Add PrivateData=events configuration parameter
-- Work for heterogeneous job support (complete solution in v17.11):
* Add pointer to job option structure to job_step_create_allocation()
function used by srun.
* Parallelize task launch for heterogeneous job allocations (initial work).
* Make packjobid, packjoboffset, and packjobidset fields available in squeue
output.
* Modify smap command to display heterogeneous job records using "#+#"
format.
* Add srun --pack-group and --mpi-combine options to control job step
launch behaviour (not fully implemented).
* Add pack job component ID to srun --label output (e.g. "P0 1:" for
job component 0 and task 1).
* jobcomp/elasticsearch: Add pack_job_id and pack_job_offset fields.
* sview: Modified to display pack job information.
* Major re-write of task state container logic to support for list of
containers rather than one container per srun command.
* Add some regression tests.
* Add srun pack job environment variables when performing job allocation.
-- Set Reason=dependency over Reason=JobArrayTaskLimit for pending jobs.
-- Add slurm.conf configuration parameters SlurmctldSyslogDebug and
SlurmdSyslogDebug to control which messages from the slurmctld and slurmd
daemons get written to syslog.
-- Add slurmdbd.conf configuration parameter DebugLevelSyslog to control which
messages from the slurmdbd daemon get written to syslog.
-- Fix handling of GroupUpdateForce option.
-- Work for heterogeneous job support (complete solution in v17.11):
* Add support to sched/backfill for concurrent allocation of all pack job
components including support of --time-min option.
* Defer initiation of a heterogeneous job until a components can be started
at the same time, taking into consideration association and QOS limits
for the job as a whole.
* Perform limit check on heterogeneous job as a whole at submit time to
reject jobs that will never be able to run.
* Add pack_job_id and pack_job_offset to accounting database.
* Modified sacct to accept pack job ID specification using "#+#" notation.
* Modified sstat to accept pack job ID specification using "#+#" notation.
-- Clear a job's "wait reason" value of BeginTime" after that time has passed.
Previously a readon of "BeginTime" could be reported long after the job's
requested begin time had passed.
-- Split group_info in slurm_ctl_conf_t into group_force and group_time.
-- Work for heterogeneous job support (complete solution in v17.11):
* Fix I/O race condition on step termination for srun launching multiple
pack job groups.
* If prolog is running when attempting to signal a step, then return EAGAIN
and retry rather than simply returning SLURM_ERROR and aborting.
* Modify launch/slurm plugin to signal all components of a pack job rather
than just the one (modify to use a list of step context records).
* Add logic to support srun --mpi-combine option.
* Set up debugger data structures.
* Disable cancellation of individual component while the job is pending.
* Modify scontrol job hold/release and update to operate with heterogeneous
job id specification (e.g. "scontrol hold 123+4").
* If srun lacks application specification for some component, the next one
specified will be used for earlier components.
* Changes in Slurm 17.11.0pre1
==============================
-- Interpet all format options in output/error file to log prolog errors. Prior
logic only supported "%j" (job ID) option.
-- Add the configure option --with-shared-libslurm which will link to
libslurm.so instead of libslurm.o thus reducing the footprint of all the
binaries.
-- In switch plugin, added plugin_id symbol to plugins and wrapped
switch_jobinfo_t with dynamic_plugin_data_t in interface calls in
order to pass switch information between clusters with different switch
types.
-- Switch naming of acct_gather_infiniband to acct_gather_interconnect
-- Make it so you can "stack" the interconnect plugins.
-- Add a last_sched_eval timestamp to record when a job was last evaluated
by the main scheduler or backfill.
-- Add scancel "--hurry" option to avoid staging out any burst buffer data.
-- Simplify the sched plugin interface.
-- Add new advanced reservation flags of "weekday" (repeat on each weekday;
Monday through Friday) and "weekend" (repeat on each weekend day; Saturday
and Sunday).
