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NEWS
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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 19.05.0pre1
==============================
-- Run epilog and clean up allocation when a job is resized to zero and its
resources transferred to another job (--depend=expand).
-- If GRES are associated with specific sockets, identify those sockets in the
output of "scontrol show node". For example if all 4 GPUs on a node are
all associated with socket zero, then "Gres=gpu:4(S:0)". If associated
with sockets 0 and 1 then "Gres=gpu:4(S:0-1)". The information of which
specific GPUs are associated with specific GPUs is not reported, but only
available by parsing the gres.conf file.
-- Add configuration parameter "GpuFreqDef" to control a job's default GPU
frequency.
-- Make LaunchParameters=send_gids the default introducing the reverse option
"no_send_gids to go back to the original behavior.
-- Add job flags to the database. Currently used to determine which scheduler
scheduled the job.
-- Add constraints/features to the database.
-- Add last reason job didn't run before resources/priority to the database.
-- Make it so we set the alloc_node in a resource allocation based on the auth
plugin instead of the rpc call.
* Changes in Slurm 18.08.2
==========================
-- Correctly initialize variable in env_array_user_default().
-- Remove race condition when signaling starting step.
-- Fix issue where 17.11 job's using GRES in didn't initialize new 18.08
structures after unpack.
-- Stop removing nodes once the minimum CPU or node count for the job is
reached in the cons_res plugin.
-- Process any changes to MinJobAge and SlurmdTimeout in the slurmctld when
it is reconfigured to determine changes in its background timers.
-- Use previous SlurmdTimeout in the slurmctld after a reconfigure to
determine the time a node has been down.
-- Fix multi-cluster srun between clusters with different SelectType plugins.
-- Fix removing job licenses on reconfig/restart when configured license
counts are 0.
-- If a job requested multiple licenses and one license was removed then on
a reconfigure/restart all of the licenses -- including the valid ones
would be removed.
-- Fix issue where job's license string wasn't updated after a restart when
licenses were removed or added.
-- Add allow_zero_lic to SchedulerParameters.
* Changes in Slurm 18.08.1
==========================
-- Remove commented-out parts of man pages related to cons_tres work in 19.05,
as these were showing up on the web version due to a syntax error.
-- Prevent slurmctld performance issues in main background loop if multiple
backup controllers are unavailable.
-- Add missing user read association lock in burst_buffer/cray during init().
-- Fix incorrect spacing for PartitionName lines in 'scontrol write config'.
-- Fix creation of step hwloc xml file for after cpuset cgroup has been
created.
-- Add userspace as a valid default governor.
-- Add timers to group_cache_lookup so if going slow advise
LaunchParameters=send_gids.
-- Fix SLURM_STEP_GRES=none to work correctly.
-- Fix potential memory leak when a failure happens unpacking a ctld_multi_msg.
-- Fix potential double free when a faulure happens when unpacking a
node_registration_status_msg.
-- Fix sacctmgr show runaways.
-- Removed non-POSIX append operator from configure script for non-bash
support.
-- Fix incorrect spacing for PartitionName lines in 'scontrol write config'.
-- Fix sacct to not print huge reserve times when the job was never eligible.
-- burst_buffer/cray - Add missing locks around assoc_mgr when timing out a
burst buffer.
-- burst_buffer/cray - Update burst buffers when an association or qos
is removed from the system.
-- Remove documentation for deprecated Cray/ALPS systems. Please switch to
Native Cray mode instead.
-- Completely copy features when copying the list in the slurmctld.
-- PMIX - Fix issue with packing processes when using an arbitrary task
distribution.
-- Fix hostlists to be able to handle nodenames with '-' in them surrounded
by integers.
-- Added sort option to sprio output.
-- Fix correct job CPU count allocated.
-- Fix sacctmgr setting GrpJobs limit when setting GrpJobsAccrue limit.
-- Change the defaults to MemLimitEnforce=no and NoOverMemoryKill
(See RELEASE_NOTES).
-- Prevent abort when using Cray node features plugin on non-knl.
-- Add ability to reboot down nodes with scontrol reboot_nodes.
-- Protect against sending to the slurmdbd if the connection has gone away.
-- Fix invalid read when not using backup slurmctlds.
-- Prevent acct coordinators from changing default acct on add user.
