NEWS

 -- Updated configure option "--enable-cray-emulation" (still under
    development) to emulate a cray XT/XE system, and auto-detect a real
    Cray XT/XE systems (removed no longer needed --enable-cray configure
    option).  Building on native Cray systems requires the
    cray-MySQL-devel-enterprise rpm and expat XML parser library/headers.

* Changes in SLURM 2.3.0.pre1
=============================
 -- Added that when a slurmctld closes the connection to the database it's
    registered host and port are removed.
 -- Added flag to slurmdbd.conf TrackSlurmctldDown where if set will mark idle
    resources as down on a cluster when a slurmctld disconnects or is no
    longer reachable.
 -- Added support for more than one front-end node to run slurmd on
    architectures where the slurmd does not execute on the compute nodes
    (e.g. BlueGene). New configuration parameters FrontendNode and FrontendAddr
    added. See "man slurm.conf" for more information.
 -- With the scontrol show job command when using the --details option, show
    a batch job's script.
 -- Add ability to create reservations or partitions and submit batch jobs
    using sview. Also add the ability to delete reservations and partitions.
 -- Added new configuration parameter MaxJobId. Once reached, restart job ID
    values at FirstJobId.
 -- When restarting slurmctld with priority/basic, increment all job priorities
    so the highest job priority becomes TOP_PRIORITY.

* Changes in SLURM 2.2.8
========================
 -- Prevent background salloc disconnecting terminal at termination. Patch by
    Don Albert, Bull.
 -- Fixed issue where preempt mode is skipped when creating a QOS. Patch by
    Bill Brophy, Bull.
 -- Fixed documention (html) for PriorityUsageResetPeriod to match that in the
    man pages. Patch by Nancy Kritkausky, Bull.

* Changes in SLURM 2.2.7
========================
 -- Eliminate zombie process created if salloc exits with stopped child
    process. Patch from Gerrit Renker, CSCS.
 -- With default configuration on non-Cray systems, enable salloc to be
    spawned as a background process. Based upon work by Don Albert (Bull) and
    Gerrit Renker (CSCS).
 -- Fixed Regression from 2.2.4 in accounting where an inherited limit
    would not be set correctly in the added child association.
 -- Fixed issue with accounting when asking for jobs with a hostlist.
 -- Avoid clearing a node's Arch, OS, BootTime and SlurmdStartTime when
    "scontrol reconfig" is run. Patch from Martin Perry, Bull.

* Changes in SLURM 2.2.6
========================
 -- Fix displaying of account coordinators with sacctmgr.  Possiblity to show
    deleted accounts.  Only a cosmetic issue, since the accounts are already
    deleted, and have no associations.
 -- Prevent opaque ncurses WINDOW struct on OS X 10.6.
 -- Fix issue with accounting when using PrivateData=jobs... users would not be
    able to view there own jobs unless they were admin or coordinators which is
    obviously wrong.
 -- Fix bug in node stat if slurmctld is restarted while nodes are in the
    process of being powered up. Patch from Andriy Grytsenko.
 -- Change maximum batch script size from 128k to 4M.
 -- Get slurmd -f option working. Patch from Andriy Grytsenko.
 -- Fix for linking problem on OSX. Patches from Jon Bringhurst (LANL) and
    Tyler Strickland.
 -- Reset a job's priority to zero (suspended) when Moab requeues the job.
    Patch from Par Andersson, NSC.
 -- When enforcing accounting, fix polling for unknown uids for users after
    the slurmctld started.  Previously one would have to issue a reconfigure
    to the slurmctld to have it look for new uids.
 -- BLUEGENE - if a block goes into an error state.  Fix issue where accounting
    wasn't updated correctly when the block was resumed.
 -- Synchronize power-save module better with scheduler. Patch from
    Andriy Grytsenko (Massive Solutions Limited).
 -- Avoid SEGV in association logic with user=NULL. Patch from
    Andriy Grytsenko (Massive Solutions Limited).
 -- Fixed issue in accounting where it was possible for a new
    association/wckey to be set incorrectly as a default the new object
    was added after an original default object already existed.  Before
    the slurmctld would need to be restarted to fix the issue.
 -- Updated the Normalized Usage section in priority_multifactor.shtml.
 -- Disable use of SQUEUE_FORMAT env var if squeue -l, -o, or -s option is
    used. Patch from Aaron Knister (UMBC).

* Changes in SLURM 2.2.5
========================
 -- Correct init.d/slurm status to have non-zero exit code if ANY Slurm
    damon that should be running on the node is not running. Patch from Rod
    Schulz, Bull.
 -- Improve accuracy of response to "srun --test-only jobid=#".
 -- Correct logic to properly support --ntasks-per-node option in the
    select/cons_res plugin. Patch from Rod Schulz, Bull.
 -- Fix bug in select/cons_res with respect to generic resource (gres)
    scheduling which prevented some jobs from starting as soon as possible.
 -- Fix memory leak in select/cons_res when backfill scheduling generic
    resources (gres).
 -- Fix for when configuring a node with more resources than in real life
    and using task/affinity.
 -- Fix so slurmctld will pack correctly 2.1 step information. (Only needed if
    a 2.1 client is talking to a 2.2 slurmctld.)
 -- Set powered down node's state to IDLE+POWER after slurmctld restart instead
    of leaving in UNKNOWN+POWER. Patch from Andrej Gritsenko.
 -- Fix bug where is srun's executable is not on it's current search path, but
    can be found in the user's default search path. Modify slurmstepd to find
    the executable. Patch from Andrej Gritsenko.
 -- Make sview display correct cpu count for steps.
 -- BLUEGENE - when running in overlap mode make sure to check the connection
    type so you can create overlapping blocks on the exact same nodes with
    different connection types (i.e. one torus, one mesh).
 -- Fix memory leak if MPI ports are reserved (for OpenMPI) and srun's
    --resv-ports option is used.
 -- Fix some anomalies in select/cons_res task layout when using the
    --cpus-per-task option. Patch from Martin Perry, Bull.
 -- Improve backfill scheduling logic when job specifies --ntasks-per-node and
    --mem-per-cpu options on a heterogeneous cluster. Patch from Bjorn-Helge
    Mevik, University of Oslo.
 -- Print warning message if srun specifies --cpus-per-task larger than used
    to create job allocation.
 -- Fix issue when changing a users name in accounting, if using wckeys would
    execute correctly, but bad memcopy would core the DBD.  No information
    would be lost or corrupted, but you would need to restart the DBD.

