NEWS

    scheduling with respect to node reboots.
 -- Avoid allocating resources to a job in the event that its run time plus boot
    time (if needed) extent into an advanced reservation.
 -- Burst_buffer/cray - Avoid stage-out operation if job never started.
 -- node_features/knl_cray - Add capability to detected Uncorrectable Memory
    Errors (UME) and if detected then log the event in all job and step stderr
    with a message of the form:
    error: *** STEP 1.2 ON tux1 UNCORRECTABLE MEMORY ERROR AT 2016-12-14T09:09:37 ***
    Similar logic added to node_features/knl_generic in version 17.02.0pre4.
 -- If job is allocated nodes which are powered down, then reset job start time
    when the nodes are ready and do not charge the job for power up time.
 -- Add the ability to purge transactions from the database.
 -- Add support for requeue'ing of federated jobs (BETA).
 -- Add support for interactive federated jobs (BETA).
 -- Add the ability to purge rolled up usage from the database.
 -- Properly set SLURM_JOB_GPUS environment variable for Prolog.

* Changes in Slurm 17.02.0pre4
==============================
 -- Add support for per-partitiion OverTimeLimit configuration.
 -- Add --mem_bind option of "sort" to run zonesort on KNL nodes at step start.
 -- Add LaunchParameters=mem_sort option to configure running of zonesort
    by default at step startup.
 -- Add "FreeSpace" information for each pool to the "scontrol show burstbuffer"
    output. Required changes to the burst_buffer_info_t data structure.
 -- Add new node state flag of NODE_STATE_REBOOT for node reboots triggered by
    "scontrol reboot" commands. Previous logic re-used NODE_STATE_MAINT flag,
    which could lead to inconsistencies. Add "ASAP" option to "scontrol reboot"
    command that will drain a node in order to reboot it as soon as possible,
    then return it to service.
 -- Allow unit conversion routine to convert 1024M to 1G.
 -- switch/cray plugin - change legacy spool directory location.
 -- Add new PriorityFlags option of INCR_ONLY, which prevents a job's priority
    from being decremented.
 -- Make it so we don't purge job start messages until after we purge step
    messages.  Hopefully this will reduce the number of messages lost when
    filling up memory when the database/DBD is down.
 -- Added SchedulingParameters option of "bf_job_part_count_reserve". Jobs below
    the specified threshold will not have resources reserved for them.
 -- If GRES are configured with file IDs, then "scontrol -d show node" will
    not only identify the count of currently allocated GRES, but their specific
    index numbers (e.g. "GresUsed=gpu:alpha:2(IDX:0,2),gpu:beta:0(IDX:N/A)").
    Ditto for job information with "scontrol -d show job".
 -- Add new mcs/account plugin.
 -- Add "GresEnforceBind=Yes" to "scontrol show job" output if so configured.
 -- Add support for SALLOC_CONSTRAINT, SBATCH_CONSTRAINT and SLURM_CONSTRAINT
    environment variables to set default constraints for salloc, sbatch and
    srun commands respectively.
 -- Provide limited support for the MemSpecLimit configuration parameter without
    the task/cgroup plugin.
 -- node_features/knl_generic - Add capability to detected Uncorrectable Memory
    Errors (UME) and if detected then log the event in all job and step stderr
    with a message of the form:
    error: *** STEP 1.2 ON tux1 UNCORRECTABLE MEMORY ERROR AT 2016-12-14T09:09:37 ***
 -- Add SLURM_JOB_GID to TaskProlog environment.
 -- burst_buffer/cray - Remove leading zeros from node ID lists passed to
    dw_wlm_cli program.
 -- Add "Partitions" field to "scontrol show node" output.
 -- Remove sched/wiki and sched/wiki2 plugins and associated code.
 -- Remove SchedulerRootFilter option and slurm_get_root_filter() API call.
 -- Add SchedulerParameters option of spec_cores_first to select specialized
    cores from the lowest rather than highest number cores and sockets.
 -- Add PrologFlags option of Serial to disable concurrent launch of
    Prolog and Epilog scripts.
 -- Fix security issue caused by insecure file path handling triggered by the
    failure of a Prolog script. To exploit this a user needs to anticipate or
    cause the Prolog to fail for their job. CVE-2016-10030.

* Changes in Slurm 17.02.0pre3
==============================
 -- Add srun host & PID to job step data structures.
 -- Avoid creating duplicate pending step records for the same srun command.
 -- Rewrite srun's logic for pending steps for better efficiency (fewer RPCs).
 -- Added new SchedulerParameters options step_retry_count and step_retry_time
    to control scheduling behaviour of job steps waiting for resources.
 -- Optimize resource allocation logic for --spread-job job option.
 -- Modify cpu_bind and mem_bind map and mask options to accept a repetition
    count to better support large task count. For example:
    "mask_mem:0x0f*2,0xf0*2" is equivalent to "mask_mem:0x0f,0x0f,0xf0,0xf0".
 -- Add support for --mem_bind=prefer option to prefer, but not restrict memory
    use to the identified NUMA node.
 -- Add mechanism to constrain kernel memory allocation using cgroups. New
    cgroup.conf parameters added: ConstrainKmemSpace, MaxKmemPercent, and
    MinKmemSpace.
 -- Correct invokation of man2html, which previously could cause FreeBSD builds
    to hang.
 -- MYSQL - Unconditionally remove 'ignore' clause from 'alter ignore'.
 -- Modify service files to not start Slurm daemons until after Munge has been
    started.
    NOTE: If you are not using Munge, but are using the "service" scripts to
    start Slurm daemons, then you will need to remove this check from the
    etc/slurm*service scripts.
 -- Do not process SALLOC_HINT, SBATCH_HINT or SLURM_HINT environment variables
    if any of the following salloc, sbatch or srun command line options are
    specified: -B, --cpu_bind, --hint, --ntasks-per-core, or --threads-per-core.
 -- burst_buffer/cray: Accept new jobs on backup slurmctld daemon without access
    to dw_wlm_cli command. No burst buffer actions will take place.
 -- Do not include SLURM_JOB_DERIVED_EC, SLURM_JOB_EXIT_CODE, or
    SLURM_JOB_EXIT_CODE in PrologSlurmctld environment (not available yet).
 -- Cray - set task plugin to fatal() if task/cgroup is not loaded after
    task/cray in the TaskPlugin settings.
 -- Remove separate slurm_blcr package. If Slurm is built with BLCR support,
    the files will now be part of the main Slurm packages.
 -- Replace sjstat, seff and sjobexit RPM packages with a single "contribs"
    package.
 -- Remove long since defunct slurmdb-direct scripts.
 -- Add SbcastParameters configuration option to control default file
    destination directory and compression algorithm.
 -- Add new SchedulerParameter (max_array_tasks) to limit the maximum number of
    tasks in a job array independently from the maximum task ID (MaxArraySize).
 -- Fix issue where number of nodes is not properly allocated when sbatch and
    salloc are requested with -n tasks < hosts from -w hostlist or from -N.
 -- Add infrastructure for submitting federated jobs.

