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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 16.05.2
==========================
-- CRAY - Fix issue where the proctrack plugin could hang if the container
id wasn't able to be made.
* Changes in Slurm 16.05.1
==========================
-- Fix __cplusplus macro in spank.h to allow compilation with C++.
-- Fix compile issue with older glibc < 2.12
-- Fix for starting batch step with mpi/pmix plugin.
-- Fix for "scontrol -dd show job" with respect to displaying the specific
CPUs allocated to a job on each node. Prior logic would only display
the CPU information for the first node in the job allocation.
-- Print correct return code on failure to update active node features
through sview.
Tim Wickberg
committed
-- Allow QOS timelimit to override partition timelimit when EnforcePartLimits
is set to all/any.
-- Make it so qsub will do a "basename" on a wrapped command for the output
and error files.
-- Fix issue where slurmd could core when running the ipmi energy plugin.
-- Add logic so that slurmstepd can be launched under valgrind.
-- Increase buffer size to read /proc/*/stat files.
-- Fix for tracking job resource allocation when slurmctld is reconfigured
while Cray Node Health Check (NHC) is running. Previous logic would fail to
record the job's allocation then perform release operation upon NHC
-- Make "scontrol show daemons" work with long node names.
-- CRAY - Collect energy using a uint64_t instead of uint32_t.
-- Fix incorrect if statements when determining if the user has a default
account or wckey.
-- Prevent job stuck in configuring state if slurmctld daemon restarted while
PrologSlurmctld is running. Also re-issue burst_buffer/pre-load operation
as needed.
-- Correct task affinity support for FreeBSD.
-- Fix for task affinity on KNL in SNC2/Flat mode.
-- Recalculate a job's memory allocation after node reboot if job requests all
of a node's memory and FastSchedule=0 is configured. Intel KNL memory size
can change on reboot with various MCDRAM modes.
-- Fix small memory leak when printing HealthCheckNodeState.
-- Eliminate memory leaks when AuthInfo is configured.
-- Cray/capmc_resume script modify a node's features (as needed) when the
reinit (reboot) command is issued rather than wait for the nodes to change
to the "on" state.
-- Correctly print ranges when using step values in job arrays.
-- Allow from file names / paths over 256 characters when launching steps,
as well as spaces in the executable name.
-- job_submit.license.lua example modified to send message back to user.
-- Document job --mem=0 option means all memory on a node.
-- Set SLURM_JOB_QOS environment variable to QOS name instead of description.
-- knl_cray.conf file option of CnselectPath added.
-- node_features/knl_cray plugin modified to get current node NUMA and MCDRAM
modes using cnselect command rather than capmc command.
-- liblua - add SLES12 paths to runtime search list.
-- Fix qsub default output and error files for task arrays.
-- Fix qsub to set job_name correctly when wrapping a script (-b y)
-- Cray - set EnforcePartLimits=any in slurm.conf template.
* Changes in Slurm 16.05.0
==========================
-- Update seff to fix warnings with ncpus, and list slurm-perlapi dependency
in spec file.
-- Fix testsuite to consistent use /usr/bin/env {bash,expect} construct.
-- Cray - Ensure that step completion messages get to the database.
-- Fix step cpus_per_task calculation for heterogeneous job allocation.
-- Fix --with-json= configure option to use specified path.
-- Add back thread_id to "thread_id" LogTimeFormat to distinguish between
mutliple threads with the same name. Now displays thread name and id.
-- Change how Slurm determines the NUMA count of a node. Ignore KNL NUMA
that only include memory.
-- Cray - Fix node list parsing in capmc_suspend/resume programs.
-- Fix sbatch #BSUB parsing for -W and -M options.
-- Fix GRES task layout bug that could cause slurmctld to abort.
-- Fix to --gres-flags=enforce-binding logic when multiple sockets needed.
-- Cray node shutdown/reboot scripts, perform operations on all nodes in one
capmc command. Only if that fails, issue the operations in parallel on
individual nodes. Required for scalability.
-- Cleanup two minor Coverity warnings.
-- Make it so the tres units in a job's formatted string are converted like
they are in a step.
-- Correct partition's MaxCPUsPerNode enforcement when nodes are shared by
multiple partitions.
-- node_feature/knl_cray - Prevent slurmctld GRES errors for "hbm" references.
-- Display thread name instead of thread id and remove process name in stderr
logging for "thread_id" LogTimeFormat.
-- Log IP address of bad incomming message to slurmctld.
-- If a user requests tasks, nodes and ntasks-per-node and
tasks-per-node/nodes != tasks print warning and ignore ntasks-per-node.
-- Release CPU "owner" file locks.
-- Fix for job step memory allocation: Reject invalid step at submit time
rather than leaving it queued.
-- Whenever possible, avoid allocating nodes that require a reboot.
-- Remove the SchedulerParameters option of "assoc_limit_continue", making it
the default value. Add option of "assoc_limit_stop". If "assoc_limit_stop"
is set and a job cannot start due to association limits, then do not attempt
to initiate any lower priority jobs in that partition. Setting this can
decrease system throughput and utlization, but avoid potentially starving
larger jobs by preventing them from launching indefinitely.
-- Update a node's socket and cores per socket counts as needed after a node
boot to reflect configuration changes which can occur on KNL processors.