-- Don't allow scontrol top do modify job priorities when priority == 1.
-- slurmsmwd - change parsing code to handle systems with the svid or inst
fields set in xtconsumer output.
-- Fix infinite loop in slurmctld if GRES is specified without a count.
-- sacct: Print error when unknown arguments are found.
-- Fix checking missing return codes when unpacking structures.
-- Fix slurm.spec-legacy including slurmsmwd
-- More explicit error message when cgroup oom-kill events detected.
-- When updating an association and are unable to find parent association
initialize old fairshare association pointer correctly.
-- Wrap slurm_cond_signal() calls with mutexes where needed.
-- Fix correct timeout with resends in slurm_send_only_node_msg.
-- Fix pam_slurm_adopt to honor action_adopt_failure.
-- Have the slurmd recreate the hwloc xml file for the full system on restart.
-- sdiag - correct the units for the gettimeofday() stat to microseconds.
-- Set SLURM_CLUSTER_NAME environment variable in MailProg to the ClusterName.
-- smail - use SLURM_CLUSTER_NAME environment variable.
-- job_submit/lua - expose argc/argv options through lua interface.
-- slurmdbd - prevent false-positive warning about innodb settings having
been set too low if they're actually set over 2GB.
* Changes in Slurm 18.08.0
==========================
-- Fix segfault on job arrays when starting controller without dbd up.
-- Fix pmi2 to build with gcc 8.0+.
-- Remove the development snapshot of select/cons_tres plugin.
-- Fix slurmd -C to not print benign error from xcpuinfo.
-- Fix potential double locks in the assoc_mgr.
-- Fix sacct truncate flag behavior Truncated pending jobs will always
return a start and end time set to the window end time, so elapsed
time is 0.
-- Fix extern step hanging forever when canceled right after creation.
-- sdiag - add slurmctld agent count.
-- Remove requirement to have cgroup_allowed_devices_file.conf in order to
constrain devices. By default all devices are allowed and GRES, that are
associated with a device file, that are not requested are restricted.
-- Fix proper alignment of clauses when determining if more nodes are needed
for an allocation.
-- Fix race condition when canceling a federation job that just started
running.
-- Prevent extra resources from being allocated when combining certain flags.
-- Fix problem in task/affinity plugin that can lead to slurmd fatal()'ing
when using --hint=nomultithread.
-- Fix left over socket file when step is ending and using pmi2 with
%n or %h in the spool dir.
-- Don't remove hwloc full system xml file when shutting down the slurmd.
-- Fix segfault that could happen with a het job when it was canceled while
starting.
-- Fix scan-build false-positive warning about invalid memory access in the
_ping_controller() function.
-- Add control_inx value to trigger_info_msg_t to permit future work in the
trigger management code to distinguish which of multiple backup controllers
has changed state.
* Changes in Slurm 18.08.0rc1
==============================
-- Add TimelimitRaw sacct output field to display timelimit numbers.
-- Fix job array preemption during backfill scheduling.
-- Fix scontrol -o show assoc output.
-- Add support for sacct --whole-hetjob=[yes|no] option.
-- Make salloc handle node requests the same as sbatch.
-- Add shutdown_on_reboot SlurmdParameter to control whether the Slurmd will
shutdown itself down or not when a reboot request is received.
-- Add cancel_reboot scontrol option to cancel pending reboot of nodes.
-- Make Users case insensitive in the database based on
Parameters=PreserveCaseUser in the slurmdbd.conf.
-- Improve scheduling when dealing with node_features that could have a
boot delay.
-- Fix issue if a step launch fails we don't get a bunch of '(null)' strings
in the step record for usage.
-- Changed the default AuthType for slurmdbd to auth/munge.
-- Make it so libpmi.so doesn't link to libslurm.so.$apiversion.
-- Added 'remote-fs.target' to After directive of slurmd.service file.
-- Fix filetxt plugin to handle it when you aren't running a jobacct_gather
plugin.
-- Remove drain on node when reboot nextstate used.
-- Speed up pack of job's qos.
-- Fix race condition when trying to update reservation in the database.
-- For the PrologFlags slurm.conf option, make NoHold mutually exclusive with
Contain and/or X11 options.
-- Revise the handling of SlurmctldSyslogLevel and SlurmdSyslogLevel options
in slurm.conf and DebugLevelSyslog in slurmdbd.conf.