* Changes in Slurm 17.02.0pre2
==============================
 -- Add new RPC (REQUEST_EVENT_LOG) so that slurmd and slurmstepd can log events
    through the slurmctld daemon.
 -- Remove sbatch --bb option. That option was never supported.
 -- Automatically clean up task/cgroup cpuset and devices cgroups after steps
    are completed.
 -- Add federation read/write locks.
 -- Limit job purge run time to 1 second at a time.
 -- The database index for jobs is now 64 bits.  If you happen to be close to
    4 billion jobs in your database you will want to update your slurmctld at
    the same time as your slurmdbd to prevent roll over of this variable as
    it is 32 bit previous versions of Slurm.
 -- Optionally lock slurmstepd in memory for performance reasons and to avoid
    possible SIGBUS if the daemon is paged out at the time of a Slurm upgrade
    (changing plugins). Controlled via new LaunchParameters options of
    slurmstepd_memlock and slurmstepd_memlock_all.
 -- Add event trigger on burst buffer errors (see strigger man page,
    --burst_buffer option).
 -- Add job AdminComment field which can only be set by a Slurm administrator.
 -- Add salloc, sbatch and srun option of --delay-boot=<time>, which will
    temporarily delay booting nodes into the desired state for a job in the
    hope of using nodes already in the proper state which will be available at
    a later time.
 -- Add job burst_buffer_state and delay_boot fields to scontrol and squeue
    output. Also add ability to modify delay_boot from scontrol.
 -- Fix for node's available TRES array getting filled in with configured GRES
    model types.
 -- Log if job --bb option contains any unrecognized content.
 -- Display configured and allocated TRES for nodes in scontrol show nodes.
 -- Change all memory values (in MB) to uint64_t to accommodate > 2TB per node.
 -- Add MailDomain configuration parameter to qualify email addresses.
 -- Refactor the persistent connections within the federation code to use
    the same logic that was found in the slurmdbd.  Now both functionalities
    share the same code.
 -- Remove BlueGene/L and BlueGene/P support.
 -- Add "flag" field to launch_tasks_request_msg. Remove the following fields
    (moved into flags): multi_prog, task_flags, user_managed_io, pty,
    buffered_stdio, and labelio.
 -- Add protocol version to slurmd startup communications for slurmstepd to
    permit changes in the protocol.

* Changes in Slurm 17.02.0pre1
==============================
 -- burst_buffer/cray - Add support for rounding up the size of a buffer reqeust
    if the DataWarp configuration "equalize_fragments" is used.
 -- Remove AIX support.
 -- Rename "in" to "input" in slurm_step_io_fds data structure defined in
    slurm.h. This is needed to avoid breaking Python with by using one of its
    keywords in a Slurm data structure.
 -- Remove eligible_time from jobcomp/elasticsearch.
 -- Enable the deletion of a QOS, even if no clusters have been added to the
    database.
 -- SlurmDBD - change all timestamps to bigint from int to solve Y2038 problem.
 -- Add salloc/sbatch/srun --spread-job option to distribute tasks over as many
    nodes as possible. This also treats the --ntasks-per-node option as a
    maximum value.
 -- Add ConstrainKmemSpace to cgroup.conf, defaulting to yes, to allow
    cgroup Kmem enforcement to be disabled while still using ConstrainRAMSpace.
 -- Add support for sbatch --bbf option to specify a burst buffer input file.
 -- Added burst buffer support for job arrays. Add new SchedulerParameters
    configuration parameter of bb_array_stage_cnt=# to indicate how many pending
    tasks of a job array should be made available for burst buffer resource
    allocation.
 -- Fix small memory leak when a job fails to load from state save.
 -- Fix invalid read when attempting to delete clusters from database with
    running jobs.
 -- Fix small memory leak when deleting clusters from database.
 -- Add SLURM_ARRAY_TASK_COUNT environment variable. Total number of tasks in a
    job array (e.g. "--array=2,4,8" will set SLURM_ARRAY_TASK_COUNT=3).
 -- Add new sacctmgr commands: "shutdown" (shutdown the server), "list stats"
    (get server statistics) "clear stats" (clear server statistics).
 -- Restructure job accounting query to use 'id_job in (1, 2, .. )' format
    instead of logically equivalent 'id_job = 1 || id_job = 2 || ..' .
 -- Added start_delay field to jobcomp/elasticsearch.
 -- In order to support federated jobs, the MaxJobID configuration parameter
    default value has been reduced from 2,147,418,112 to 67,043,328 and its
    maximum value is now 67,108,863. Upon upgrading, any pre-existing jobs that
    have a job ID above the new range will continue to run and new jobs will get
    job IDs in the new range.
 -- Added infrastructure for setting up federations in database and establishing
    connections between federation clusters.