Note that the node's total core count must not change, only the distribution
of cores across varying socket counts (KNL NUMA nodes treated as sockets by
Slurm).
-- Rename partition configuration from "Shared" to "OverSubscribe". Rename
salloc, sbatch, srun option from "--shared" to "--oversubscribe". The old
options will continue to function. Output field names also changed in
scontrol, sinfo, squeue and sview.
-- Add SLURM_UMASK environment variable to user job.
-- knl_conf: Added new configuration parameter of CapmcPollFreq.
-- squeue: remove errant spaces in column formats for "squeue -o %all".
-- Add ARRAY_TASKS mail option to send emails to each task in a job array.
-- Change default compression library for sbcast to lz4.
-- select/cray - Initiate step node health check at start of step termination
rather than after application completely ends so that NHC can capture
information about hung (non-killable) processes.
-- Add --units=[KMGTP] option to sacct to display values in specific unit type.
-- Modify sacct and sacctmgr to display TRES values in converted units.
-- Modify sacctmgr to accept TRES values with [KMGTP] suffixes.
-- Replace hash function with more modern SipHash functions.
-- Add "--with-cray_dir" build/configure option.
-- BB- Only send stage_out email when stage_out is set in script.
-- Add r/w locking to file_bcast receive functions in slurmd.
-- Add TopologyParam option of "TopoOptional" to optimize network topology
only for jobs requesting it.
-- Configuration parameter "CpuFreqDef" used to set default governor for job
step not specifying --cpu-freq (previously the parameter was unused).
-- Fix sshare -o<format> to correctly display new lengths.
-- Update documentation to rename Shared option to OverSubscribe.
-- Update documentation to rename partition Priority option to PriorityTier.
-- Prevent changing of QOS on running jobs.
-- Update accounting when changing QOS on pending jobs.
-- Add support to ntasks_per_socket in task/affinity.
-- Generate init.d and systemd service scripts in etc/ through Make rather
than at configure time to ensure all variable substitutions happen.
-- Use TaskPluginParam for default task binding if no user specified CPU
binding. User --cpu_bind option takes precident over default. No longer
any error if user --cpu_bind option does not match TaskPluginParam.
-- Make sacct and sattach work with older slurmd versions.
-- Fix protocol handling between 15.08 and 16.05 for 'scontrol show config'.
-- Enable prefixes (e.g. info, debug, etc.) in slurmstepd debugging.
* Changes in Slurm 16.05.0pre2
==============================
-- Split partition's "Priority" field into "PriorityTier" (used to order
partitions for scheduling and preemption) plus "PriorityJobFactor" (used by
priority/multifactor plugin in calculating job priority, which is used to
order jobs within a partition for scheduling).
-- Revert call to getaddrinfo, restoring gethostbyaddr (introduced in Slurm
16.05.0pre1) which was failing on some systems.
-- knl_cray.conf - Added AllowMCDRAM, AllowNUMA and ALlowUserBoot
configuration options.
-- Add node_features_p_user_update() function to node_features plugin.
-- Don't print Weight=1 lines in 'scontrol write config' (its the default).
-- Remove PARAMS macro from slurm.h.
-- Remove BEGIN_C_DECLS and END_C_DECLS macros.
-- Check that PowerSave mode configured for node_features/knl_cray plugin.
It is required to reconfigure and reboot nodes.
-- Update documentation to reflect new cgroup default location change from
/cgroup to /sys/fs/cgroup.
-- If NodeHealthCheckProgram configured HealthCheckInterval is non-zero, then
modify slurmd to run it before registering with slurmctld.
-- Fix for tasks being packed onto cores when the requested --cpus-per-task is
greater than the number of threads on a core and --ntasks-per-core is 1.
-- Make it so jobs/steps track ':' named gres/tres, before hand gres/gpu:tesla
would only track gres/gpu, now it will track both gres/gpu and
gres/gpu:tesla as separate gres if configured like
AccountingStorageTRES=gres/gpu,gres/gpu:tesla
-- Added new job dependency type of "aftercorr" which will start a task of a
job array after the corresponding task of another job array completes.
-- Increase default MaxTasksPerNode configuration parameter from 128 to 512.
-- Enable sbcast data compression logic (compress option previously ignored).
-- Add --compress option to srun command for use with --bcast option.
-- Add TCPTimeout option to slurm[dbd].conf. Decouples MessageTimeout from TCP
connections.
-- Don't call primary controller for every RPC when backup is in control.
-- Add --gres-flags=enforce-binding option to salloc, sbatch and srun commands.
If set, the only CPUs available to the job will be those bound to the
selected GRES (i.e. the CPUs identifed in the gres.conf file will be
strictly enforced rather than advisory).
-- Change how a node's allocated CPU count is calculated to avoid double
counting CPUs allocated to multiple jobs at the same time.
-- Added SchedulingParameters option of "bf_min_prio_reserve". Jobs below
the specified threshold will not have resources reserved for them.
-- Added "sacctmgr show lostjobs" to report any orphaned jobs in the database.
-- When a stepd is about to shutdown and send it's response to srun
make the wait to return data only hit after 500 nodes and configurable
based on the TcpTimeout value.
-- Add functionality to reset the lft and rgt values of the association table
with the slurmdbd.
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