-- Gate reading the cgroup.conf file.
-- Gate reading the acct_gather_* plugins.
-- Add sacctmgr options to prevent/manage job queue stuffing:
- GrpJobsAccrue=<max_jobs>
Maximum number of pending jobs in aggregate able to accrue age priority
for this association and all associations which are children of this
association. To clear a previously set value use the modify command with
a new value of -1.
- MaxJobsAccrue=<max_jobs>
Maximum number of pending jobs able to accrue age priority at any given
time for the given association. This is overridden if set directly on a
user. Default is the cluster's limit. To clear a previously set value use
the modify command with a new value of -1.
- MinPrioThreshold
Minimum priority required to reserve resources when scheduling.
* 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=...". NOTE: These
options are for future use and currently have no effect.
-- 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.
-- Disable local PTY output processing when using 'srun --unbuffered'. This
prevents the PTY subsystem from inserting extraneous \r characters into
the output stream.
-- Change the column name for the %U (User ID) field in squeue to 'UID'.
-- CRAY - Add CheckGhalQuiesce to the CommunicationParameters.
-- When a process is core dumping, avoid terminating other processes in that
task group. This fixes a problem with writing out incomplete OpenMP core
files.
-- CPU frequency management enhancements: If scaling_available_frequencies
file is not available, then derive values from scaling_min_freq and
scaling_max_freq values. If cpuinfo_cur_freq file is not available then
try to use scaling_cur_freq.
-- Add pending jobs count to sdiag output.
-- Fix update job function. There were some incosistencies on the behavior
that caused time limits to be modified when swapping QOS, bad permissions
check for a coordinator and AllowQOS and DenyQOS were not enforced on
job update.
-- Add configuration paramerers SlurmctldPrimaryOnProg and
SlurmctldPrimaryOffProg, which define programs to execute when a slurmctld
daemon becomes the primary server or goes from primary to backup mode.
-- Add configuration paramerers SlurmctldAddr for use with virtual IP to manage
backup slurmctld daemons.
-- Explicitly shutdown the slurmd process when instructed to reboot.
-- Add ability to create/update partition with TRESBillingWeights through
scontrol.
-- Calcuate TRES billing values at submission so that billing limits can be
enforced at submission with QOS DenyOnLimit.
-- Add node_features plugin function "node_features_p_reboot_weight()" to
return the node weight to be used for a compute node that requires reboot
for use (e.g. to change the NUMA mode of a KNL node).
-- Add NodeRebootWeight parameter to knl.conf configuration file.
-- Fix insecure handling of job requested gid field. CVE-2018-10995.
-- Fix srun to return highest signal of any task.
-- Completely remove "gres" field from step record. Use "tres_per_node",
"tres_per_socket", etc.
-- Add "Links" parameter to gres.conf configuration file.
-- Force slurm_mktime() to set tm_isdst to -1 so anyone using the function
doesn't forget to set it.
-- burst_buffer.conf - Add SetExecHost flag to enable burst buffer access
from the login node for interactive jobs.
-- Append ", with requeued tasks" to job array "end" emails if any tasks in the
array were requeued. This is a hint to use "sacct --duplicates" to see the
whole picture of the array job.
-- Add ResumeFailProgram slurm.conf option to specify a program that is called
when a node fails to respond by ResumeTimeout.
-- Add new job pending reason of "ReqNodeNotAvail, reserved for maintenance".
-- Remove AdminComment += syntax from 'scontrol update job'.
-- sched/backfill: Reset job time limit if needed for deadline scheduling.
-- For heterogeneous job component with required nodes, explicitly exclude
those nodes from all other job components.
-- Add name of partition used to output of srun --test-only output (valuable
for jobs submitted to multiple partitions).
-- If MailProg is not configured and "/bin/mail" (the default) does not exist,
but "/usr/bin/mail" does exist then use "/usr/bin/mail" as a default value.
-- sdiag output now reports outgoing slurmctld message queue contents.
-- Fix issue in performance when reading slurm conf having nodes with features.
-- Make it so the slurmdbd's pid file gets created before initing
the database.
-- Improve escaping special characters on user commands when specifying paths.
-- Fix directory names with special char '\' that are not handled correctly.