* Changes in Slurm 16.05.12
===========================

* Changes in Slurm 16.05.11
===========================
 -- burst_buffer/cray - Add support for line continuation.
 -- If a job is cancelled by the user while it's allocated nodes are being
    reconfigured (i.e. the capmc_resume program is rebooting nodes for the job)
    and the node reconfiguration fails (i.e. the reboot fails), then don't
    requeue the job but leave it in a cancelled state.
 -- capmc_resume (Cray resume node script) - Do not disable changing a node's
    active features if SyscfgPath is configured in the knl.conf file.
 -- Fix memory error when updating a job's licenses.
 -- Fix double read lock of tres when updating gres or licenses on a job.
 -- Fix regression in 16.05.10 with respects to GrpTresMins on a QOS or
    Association.
 -- ALPS - Fix scheduling when ALPS doesn't agree with Slurm on what nodes
    are free.
 -- Fix seg fault if loading attempting to load non-existent burstbuffer plugin.
 -- Fix to backfill scheduling with respect to QOS and association limits. Jobs
    submitted to multiple partitions are most likley to be effected.
 -- Avoid erroneous errno set by the mariadb 10.2 api.
 -- Fix security issue in Prolog and Epilog by always prepending SPANK_ to
    all user-set environment variables. CVE-2017-15566.

* Changes in Slurm 16.05.10-2
=============================
 -- Replace clock_gettime with time(NULL) for very old systems without the call.

* Changes in Slurm 16.05.10
===========================
 -- Record job state as PREEMPTED instead of TIMEOUT when GraceTime is reached.
 -- task/cgroup - print warnings to stderr when --cpu_bind=verbose is enabled
    and the requested processor affinity cannot be set.
 -- power/cray - Disable power cap get and set operations on DOWN nodes.
 -- Jobs preempted with PreemptMode=REQUEUE were incorrectly recorded as
    REQUEUED in the accounting.
 -- PMIX - Use volatile specifier to avoid flag caching and lock the flag to
    make sure it is protected.
 -- PMIX/PMI2 - Make it possible to use %n or %h in a spool dir.
 -- burst_buffer/cray - Support default pool which is not the first pool
    reported by DataWarp and log in Slurm when pools that are added or removed
    from DataWarp.
 -- Insure job does not start running before PrologSlurmctld is complete and
    node is booted (all nodes for interactive job, at least first node for batch
    job without burst buffers).
 -- Fix minor memory leak in the slurmctld when removing a QOS.
 -- burst_buffer/cray - Do not execute "pre_run" operation until after all nodes
    are booted and ready for use.
 -- scontrol - return an error when attempting to use the +=/-+ syntax to
    update a field where this is not appropriate.
 -- Fix task/affinity to work correctly with --ntasks-per-socket.
 -- Honor --ntasks-per-node and --ntasks option when used with job constraints
    that contain node counts.
 -- Prevent deadlocked slurmstepd processes due to unsafe use of regcomp with
    older glibc versions.
 -- Fix squeue when SLURM_BITSTR_LEN=0 is set in the user environment.
 -- Fix comments in acct_policy.c to reflect actual variables instead of
    old ones.
 -- Fix correct variables when validating GrpTresMins on a QOS.
 -- Better debug output when a job is being held because of a GrpTRES[Run]Min
    limits.
 -- Fix correct state reason when job can't run 'safely' because of an
    association GrpWall limit.
 -- Squeue always loads new data if user_id option specified
 -- Fix for possible job ID parsing failure and abort.
 -- If node boot in progress when slurmctld daemon is restarted, then allow
    sufficient time for reboot to complete and not prematurely DOWN the node as
    "Not responding".
 -- For job resize, correct logic to build "resize" script with new values.
    Previously the scripts were based upon the original job size.
 -- Fix squeue to not limit the size of partition, burst_buffer, exec_host, or
    reason to 32 chars.
 -- Fix potential packing error when packing a NULL slurmdb_clus_res_rec_t.
 -- Fix potential packing errors when packing a NULL slurmdb_reservation_cond_t.
 -- Burst_buffer/cray - Prevent slurmctld daemon abort if "paths" operation
    fails. Now job will be held. Update job update time when held.
 -- Fix issues with QOS flags Partition[Min|Max]Nodes to work correctly.
 -- Increase number of ResumePrograms that can be managed without leaving
    zombie/orphan processes from 10 to 100.
 -- Refactor slurmctld agent logic to eliminate some pthreads.

* Changes in Slurm 16.05.9
==========================
 -- Fix parsing of SBCAST_COMPRESS environment variable in sbcast.
 -- Change some debug messages to errors in task/cgroup plugin.
 -- backfill scheduler: Stop trying to determine expected start time for a job
    after 2 seconds of wall time. This can happen if there are many running jobs
    and a pending job can not be started soon.
 -- Improve performance of cr_sort_part_rows() in cons_res plugin.
 -- CRAY - Fix dealock issue when updating accounting in the slurmctld and
    scheduling a Datawarp job.
 -- Correct the job state accounting information for jobs requeued due to burst
    buffer errors.
 -- burst_buffer/cray - Avoid "pre_run" operation if not using buffer (i.e.
    just creating or deleting a persistent burst buffer).
 -- Fix slurm.spec file support for BlueGene builds.
 -- Fix missing TRES read lock in acct_policy_job_runnable_pre_select() code.
 -- Fix debug2 message printing value using wrong array index in
    _qos_job_runnable_post_select().
 -- Prevent job timeout on node power up.
 -- MYSQL - Fix minor memory leak when querying steps and the sql fails.
 -- Make it so sacctmgr accepts column headers like MaxTRESPU and not MaxTRESP.
 -- Only look at SLURM_STEP_KILLED_MSG_NODE_ID on startup, to avoid race
    condition later when looking at a steps env.
 -- Make backfill scheduler behave like regular scheduler in respect to
    'assoc_limit_stop'.
 -- Allow a lower version client command to talk to a higher version contoller
    using the multi-cluster options (e.g. squeue -M<clsuter>).
 -- slurmctld/agent race condition fix: Prevent job launch while PrologSlurmctld
    daemon is running or node boot in progress.
 -- MYSQL - Fix a few other minor memory leaks when uncommon failures occur.
 -- burst_buffer/cray - Fix race condition that could cause multiple batch job
    launch requests resulting in drained nodes.
 -- Correct logic to purge old reservations.
 -- Fix DBD cache restore from previous versions.
 -- Fix to logic for getting expected start time of existing job ID with
    explicit begin time that is in the past.
 -- Clear job's reason of "BeginTime" in a more timely fashion and/or prevents
    them from being stuck in a PENDING state.
 -- Make sure acct policy limits imposed on a job are correct after requeue.