-- Add new advanced reservation flag of "flex", which permits jobs requesting
the reservation to begin prior to the reservation's start time and use
resources inside or outside of the reservation. A typical use case is to
prevent jobs not explicitly requesting the reservation from using those
reserved resources rather than forcing jobs requesting the reservation to
use those resources in the time frame reserved.
-- Add NoDecay flag to QOS.
-- Node "OS" field expanded from "sysname" to "sysname release version" (e.g.
change from "Linux" to
"Linux 4.8.0-28-generic #28-Ubuntu SMP Sat Feb 8 09:15:00 UTC 2017").
-- jobcomp/elasticsearch - Add "job_name" and "wc_key" fields to stored
information.
-- jobcomp/filetxt - Add ArrayJobId, ArrayTaskId, ReservationName, Gres,
Account, QOS, WcKey, Cluster, SubmitTime, EligibleTime, DerivedExitCode and
ExitCode.
-- scontrol modified to report core IDs for reservation containing individual
cores.
-- MYSQL - Get rid of table join during rollup which speeds up the process
dramatically on large job/step tables.
-- Add ability to define features on clusters for directing federated jobs to
different clusters.
-- Add new RPC to process multiple federation RPCs in a single communication.
-- Modify slurm_load_jobs() function to load job information from all clusters
in a federation.
-- Add squeue --local and --sibling options to modify filtering of jobs on
federated clusters.
-- Add SchedulerParameters option of bf_max_job_user_part to specifiy the
maximum number of jobs per user for any single partition. This differs from
bf_max_job_user in that a separate counter is applied to each partition
rather than having a single counter per user applied to all partitions.
-- Modify backfill logic so that bf_max_job_user, bf_max_job_part and
bf_max_job_user_part options can all be used independently of each other.
-- Add sprio -p/--partition option to filter jobs by partition name.
-- Add partition name to job priority factor response message.
-- Add sprio --local and --sibling options for use in federation of clusters.
-- Add sprio "%c" format to print cluster name in federation mode.
-- Modify sinfo logic to provided unified view of all nodes and partitions
in a federation, add --local option to only report local state information
even in a cluster, print cluster name with "%V" format option, and
optionally sort by cluster name.
-- If a task in a parallel job fails and it was launched with the
--kill-on-bad-exit option then terminate the remaining tasks using the
SIGCONT, SIGTERM and SIGKILL signals rather than just sending SIGKILL.
-- Include submit_time when doing the sort for job scheduling.
-- Modify sacct to report all jobs in federation by default. Also add --local
option.
-- Modify sacct to accept "--cluster all" option (in addition to the old
"--cluster -1", which is still accepted).
-- Modify sreport to report all jobs in federation by default. Also add --local
option.
-- sched/backfill: Improve assoc_limit_stop configuration parameter support.
-- KNL features: Always keep active and available features in the same order:
first site-specific features, next MCDRAM modes, last NUMA modes.
-- Changed default ProctrackType to cgroup.
-- Add "cluster_name" field to node_info_t and partition_info_t data structure.
It is filled in only when the cluster is part of a federation and
SHOW_FEDERATION flag used.
-- Functions slurm_load_node() slurm_load_partitions() modified to show all
nodes/partitions in a federation when the SHOW_FEDERATION flag is used.
-- Add federated views to sview.
-- Add --federation option to sacct, scontrol, sinfo, sprio, squeue, sreport to
show a federated view. Will show local view by default.
-- Add FederationParameters=fed_display slurm.conf option to configure status
commands to display a federated view by default if the cluster is a member
of a federation.
-- Log the down nodes whenever slurmctld restarts.
-- Report that "CPUs" plus "Boards" in node configuration invalid only if the
CPUs value is not equal to the total thread count.
-- Extend the output of the seff utility to also include the job's wall-clock
time.
-- Add bf_max_time to SchedulerParameters.
-- Add bf_max_job_assoc to SchedulerParameters.
-- Add new SchedulerParameters option bf_window_linear to control the rate at
which the backfill test window expands. This can be used on a system with
a modest number of running jobs (hundreds of jobs) to help prevent expected
start times of pending jobs to get pushed forward in time. On systems with
large numbers of running jobs, performance of the backfill scheduler will
suffer and fewer jobs will be evaluated.