-- Add salloc/sbatch/srun option of --gres-flags=disable-binding to disable
filtering of CPUs with respect to generic resource locality. This option is
currently required to use more CPUs than are bound to a GRES (i.e. if a GPU
is bound to the CPUs on one socket, but resources on more than one socket
are required to run the job). This option may permit a job to be allocated
resources sooner than otherwise possible, but may result in lower job
performance.
-- SlurmDBD - Print warning if MySQL/MariaDB internal tuning is not at least
half of the recommended values.
-- Move libpmi from src/api to contribs/pmi.
-- Add ability to specify a node reason when rebooting nodes with "scontrol
reboot".
-- Add nextstate option to "scontrol reboot" to dictate state of node after
reboot.
-- Consider "resuming" (nextstate=resume) nodes as available in backfill
future scheduling and don't replace "resuming" nodes in reservations.
-- Add the use of a xml file to help performance when using hwloc.
* 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 17.11.11
===========================
-- Correctly initialize variable in env_array_user_default().
* Changes in Slurm 17.11.10
===========================
-- Move priority_sort_part_tier from slurmctld to libslurm to make it possible
to run the regression tests 24.* without changing that code since it links
directly to the priority plugin where that function isn't defined.
-- Fix issue where job time limits can increase to max walltime when updating
a job with scontrol.
-- Fix invalid protocol_version manipulation on big endian platforms causing
srun and sattach to fail.
-- Fix for QOS, Reservation and Alias env variables in srun.
-- mpi/pmi2 - Backport 6a702158b49c4 from 18.08 to avoid dangerous detached
thread.
-- When allowing heterogeneous steps make sure we copy all the options to
avoid copying strings that may be overwritten.
-- Print correctly when sh5util finds and empty file.
-- Fix sh5util to not seg fault on exit.
-- Fix sh5util to check correctly for H5free_memory.
-- Adjust OOM monitoring function in task/cgroup to prevent problems in
regression suite from leaked file descriptors.
-- Fix issue with gres when defined with a type and no count
(i.e. gres=gpu/tesla) it would get a count of 0.
-- Allow sstat to talk to slurmd's that are new in protocol version.
-- Permit database names over 33 characters in accounting_storage/mysql.
-- Fix negative values when profiling.
-- Fix srun segfault caused by invalid memory reads on the env.
-- Fix segfault on job arrays when starting controller without dbd up.
-- Fix pmi2 to build with gcc 8.0+.
-- Fix proper alignment of clauses when determining if more nodes are needed
for an allocation.
-- Fix race condition when canceling a federation job that just started
running.
-- Prevent extra resources from being allocated when combining certain flags.
-- Fix problem in task/affinity plugin that can lead to slurmd fatal()'ing
when using --hint=nomultithread.
-- Fix left over socket file when step is ending and using pmi2 with
%n or %h in the spool dir.
-- Fix incorrect spacing for PartitionName lines in 'scontrol write config'.
-- Fix sacct to not print huge reserve times when the job was never eligible.
-- burst_buffer/cray - Add missing locks around assoc_mgr when timing out a
burst buffer.
-- burst_buffer/cray - Update burst buffers when an association or qos
is removed from the system.
-- If failed over to a backup controller, ensure the agent thread is launched
to handle deferred tasks.
-- Fix correct job CPU count allocated.
-- Protect against sending to the slurmdbd if the connection has gone away.
-- Fix checking missing return codes when unpacking structures.
-- Fix slurm.spec-legacy including slurmsmwd
-- More explicit error message when cgroup oom-kill events detected.
-- When updating an association and are unable to find parent association
initialize old fairshare association pointer correctly.
-- Wrap slurm_cond_signal() calls with mutexes where needed.
-- Fix correct timeout with resends in slurm_send_only_node_msg.
-- Fix pam_slurm_adopt to honor action_adopt_failure.
-- job_submit/lua - expose argc/argv options through lua interface.
* Changes in Slurm 17.11.9-2
============================
-- Fix printing of node state "drain + reboot" (and other node state flags).
-- Fix invalid read (segfault) when sorting multi-partition jobs.
-- Move several new error() messages to debug() to keep them out of users'
srun output.