* Changes in Slurm 16.05.8
==========================
 -- Remove StoragePass from being printed out in the slurmdbd log at debug2
    level.
 -- Defer PATH search for task program until launch in slurmstepd.
 -- Modify regression test1.89 to avoid leaving vestigial job. Also reduce
    logging to reduce likelyhood of Expect buffer overflow.
 -- Do not PATH search for mult-prog launches if LaunchParamters=test_exec is
    enabled.
 -- Fix for possible infinite loop in select/cons_res plugin when trying to
    satisfy a job's ntasks_per_core or socket specification.
 -- If job is held for bad constraints make it so once updated the job doesn't
    go into JobAdminHeld.
 -- sched/backfill - Fix logic to reserve resources for jobs that require a
    node reboot (i.e. to change KNL mode) in order to start.
 -- When unpacking a node or front_end record from state and the protocol
    version is lower than the min version, set it to the min.
 -- Remove redundant lookup for part_ptr when updating a reservation's nodes.
 -- Fix memory and file descriptor leaks in slurmd daemon's sbcast logic.
 -- Do not allocate specialized cores to jobs using the --exclusive option.
 -- Cancel interactive job if Prolog failure with "PrologFlags=contain" or
    "PrologFlags=alloc" configured. Send new error prolog failure message to
    the salloc or srun command as needed.
 -- Prevent possible out-of-bounds read in slurmstepd on an invalid #! line.
 -- Fix check for PluginDir within slurmctld to work with multiple directories.
 -- Cancel interactive jobs automatically on communication error to launching
    srun/salloc process.
 -- Fix security issue caused by insecure file path handling triggered by the
    failure of a Prolog script. To exploit this a user needs to anticipate or
    cause the Prolog to fail for their job. CVE-2016-10030.

* Changes in Slurm 16.05.7
==========================
 -- Fix issue in the priority/multifactor plugin where on a slurmctld restart,
    where more time is accounted for than should be allowed.
 -- cray/busrt_buffer - If total_space in a pool decreases, reset used_space
    rather than trying to account for buffer allocations in progress.
 -- cray/busrt_buffer - Fix for double counting of used_space at slurmctld
    startup.
 -- Fix regression in 16.05.6 where if you request multiple cpus per task (-c2)
    and request --ntasks-per-core=1 and only 1 task on the node
    the slurmd would abort on an infinite loop fatal.
 -- cray/busrt_buffer - Internally track both allocated and unusable space.
    The reported UsedSpace in a pool is now the allocated space (previously was
    unusable space). Base available space on whichever value leaves least free
    space.
 -- cray/burst_buffer - Preserve job ID and don't translate to job array ID.
 -- cray/burst_buffer - Update "instance" parsing to match updated dw_wlm_cli
    output.
 -- sched/backfill - Insure we don't try to start a job that was already started
    and requeued by the main scheduling logic.
 -- job_submit/lua - add access to the job features field in job_record.
 -- select/linear plugin modified to better support heterogeneous clusters when
    topology/none is also configured.
 -- Permit cancellation of jobs in configuring state.
 -- acct_gather_energy/rapl - prevent segfault in slurmd from race to gather
    data at slurmd startup.
 -- Integrate node_feature/knl_generic with "hbm" GRES information.
 -- Fix output routines to prevent rounding the TRES values for memory or BB.
 -- switch/cray plugin - fix use after free error.
 -- docs - elaborate on how way to clear TRES limits in sacctmgr.
 -- knl_cray plugin - Avoid abort from backup slurmctld at start time.
 -- cgroup plugins - fix two minor memory leaks.
 -- If a node is booting for some job, don't allocate additional jobs to the
    node until the boot completes.
 -- testsuite - fix job id output in test17.39.
 -- Modify backfill algorithm to improve performance with large numbers of
    running jobs. Group running jobs that end in a "similar" time frame using a
    time window that grows exponentially rather than linearly. After one second
    of wall time, simulate the termination of all remaining running jobs in
    order to respond in a reasonable time frame.
 -- Fix slurm_job_cpus_allocated_str_on_node_id() API call.
 -- sched/backfill plugin: Make malloc match data type (defined as uint32_t and
    allocated as int).
 -- srun - prevent segfault when terminating job step before step has launched.
 -- sacctmgr - prevent segfault when trying to reset usage for an invalid
    account name.
 -- Make the openssl crypto plugin compile with openssl >= 1.1.
 -- Fix SuspendExcNodes and SuspendExcParts on slurmctld reconfiguration.
 -- sbcast - prevent segfault in slurmd due to race condition between file
    transfers from separate jobs using zlib compression
 -- cray/burst_buffer - Increase time to synchronize operations between threads
    from 5 to 60 seconds ("setup" operation time observed over 17 seconds).
 -- node_features/knl_cray - Fix possible race condition when changing node
    state that could result in old KNL mode as an active features.
 -- Make sure if a job can't run because of resources we also check accounting
    limits after the node selection to make sure it doesn't violate those limits
    and if it does change the reason for waiting so we don't reserve resources
    on jobs violating accounting limits.
 -- NRT - Make it so a system running against IBM's PE will work with PE
    version 1.3.
 -- NRT - Make it so protocols pgas and test are allowed to be used.
 -- NRT - Make it so you can have more than 1 protocol listed in MP_MSG_API.
 -- cray/burst_buffer - If slurmctld daemon restarts with pending job and burst
    buffer having unknown file stage-in status, teardown the buffer, defer the
    job, and start stage-in over again.
 -- On state restore in the slurmctld don't overwrite the mem_spec_limit given
    from the slurm.conf when using FastSchedule=0.
 -- Recognize a KNL's proper NUMA count (rather than setting it to the value
    in slurm.conf) when using FastSchedule=0.
 -- Fix parsing in regression test1.92 for some prompts.
 -- sbcast - use slurmd's gid cache rather than a separate lookup.
 -- slurmd - return error if setgroups() call fails in _drop_privileges().
 -- Remove error messages about gres counts changing when a job is resized on
    a slurmctld restart or reconfig, as they aren't really error messages.
 -- Fix possible memory corruption if a job is using GRES and changing size.
 -- jobcomp/elasticsearch - fix printf format for a value on 32-bit builds.
 -- task/cgroup - Change error message if CPU binding can not take place to
    better identify the root cause of the problem.
 -- Fix issue where task/cgroup would not always honor --cpu_bind=threads.
 -- Fix race condition in with getgrouplist() in slurmd that can lead to
    user accounts being granted access to incorrect group memberships during
    job launch.