-- Improve scheduling logic with respect to license use and node reboots.
-- CRAY - Alter algorithm to come up with the SLURM_ID_HASH.
-- Implement federated scheduling and federated status outputs.
-- The '-q' option to srun has changed from being the short form of
'--quit-on-interrupt' to '--qos'.
-- Change sched_min_interval default from 0 to 2 microseconds.
* Changes in Slurm 17.02.11
==========================
* Changes in Slurm 17.02.10
==========================
-- Fix updating of requested TRES memory.
-- Cray modulefile: avoid removing /usr/bin from path on module unload.
-- Fix issue when resetting the partition pointers on nodes.
-- Show reason field in 'sinfo -R' when nodes is marked as failed.
-- Fix potential of slurmstepd segfaulting when the extern step fails to start.
-- Allow nodes state to be updated between FAIL and DRAIN.
-- Avoid registering a job'd credential multiple times.
-- Fix sbatch --wait to stop waiting after job is gone from memory.
-- Fix memory leak of MailDomain configuration string when slurmctld daemon is
reconfigured.
-- Fix to properly remove extern steps from the starting_steps list.
-- Fix Slurm to work correctly with HDF5 1.10+.
-- Add support in salloc/srun --bb option for "access_mode" in addition to
"access" for consistency with DW options.
-- Fix potential deadlock in _run_prog() in power save code.
-- MYSQL - Add dynamic_offset in the database to force range for auto
increment ids for the tres_table.
-- Avoid setting node in COMPLETING state indefinitely if the job initiating
the node reboot is cancelled while the reboot in in progress.
-- node_feature/knl_cray - Fix memory leaks that occur when slurmctld
reconfigured.
-- node_feature/knl_cray - Fix memory leak that can occur during normal
operation.
-- Fix job array dependency with "aftercorr" option and some task arrays in
the first job fail. This fix lets all task array elements that can run
proceed rather than stopping all subsequent task array elements.
-- Fix whole node allocation cpu counts when --hint=nomultihtread.
-- NRT - Fix issue when running on a HFI (p775) system with multiple protocols.
-- Fix uninitialized variables when unpacking slurmdb_archive_cond_t.
-- Fix security issue in accounting_storage/mysql plugin by always escaping
strings within the slurmdbd. CVE-2018-7033.
* Changes in Slurm 17.02.9
==========================
-- When resuming powered down nodes, mark DOWN nodes right after ResumeTimeout
has been reached (previous logic would wait about one minute longer).
-- Fix sreport not showing full column name for TRES Count.
-- Fix slurmdb_reservations_get() giving wrong usage data when job's spanned
reservation that was modified.
-- Fix sreport reservation utilization report showing bad data.
-- Show all TRES' on a reservation in sreport reservation utilization report by
default.
-- Fix sacctmgr show reservation handling "end" parameter.
-- Work around issue with sysmacros.h and gcc7 / glibc 2.25.
-- Fix layouts code to only allow setting a boolean.
-- Fix sbatch --wait to keep waiting even if a message timeout occurs.
-- CRAY - If configured with NodeFeatures=knl_cray and there are non-KNL
nodes which include no features the slurmctld will abort without
this patch when attemping strtok_r(NULL).
-- Fix regression in 17.02.7 which would run the spank_task_privileged as
part of the slurmstepd instead of it's child process.
-- Fix security issue in Prolog and Epilog by always prepending SPANK_ to
all user-set environment variables. CVE-2017-15566.
* Changes in Slurm 17.02.8
==========================
-- Add 'slurmdbd:' to the accounting plugin to notify message is from dbd
instead of local.
-- mpi/mvapich - Buffer being only partially cleared. No failures observed.
-- Fix for job --switch option on dragonfly network.
-- In salloc with --uid option, drop supplementary groups before changing UID.
-- jobcomp/elasticsearch - strip any trailing slashes from JobCompLoc.
-- jobcomp/elasticsearch - fix memory leak when transferring generated buffer.