* Changes in Slurm 17.11.9
==========================
-- Fix segfault in slurmctld when a job's node bitmap is NULL during a
scheduling cycle. Primarily caused by EnforcePartLimits=ALL.
-- Remove erroneous unlock in acct_gather_energy/ipmi.
-- Enable support for hwloc version 2.0.1.
-- Fix 'srun -q' (--qos) option handling.
-- Fix socket communication issue that can lead to lost task completition
messages, which will cause a permanently stuck srun process.
-- Handle creation of TMPDIR if environment variable is set or changed in
a task prolog script.
-- Avoid node layout fragmentation if running with a fixed CPU count but
without Sockets and CoresPerSocket defined.
-- burst_buffer/cray - Fix datawarp swap default pool overriding jobdw.
-- Fix incorrect job priority assignment for multi-partition job with
different PriorityTier settings on the partitions.
-- Fix sinfo to print correct node state.
* Changes in Slurm 17.11.8
==========================
-- Fix incomplete RESPONSE_[RESOURCE|JOB_PACK]_ALLOCATION building path.
-- Do not allocate nodes that were marked down due to the node not responding
by ResumeTimeout.
-- task/cray plugin - search for "mems" cgroup information in the file
"cpuset.mems" then fall back to the file "mems".
-- Fix ipmi profile debug uninitialized variable.
-- Improve detection of Lua package on older RHEL distributions.
-- PMIx: fixed the direct connect inline msg sending.
-- MYSQL: Fix issue not handling all fields when loading an archive dump.
-- Allow a job_submit plugin to change the admin_comment field during
job_submit_plugin_modify().
-- job_submit/lua - fix access into reservation table.
-- MySQL - Prevent deadlock caused by archive logic locking reads.
-- Don't enforce MaxQueryTimeRange when requesting specific jobs.
-- Modify --test-only logic to properly support jobs submitted to more than
one partition.
-- Prevent slurmctld from abort when attempting to set non-existing
qos as def_qos_id.
-- Add new job dependency type of "afterburstbuffer". The pending job will be
delayed until the first job completes execution and it's burst buffer
stage-out is completed.
-- Reorder proctrack/task plugin load in the slurmstepd to match that of slurmd
and avoid race condition calling task before proctrack can introduce.
-- Prevent reboot of a busy KNL node when requesting inactive features.
-- Revert to previous behavior when requesting memory per cpu/node introduced
in 17.11.7.
-- Fix to reinitialize previously adjusted job members to their original value
when validating the job memory in multi-partition requests.
-- Fix _step_signal() from always returning SLURM_SUCCESS.
-- Combine active and available node feature change logs on one line rather
than one line per node for performance reasons.
-- Prevent occasionally leaking freezer cgroups.
-- Fix potential segfault when closing the mpi/pmi2 plugin.
-- Fix issues with --exclusive=[user|mcs] to work correctly
with preemption or when job requests a specific list of hosts.
-- Make code compile with hdf5 1.10.2+
-- mpi/pmix: Fixed the collectives canceling.
-- SlurmDBD: improve error message handling on archive load failure.
-- Fix incorrect locking when deleting reservations.
-- Fix incorrect locking when setting up the power save module.
-- Fix setting format output length for squeue when showing array jobs.
-- Add xstrstr function.
-- Fix printing out of --hint options in sbatch, salloc --help.
-- Prevent possible divide by zero in _validate_time_limit().
-- Add Delegate=yes to the slurmd.service file to prevent systemd from
interfering with the jobs' cgroup hierarchies.
-- Change the backlog argument to the listen() syscall within srun to 4096
to match elsewhere in the code, and avoid communication problems at scale.
* Changes in Slurm 17.11.7
==========================
-- Fix for possible slurmctld daemon abort with NULL pointer.
-- Fix different issues when requesting memory per cpu/node.
-- PMIx - override default paths at configure time if --with-pmix is used.
-- Have sprio display jobs before eligible time when
PriorityFlags=ACCRUE_ALWAYS is set.
-- Make sure locks are always in place when calling _post_qos_list().
-- Notify srun and ctld when unkillable stepd exits.
-- Fix slurmstepd deadlock in stepd cleanup caused by race condition in
the jobacct_gather fini() interfaces introduced in 17.11.6.
-- Fix slurmstepd deadlock in PMIx startup.
-- task/cgroup - fix invalid free() if the hwloc library does not return a
string as expected.