* Changes in Slurm 16.05.6
==========================
 -- Docs - the correct default value for GroupUpdateForce is 0.
 -- mpi/pmix - improve point to point communication performance.
 -- SlurmDB - include pending jobs in search during 'sacctmgr show runawayjobs'.
 -- Add client side out-of-range checks to --nice flag.
 -- Fix support for sbatch "-W" option, previously eeded to use "--wait".
 -- node_features/knl_cray plugin and capmc_suspend/resume programs modified to
    sleep and retry capmc operations if the Cray State Manager is down. Added
    CapmcRetries configuration parameter to knl_cray.conf.
 -- node_features/knl_cray plugin: Remove any KNL MCDRAM or NUMA features from
    node's configuration if capmc does NOT report the node as being KNL.
 -- node_features/knl_cray plugin: drain any node not reported by
    "capmc node_status" on startup or reconfig.
 -- node_features/knl_cray plugin: Substantially streamline and speed up logic
    to load current node state on reconfigure failure or unexpected node boot.
 -- node_features/knl_cray plugin: Add separate thread to interact with capmc
    in response to unexpected node reboots.
 -- node_features plugin - Add "mode" argument to node_features_p_node_xlate()
    function to fix some bugs updating a node's features using the node update
    RPC.
 -- node_features/knl_cray plugin: If the reconfiguration of nodes for an
    interactive job fails, kill the job (it can't be requeued like a batch job).
 -- Testsuite - Added srun/salloc/sbatch tests with --use-min-nodes option.
 -- Fix typo when an error occurs when discovering pmix version on
    configure.
 -- Fix configuring pmix support when you have your lib dir symlinked to lib64.
 -- Fix waiting reason if a job is waiting for a specific limit instead of
    always just AccountingPolicy.
 -- Correct SchedulerParameters=bf_busy_nodes logic with respect to the job's
    minimum node count. Previous logic would not decremement counter in some
    locations and reject valid job request for not reaching minimum node count.
 -- Fix FreeBSD-11 build by using llabs() function in place of abs().
 -- Cray: The slurmd can manipulate the socket/core/thread values reported based
    upon the configuration. The logic failed to consider select/cray with
    SelectTypeParameters=other_cons_res as equivalent to select/cons_res.
 -- If a node's socket or core count are changed at registration time (e.g. a
    KNL node's NUMA mode is changed), change it's board count to match.
 -- Prevent possible divide by zero in select/cons_res if a node's board count
    is higher than it's socket count.
 -- Allow an advanced reservation to contain a license count of zero.
 -- Preserve non-KNL node features when updating the KNL node features for a
    multi-node job in which the non-KNL node features vary by node.
 -- task/affinity plugin: Honor a job's --ntasks-per-socket and
    --ntasks-per-core options in task binding.
 -- slurmd - do not print ClusterName when using 'slurmd -C'.
 -- Correct a bitmap test function (used only by the select/bluegene plugin).
 -- Do not propagate SLURM_UMASK environment variable to batch script.
 -- Added node_features/knl_generic plugin for KNL support on non-Cray systems.
 -- Cray: Prevent abort in backfill scheduling logic for requeued job that has
    been cancelled while NHC is running.
 -- Improve reported estimates of start and end times for pending jobs.
 -- pbsnodes: Show OS value as "unknown" for down nodes.
 -- BlueGene - correctly scale node counts when enforcing MaxNodes limit take 2.
 -- Fix "sbatch --hold" to set JobHeldUser correctly instead of JobHeldAdmin.
 -- Cray - print warning that task/cgroup is required, and must be after
    task/cray in the TaskPlugin settings.
 -- Document that node Weight takes precedence over load with LLN scheduling.
 -- Fix issue where gang scheduling could happen even with OverSubscribe=NO.
 -- Expose JOB_SHARED_* values to job_submit/lua plugin.
 -- Fix issue where number of nodes is not properly allocated when srun is
    requested with -n tasks < hosts from -w hostlist.
 -- Update srun documentation for -N, -w and -m arbitrary.
 -- Fix bug that was clearing MAINT mode on nodes scheduled for reboot (bug
    introduced in version 16.05.5 to address bug in overlapping reservations).
 -- Add logging of node reboot requests.
 -- Docs - remove recommendation for ReleaseAgent setting in cgroup.conf.
 -- Make sure a job cleans up completely if it has a node fail.  Mostly an
    issue with gang scheduling.