-- Prevent slurmstepd ABRT when parsing gres.conf CPUs.
-- Fix sbatch --signal to signal all MPI ranks in a step instead of just those
on node 0.
-- Check multiple partition limits when scheduling a job that were previously
only checked on submit.
-- Cray: Avoid running application/step Node Health Check on the external
job step.
-- Optimization enhancements for partition based job preemption.
-- Address some build warnings from GCC 7.1, and one possible memory leak if
/proc is inaccessible.
-- If creating/altering a core based reservation with scontrol/sview on a
remote cluster correctly determine the select type.
-- Fix autoconf test for libcurl when clang is used.
-- Fix default location for cgroup_allowed_devices_file.conf to use correct
default path.
-- Document NewName option to sacctmgr.
-- Reject a second PMI2_Init call within a single step to prevent slurmstepd
from hanging.
-- Handle old 32bit values stored in the database for requested memory
correctly in sacct.
-- Fix memory leaks in the task/cgroup plugin when constraining devices.
-- Make extremely verbose info messages debug2 messages in the task/cgroup
plugin when constraining devices.
-- Fix issue that would deny the stepd access to /dev/null where GRES has a
'type' but no file defined.
-- Fix issue where the slurmstepd would fatal on job launch if you have no
gres listed in your slurm.conf but some in gres.conf.
-- Fix validating time spec to correctly validate various time formats.
-- Make scontrol work correctly with job update timelimit [+|-]=.
-- Reduce the visibily of a number of warnings in _part_access_check.
-- Prevent segfault in sacctmgr if no association name is specified for
an update command.
-- burst_buffer/cray plugin modified to work with changes in Cray UP05
software release.
-- Fix job reasons for jobs that are violating assoc MaxTRESPerNode limits.
-- Fix segfault when unpacking a 16.05 slurm_cred in a 17.02 daemon.
-- Fix setting TRES limits with case insensitive TRES names.
-- Add alias for xstrncmp() -- slurm_xstrncmp().
-- Fix sorting of case insensitive strings when using xstrcasecmp().
-- Gracefully handle race condition when reading /proc as process exits.
-- Avoid error on Cray duplicate setup of core specialization.
-- Skip over undefined (hidden in Slurm) nodes in pbsnodes.
-- Add empty hashes in perl api's slurm_load_node() for hidden nodes.
-- CRAY - Add rpath logic to work for the alpscomm libs.
-- Fixes for administrator extended TimeLimit (job reason & time limit reset).
-- Fix gres selection on systems running select/linear.
-- sview: Added window decorator for maximize,minimize,close buttons for all
systems.
-- squeue: interpret negative length format specifiers as a request to
delimit values with spaces.
-- Fix the torque pbsnodes wrapper script to parse a gres field with a type
set correctly.
* Changes in Slurm 17.02.7
==========================
-- Fix deadlock if requesting to create more than 10000 reservations.
-- Fix potential memory leak when creating partition name.
-- Execute the HealthCheckProgram once when the slurmd daemon starts rather
than executing repeatedly until an exit code of 0 is returned.
-- Set job/step start and end times to 0 when using --truncate and start > end.
-- Make srun --pty option ignore EINTR allowing windows to resize.
-- When resuming node only send one message to the slurmdbd.
-- Modify srun --pty option to use configured SrunPortRange range.
-- Fix issue with whole gres not being printed out with Slurm tools.
-- Fix issue with multiple jobs from an array are prevented from starting.
-- Fix for possible slurmctld abort with use of salloc/sbatch/srun
--gres-flags=enforce-binding option.
-- Fix race condition when using jobacct_gather/cgroup where the memory of the
step wasn't always gathered correctly.
-- Better debug when slurmdbd queue is filling up in the slurmctld.
-- Fixed truncation on scontrol show config output.
-- Serialize updates from from the dbd to the slurmctld.
-- Fix memory leak in slurmctld when agent queue to the DBD has filled up.
-- CRAY - Throttle step creation if trying to create too many steps at once.