-- Fix insecure handling of job requested gid field. CVE-2018-10995.
-- Add --without x11 option to rpmbuild in slurm.spec.
* Changes in Slurm 17.11.6
==========================
-- CRAY - Add slurmsmwd to the contribs/cray dir.
-- sview - fix crash when closing any search dialog.
-- Fix initialization of variable in stepd when using native x11.
-- Fix reading slurm_io_init_msg to handle partial messages.
-- Fix scontrol create res segfault when wrong user/account parameters given.
-- Fix documentation for sacct on parameter -X (--allocations)
-- Change TRES Weights debug messages to debug3.
-- FreeBSD - assorted fixes to restore build.
-- Fix for not tracking environment variables from unrelated different jobs.
-- PMIX - Added the direct connect authentication.
When upgrading this may cause issues with jobs using pmix starting on mixed
slurmstepd versions where some are less than 17.11.6.
-- Prevent the backup slurmctld from losing the active/available node
features list on takeover.
-- Add documentation for fix IDLE*+POWER due to capmc stuck in Cray systems.
-- Fix missing mutex unlock when prolog is failing on a node, leading to a
hung slurmd.
-- Fix locking around Cray CCM prolog/epilog.
-- Add missing fed_mgr read locks.
-- Fix issue incorrectly setting a job time_start to 0 while requeueing.
-- smail - remove stray '-s' from mail subject line.
-- srun - prevent segfault if ClusterName setting is unset but
SLURM_WORKING_CLUSTER environment variable is defined.
-- In configurator.html web pages change default configuration from
task/none to task/affinity plugin and from select/linear plugin to
select/cons_res plus CR_Core.
-- Allow jobs to run beyond a FLEX reservation end time.
-- Fix problem with wrongly set as Reservation job state_reason.
-- Prevent bit_ffs() from returnig value out of bitmap range.
-- Improve performance of 'squeue -u' when PrivateData=jobs is enabled.
-- Make UnavailableNodes value in job reason be correct for each job.
-- Fix 'squeue -o %s' on Cray systems.
-- Fix incorrect error thrown when cancelling part of a job array.
-- Fix error code and scheduling problem for --exclusive=[user|mcs].
-- Fix build when lz4 is in a non-standard location.
-- Be able to force power_down of cloud node even if in power_save state.
-- Allow cloud nodes to be recognized in Slurm when booted out of band.
-- Fixes race condition in _pack_job_gres() when is called multiple times.
-- Increase duration of "sleep" command used to keep extern step alive.
-- Remove unsafe usage of pthread_cancel in slurmstepd that can lead to
to deadlock in glibc.
-- Fix total TRES Billing on partitions.
-- Don't tear down a BB if a node fails and --no-kill or resize of a job
happens.
-- Remove unsafe usage of pthread_cancel in pmix plugin that can lead to
to deadlock in glibc.
-- Fix fatal in controller when loading completed trigger
-- Ignore reservation overlap at submission time.
-- GRES type model and QOS limits documentation added
-- slurmd - fix ABRT on SIGINT after reconfigure with MemSpecLimit set.
-- PMIx - move two error messages on retry to debug level, and only display
the error after the retry count has been exceeded.
-- Increase number of tries when sending responses to srun.
-- Fix checkpointing requeued/completing jobs in a bad state which caused a
segfault on restart.
-- Fix srun on ppc64 platforms.
-- Prevent slurmd from starting steps if the Prolog returns an error when using
PrologFlags=alloc.
-- priority/multifactor - prevent segfault running sprio if a partition has
just been deleted and PriorityFlags=CALCULATE_RUNNING is turned on.
-- job_submit/lua - add ESLURM_INVALID_TIME_LIMIT return code value.
-- job_submit/lua - print an error if the script calls log.user in
job_modify() instead of returning it to the next submitted job erroneously.
-- select/linear - handle job resize correctly.
-- select/cons_res - improve handling of --cores-per-socket requests.
* 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.
-- Soften messages about best_fit topology to debug2 to avoid alarm.
-- Fix issue in sreport reservation utilization report to handle more
allocated time than 100% (Flex reservations).
-- When a job is requesting a Flex reservation prefer the reservation's nodes
over any other nodes.
* 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 LaunchParameters=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