* Changes in Slurm 16.05.5
==========================
 -- Fix accounting for jobs requeued after the previous job was finished.
 -- slurmstepd modified to pre-load all relevant plugins at startup to avoid
    the possibility of modified plugins later resulting in inconsistent API
    or data structures and a failure of slurmstepd.
 -- Export functions from parse_time.c in libslurm.so.
 -- Export unit convert functions from slurm_protocol_api.c in libslurm.so.
 -- Fix scancel to allow multiple steps from a job to be cancelled at once.
 -- Update and expand upgrade guide (in Quick Start Administrator web page).
 -- burst_buffer/cray: Requeue, but do not hold a job which fails the pre_run
    operation.
 -- Insure reported expected job start time is not in the past for pending jobs.
 -- Add support for PMIx v2.
 -- mpi/pmix: support for passing TMPDIR path through info key
 -- Cray: update slurmconfgen_smw.py script to correctly identify service nodes
    versus compute nodes.
 -- FreeBSD - fix build issue in knl_cray plugin.
 -- Corrections to gres.conf parsing logic.
 -- Make partition State independent of EnforcePartLimits value.
 -- Fix multipart srun submission with EnforcePartLimits=NO and job violating
    the partition limits.
 -- Fix problem updating job state_reason.
 -- pmix - Provide HWLOC topology in the job-data if Slurm was configured
    with hwloc.
 -- Cray - Fix issue restoring jobs when blade count increases due to hardware
    reconfiguration.
 -- burst_buffer/cray - Hold job after 3 failed pre-run operations.
 -- sched/backfill - Check that a user's QOS is allowed to use a partition
    before trying to schedule resources on that partition for the job.
 -- sacctmgr - Fix displaying nodenames when printing out events or
    reservations.
 -- Fix mpiexec wrapper to accept task count with more than one digit.
 -- Add mpiexec man page to the script.
 -- Add salloc_wait_nodes option to the SchedulerParameters parameter in the
    slurm.conf file controlling when the salloc command returns in relation to
    when nodes are ready for use (i.e. booted).
 -- Handle case when slurmctld daemon restart while compute node reboot in
    progress. Return node to service rather than setting DOWN.
 -- Preserve node "RESERVATION" state when one of multiple overlapping
    reservations ends.
 -- Restructure srun command locking for task_exit processing logic for improved
    parallelism.
 -- Modify srun task completion handling to only build the task/node string for
    logging purposes if it is needed. Modified for performance purposes.
 -- Docs - update salloc/sbatch/srun man pages to mention corresponding
    environment variables for --mem/--mem-per-cpu and allowed suffixes.
 -- Silence srun warning when overriding the job ntasks-per-node count
    with a lower task count for the step.
 -- Docs - assorted spelling fixes.
 -- node_features/knl_cray: Fix bug where MCDRAM state could be taken from
    capmc rather than cnselect.
 -- node_features/knl_cray: If a node is rebooted outside of Slurm's direction,
    update it's active features with current MCDRAM and NUMA mode information.
 -- Restore ability to manually power down nodes, broken in 15.08.12.
 -- Don't log error for job end_time being zero if node health check is still
    running.
 -- When powering up a node to change it's state (e.g. KNL NUMA or MCDRAM mode)
    then pass to the ResumeProgram the job ID assigned to the nodes in the
    SLURM_JOB_ID environment variable.
 -- Allow a node's PowerUp state flag to be cleared using update_node RPC.
 -- capmc_suspend/resume - If a request modify NUMA or MCDRAM state on a set of
    nodes or reboot a set of nodes fails then just requeue the job and abort the
    entire operation rather than trying to operate on individual nodes.
 -- node_features/knl_cray plugin: Increase default CapmcTimeout parameter from
    10 to 60 seconds.
 -- Fix squeue filter by job license when a job has requested more than 1
    license of a certain type.
 -- Fix bug in PMIX_Ring in the pmi2 plugin so that it supports singleton mode.
    It also updates the testpmixring.c test program so it can be used to check
    singleton runs.
 -- Automically clean up task/cgroup cpuset and devices cgroups after steps are
    completed.
 -- Testsuite - Fix test1.83 to handle gaps in node names properly.
 -- BlueGene - correctly scale node counts when enforcing MaxNodes limit.
 -- Make sure no attempt is made to schedule a requeued job until all steps are
    cleaned (Node Health Check completes for all steps on a Cray).
 -- KNL: Correct task affinity logic for some NUMA modes.
 -- Add salloc/sbatch/srun --priority option of "TOP" to set job priority to
    the highest possible value. This option is only available to Slurm operators
    and administrators.
 -- Add salloc/sbatch/srun option --use-min-nodes to prefer smaller node counts
    when a range of node counts is specified (e.g. "-N 2-4").
 -- Validate salloc/sbatch --wait-all-nodes argument.
 -- Add "sbatch_wait_nodes" to SchedulerParameters to control default sbatch
    behaviour with respect to waiting for all allocated nodes to be ready for
    use. Job can override the configuration option using the --wait-all-nodes=#
    option.
 -- Prevent partition group access updates from resetting last_part_update when
    no changes have been made. Prevents backfill scheduler from restarting
    mid-cycle unnecessarily.
 -- Cray - add NHC_ABSOLUTELY_NO to never run NHC, even on certain edge cases
    that it would otherwise be run on with NHC_NO.
 -- Ignore GRES/QOS updates that maintain the same value as before.
 -- mpi/pmix - prepare temp directory for application.
 -- Fix display for the nice and priority values in sprio/scontrol/squeue.