-- If failing after switch_g_job_init happened make sure switch_g_job_fini is
called.
-- Fix minor memory leak if launch fails in the slurmstepd.
-- Fix issue where UnkillableStepProgram if step was in an ending state.
-- Fix bug when tracking multiple simultaneous spawned ping cycles.
-- jobcomp/elasticsearch plugin now saves state of pending requests on
slurmctld daemon shutdown so then can be recovered on restart.
-- Fix issue when an alternate munge key when communicating on a persistent
connection.
-- Document inconsistent behavior of GroupUpdateForce option.
-- Fix bug in selection of GRES bound to specific CPUs where the GRES count
is 2 or more. Previous logic could allocate CPUs not available to the job.
-- Increase buffer to handle long /proc/<pid>/stat output so that Slurm can
read correct RSS value and take action on jobs using more memory than
requested.
-- Fix srun job jobs that can run immediately to run in the highest priority
partion when multiple partitions are listed. scontrol show jobs can
potentially show the partition list in priority order.
-- Fix starting controller if StateSaveLocation path didn't exist.
-- Fix inherited association 'max' TRES limits combining multiple limits in
the tree.
-- Sort TRES id's on limits when getting them from the database.
-- Fix issue with pmi[2|x] when TreeWidth=1.
-- Correct buffer size used in determining specialized cores to avoid possible
truncation of core specification and not reserving the specified cores.
-- Close race condition on Slurm structures when setting DebugFlags.
-- Make it so the cray/switch plugin grabs new DebugFlags on a reconfigure.
-- Fix incorrect lock levels when creating or updating a reservation.
-- Fix overlapping reservation resize.
-- Add logic to help support Dell KNL systems where syscfg is different than
the normal Intel syscfg.
-- CRAY - Fix BB to handle type= correctly, regression in 17.02.6.
* Changes in Slurm 17.02.6
==========================
-- Fix configurator.easy.html to output the SelectTypeParameters line.
-- If a job requests a specific memory requirement then gets something else
from the slurmctld make sure the step allocation is made aware of it.
-- Fix missing initialization in slurmd.
-- Fix potential degradation when running HTC (> 100 jobs a sec) like
workflows through the slurmd.
-- Fix race condition which could leave a stepd hung on shutdown.
-- CRAY - Add configuration for ATP to the ansible play script.
-- Fix potential to corrupt DBD message.
-- burst_buffer logic modified to support sizes in both SI and EIC size units
(e.g. M/MiB for powers of 1024, MB for powers of 1000).
* Changes in Slurm 17.02.5
==========================
-- Prevent segfault if a job was blocked from running by a QOS that is then
deleted.
-- Improve selection of jobs to preempt when there are multiple partitions
with jobs subject to preemption.
-- Only set kmem limit when ConstrainKmemSpace=yes is set in cgroup.conf.
-- Fix bug in task/affinity that could result in slurmd fatal error.
-- Increase number of jobs that are tracked in the slurmd as finishing at one
time.
-- Note when a job finishes in the slurmd to avoid a race when launching a
batch job takes longer than it takes to finish.
-- Improve slurmd startup on large systems (> 10000 nodes)
-- Add LaunchParameters option of cray_net_exclusive to control whether all
jobs on the cluster have exclusive access to their assigned nodes.
-- Make sure srun inside an allocation gets --ntasks-per-[core|socket]
set correctly.
-- Only make the extern step at job creation.
-- Fix for job step task layout with --cpus-per-task option.
-- Fix --ntasks-per-core option/environment variable parsing to set
the requested value, instead of always setting one (srun).
-- Correct error message when ClusterName in configuration files does not match
the name in the slurmctld daemon's state save file.
-- Better checking when a job is finishing to avoid underflow on job's
submitted to a QOS/association.
-- Handle partition QOS submit limits correctly when a job is submitted to
more than 1 partition or when the partition is changed with scontrol.
-- Performance boost for when Slurm is dealing with credentials.
-- Fix race condition which could leave a stepd hung on shutdown.
-- Add lua support for opensuse.