* Changes in Slurm 16.05.4
==========================
 -- Fix potential deadlock if running with message aggregation.
 -- Streamline when schedule() is called when running with message aggregation
    on batch script completes.
 -- Fix incorrect casting when [un]packing derived_ec on slurmdb_job_rec_t.
 -- Document that persistent burst buffers can not be created or destroyed using
    the salloc or srun --bb options.
 -- Add support for setting the SLURM_JOB_ACCOUNT, SLURM_JOB_QOS and
    SLURM_JOB_RESERVAION environment variables are set for the salloc command.
    Document the same environment variables for the salloc, sbatch and srun
    commands in their man pages.
 -- Fix issue where sacctmgr load cluster.cfg wouldn't load associations
    that had a partition in them.
 -- Don't return the extern step from sstat by default.
 -- In sstat print 'extern' instead of 4294967295 for the extern step.
 -- Make advanced reservations work properly with core specialization.
 -- Fix race condition in the account_gather plugin that could result in job
    stuck in COMPLETING state.
 -- Regression test fixes if SelectTypePlugin not managing memory and no node
    memory size set (defaults to 1 MB per node).
 -- Add missing partition write locks to _slurm_rpc_dump_nodes/node_single to
    prevent a race condition leading to inconsistent sinfo results.
 -- Fix task:CPU binding logic for some processors. This bug was introduced
    in version 16.05.1 to address KNL bunding problem.
 -- Fix two minor memory leaks in slurmctld.
 -- Improve partition-specific limit logging from slurmctld daemon.
 -- Fix incorrect access check when using MaxNodes setting on the partition.
 -- Fix issue with sacctmgr when specifying a list of clusters to query.
 -- Fix issue when calculating future StartTime for a job.
 -- Make EnforcePartLimit support logic work with any ordering of partitions
    in job submit request.
 -- Prevent restoration of wrong CPU governor and frequency when using
    multiple task plugins.
 -- Prevent slurmd abort if hwloc library fails to populate the "children"
    arrays (observed with hwloc version "dev-333-g85ea6e4").
 -- burst_buffer/cray: Add "--groupid" to DataWarp "setup" command.
 -- Fix lustre profiling putting it in the Filesystem dataset instead of the
    Network dataset.
 -- Fix profiling documentation and code to match be consistent with
    Filesystem instead of Lustre.
 -- Correct the way watts is calculated in the rapl plugin when using a poll
    frequency other than AcctGatherNodeFreq.
 -- Don't about step launch if job reaches expected end time while node is
    configuring/booting (NOTE: The job end time will be adjusted after node
    becomes ready for use).
 -- Fix several print routines to respect a custom output delimiter when
    printing NO_VAL or INFINITE.
 -- Correct documented configurations where --ntasks-per-core and
    --ntasks-per-socket are supported.
 -- task/affinity plugin buffer allocated too small, can corrupt memory.

* Changes in Slurm 16.05.3
==========================
 -- Make it so the extern step uses a reverse tree when cleaning up.
 -- If extern step doesn't get added into the proctrack plugin make sure the
    sleep is killed.
 -- Fix areas the slurmctld can segfault if an extern step is in the system
    cleaning up on a restart.
 -- Prevent possible incorrect counting of GRES of a given type if a node has
    the multiple "types" of a given GRES "name", which could over-subscribe
    GRES of a given type.
 -- Add web links to Slurm Diamond Collectors (from Harvard University) and
    collectd (from EDF).
 -- Add job_submit plugin for the "reboot" field.
 -- Make some more Slurm constants (INFINITE, NO_VAL64, etc.) available to
    job_submit/lua plugins.
 -- Send in a -1 for a taskid into spank_task_post_fork for the extern_step.
 -- MYSQL - Sightly better logic if a job completion comes in with an end time
    of 0.
 -- task/cgroup plugin is configured with ConstrainRAMSpace=yes, then set soft
    memory limit to allocated memory limit (previously no soft limit was set).
 -- Document limitations in burst buffer use by the salloc command (possible
    access problems from a login node).
 -- Fix proctrack plugin to only add the pid of a process once
    (regression in 16.05.2).
 -- Fix for sstat to print correct info when requesting jobid.batch as part of
    a comma-separated list.
 -- CRAY - Fix issue if pid has already been added to another job container.
 -- CRAY - Fix add of extern step to AELD.
 -- burstbufer/cray: avoid batch submit error condition if waiting for stagein.
 -- CRAY - Fix for reporting steps lingering after they are already finished.
 -- Testsuite - fix test1.29 / 17.15 for limits with values above 32-bits.
 -- CRAY - Simplify when a NHC is called on a step that has unkillable
    processes.
 -- CRAY - If trying to kill a step and you have NHC_NO_STEPS set run NHC
    anyway to attempt to log the backtraces of the potential
    unkillable processes.
 -- Fix gang scheduling and license release logic if single node job killed on
    bad node.
 -- Make scontrol show steps show the extern step correctly.
 -- Do not scheduled powered down nodes in FAILED state.
 -- Do not start slurmctld power_save thread until partition information is read
    in order to prevent race condition that can result invalid pointer when
    trying to resolve configured SuspendExcParts.
 -- Add SLURM_PENDING_STEP id so it won't be confused with SLURM_EXTERN_CONT.
 -- Fix for core selection with job --gres-flags=enforce-binding option.
    Previous logic would in some cases allocate a job zero cores, resulting in
    slurmctld abort.
 -- Minimize preempted jobs for configurations with multiple jobs per node.
 -- Improve partition AllowGroups caching. Update the table of UIDs permitted to
    use a partition based upon it's AllowGroups configuration parameter as new
    valid UIDs are found rather than looking up that user's group information
    for every job they submit. If the user is now allowed to use the partition,
    then do not check that user's group access again for 5 seconds.
 -- Add routing queue information to Slurm FAQ web page.
 -- Do not select_g_step_finish() a SLURM_PENDING_STEP step, as nothing has
    been allocated for the step yet.
 -- Fixed race condition in PMIx Fence logic.
 -- Prevent slurmctld abort if job is killed or requeued while waiting for
    reboot of its allocated compute nodes.
 -- Treat invalid user ID in AllowUserBoot option of knl.conf file as error
    rather than fatal (log and do not exit).
 -- qsub - When doing the default output files for an array in qsub style
    make them using the master job ID instead of the normal job ID.
 -- Create the extern step while creating the job instead of waiting until the
    end of the job to do it.
 -- Always report a 0 exit code for the extern step instead of being canceled
    or failed based on the signal that would always be killing it.
 -- Fix to allow users to update QOS of pending jobs.
 -- CRAY - Fix minor memory leak in switch plugin.
 -- CRAY - Change slurmconfgen_smw.py to skip over disabled nodes.
 -- Fix eligible_time for elasticsearch as well as add queue_wait
    (difference between start of job and when it was eligible).


* 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.
 -- Move test for job wait reason value of BurstBufferResources and
    BurstBufferStageIn later in the scheduling logic.
 -- Document which srun options apply to only job, only step, or job and step
    allocations.
 -- Use more compatible function to get thread name (>= 2.6.11).
 -- Fix order of job then step id when noting cleaning flag being set.
 -- Make it so the extern step sends a message with accounting information
    back to the slurmctld.
 -- Make it so the extern step calls the select_g_step_start|finish functions.
 -- Don't print error when extern step is canceled because job is ending.
 -- Handle a few error codes when dealing with the extern step to make sure
    we have the pids added to the system correctly.
 -- Add support for job dependencies with job array expressions. Previous logic
    required listing each task of job array individually.
 -- Make sure tres_cnt is set before creating a slurmdb_assoc_usage_t.
 -- Prevent backfill scheduler from starting a second "singleton" job if another
    one started during a backfill sleep.
 -- Fix for invalid array pointer when creating advanced reservation when job
    allocations span heterogeneous nodes (differing core or socket counts).
 -- Fix hostlist_ranged_string_xmalloc_dims to correctly not put brackets on
    hostlists when brackets == 0.
 -- Make sure we don't get brackets when making a range of reserved ports
    for a step.
 -- Change fatal to an error if port ranges aren't correct when reading state
    for steps.

* 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.
 -- 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.
 -- Documentation - clean up typos.
 -- 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
    completion, resulting in underflow error messages.
 -- 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.
 -- Improve sdiag output description in man page.
 -- 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.

* Changes in Slurm 16.05.0rc2
=============================
 -- 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.

* Changes in Slurm 16.05.0rc1
==============================
 -- 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.
 -- Fix build on FreeBSD.
 -- 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.
 -- Add SchedulerParameter no_env_cache, if set no env cache will be use when
    launching a job, instead the job will fail and drain the node if the env
    isn't loaded normally.
 -- burst_buffer/cray - Plug small memory leak on DataWarp create_persistent
    buffer error.
 -- burst_buffer/cray - Do not purge a job record if it's stage-out operation
    fails. The description of the failure will be in the job's "Reason" field.
 -- burst_buffer/cray - Append information about errors to job's AdminComments
    field.
 -- DBD - When using LogTimeFormat=thread_id fill in the cluster name before
    printing anything for a connection.
 -- Have srun read in modern env var's instead of obsolete ones
 -- mpi/pmix: add the thresholds for the parameters of micro-benchmarks.

* Changes in Slurm 16.05.0pre1
==============================
 -- Add sbatch "--wait" option that waits for job completion before exiting.
    Exit code will match that of spawned job.
 -- Modify advanced reservation save/restore logic for core reservations to
    support configuration changes (changes in configured nodes or cores counts).
 -- Allow ControlMachine, BackupController, DbdHost and DbdBackupHost to be
    either short or long hostname.
 -- Job output and error files can now contain "%" character by specifying
    a file name with two consecutive "%" characters. For example,
    "sbatch -o "slurm.%%.%j" for job ID 123 will generate an output file named
    "slurm.%.123".
 -- Pass user name in Prolog RPC from controller to slurmd when using
    PrologFlags=Alloc. Allows SLURM_JOB_USER env variable to be set when using
    Native Slurm on a Cray.
 -- Add "NumTasks" to job information visible to Slurm commands.
 -- Add mail wrapper script "smail" that will include job statistics in email
    notification messages.
 -- Remove vestigial "SICP" job option (inter-cluster job option). Completely
    different logic will be forthcoming.
 -- Fix case where the primary and backup dbds would both be performing rollup.
 -- Add an ack reply from slurmd to slurmstepd when job setup is done and the
    job is ready to be executed.
 -- Removed support for authd. authd has not been developed and supported since
    several years. 
 -- Introduce a new parameter requeue_setup_env_fail in SchedulerParameters.
    A job that fails to setup the environment will be requeued and the node
    drained.
 -- Add ValidateTimeout and OtherTimeout to "scontrol show burst" output.
 -- Increase default sbcast buffer size from 512KB to 8MB.
 -- Enable the hdf5 profiling of the batch step.
 -- Eliminate redundant environment and script files for job arrays.
 -- Stop searching sbatch scripts for #PBS directives after 100 lines of
    non-comments. Stop parsing #PBS or #SLURM directives after 1024 characters
    into a line. Required for decent perforamnce with huge scripts.
 -- Add debug flag for timing Cray portions of the code.
 -- Remove all *.la files from RPMs.
 -- Add Multi-Category Security (MCS) infrastructure to permit nodes to be bound