* Changes in SLURM 2.2.4
========================
 -- For batch jobs for which the Prolog fails, substitute the job ID for any
    "%j" in the job's output or error file specification.
 -- Add licenses field to the sview reservation information.
 -- BLUEGENE - Fix for handling extremely overloaded system on Dynamic system
    dealing with starting jobs on overlapping blocks.  Previous fallout
    was job would be requeued.  (happens very rarely)
 -- In accounting_storage/filetxt plugin, substitute spaces within job names,
    step names, and account names with an underscore to insure proper parsing.
 -- When building contribs/perlapi ignore both INSTALL_BASE and PERL_MM_OPT.
    Use PREFIX instead to avoid build errors from multiple installation
    specifications.
 -- Add job_submit/cnode plugin to support resource reservations of less than
    a full midplane on BlueGene computers. Treat cnodes as liceses which can
    be reserved and are consumed by jobs. This reservation mechanism for less
    than an entire midplane is still under development.
 -- Clear a job's "reason" field when a held job is released.
 -- When releasing a held job, calculate a new priority for it rather than
    just setting the priority to 1.
 -- Fix for sview started on a non-bluegene system to pick colors correctly
    when talking to a real bluegene system.
 -- Improve sched/backfill's expected start time calculation.
 -- Prevent abort of sacctmgr for dump command with invalid (or no) filename.
 -- Improve handling of job updates when using limits in accounting, and
    updating jobs as a non-admin user.
 -- Fix for "squeue --states=all" option. Bug would show no jobs.
 -- Schedule jobs with reservations before those without reservations.
 -- Fix squeue/scancel to query correctly against accounts of different case.
 -- Abort an srun command when it's associated job gets aborted due to a
    dependency that can not be satisfied.
 -- In jobcomp plugins, report start time of zeroif pending job is cancelled.
    Previously may report expected start time.
 -- Fixed sacctmgr man to state correct variables.
 -- Select nodes based upon their Weight when job allocation requests include
    a constraint field with a count (e.g. "srun --constraint=gpu*2 -N4 a.out").
 -- Add support for user names that are entirely numeric and do not treat them
    as UID values. Patch from Dennis Leepow.
 -- Patch to un/pack double values properly if negative value.  Patch from
    Dennis Leepow
 -- Do not reset a job's priority when requeued or suspended.
 -- Fix problemm that could let new jobs start on a node in DRAINED state.
 -- Fix cosmetic sacctmgr issue where if the user you are trying to add
    doesn't exist in the /etc/passwd file and the account you are trying
    to add them to doesn't exist it would print (null) instead of the bad
    account name.
 -- Fix associations/qos for when adding back a previously deleted object
    the object will be cleared of all old limits.
 -- BLUEGENE - Added back a lock when creating dynamic blocks to be more thread
    safe on larger systems with heavy load.

* Changes in SLURM 2.2.3
========================
 -- Update srun, salloc, and sbatch man page description of --distribution
    option. Patches from Rod Schulz, Bull.
 -- Applied patch from Martin Perry to fix "Incorrect results for task/affinity
    block second distribution and cpus-per-task > 1" bug.
 -- Avoid setting a job's eligible time while held (priority == 0).
 -- Substantial performance improvement to backfill scheduling. Patch from
    Bjorn-Helge Mevik, University of Oslo.
 -- Make timeout for communications to the slurmctld be based upon the
    MessageTimeout configuration parameter rather than always 3 seconds.
    Patch from Matthieu Hautreux, CEA.
 -- Add new scontrol option of "show aliases" to report every NodeName that is
    associated with a given NodeHostName when running multiple slurmd daemons
    per compute node (typically used for testing purposes). Patch from
    Matthieu Hautreux, CEA.
 -- Fix for handling job names with a "'" in the name within MySQL accounting.
    Patch from Gerrit Renker, CSCS.
 -- Modify condition under which salloc execution delayed until moved to the
    foreground. Patch from Gerrit Renker, CSCS.
	Job control for interactive salloc sessions: only if ...
	a) input is from a terminal (stdin has valid termios attributes),
	b) controlling terminal exists (non-negative tpgid),
	c) salloc is not run in allocation-only (--no-shell) mode,
	d) salloc runs in its own process group (true in interactive
	   shells that support job control),
	e) salloc has been configured at compile-time to support background
	   execution and is not currently in the background process group.
 -- Abort salloc if no controlling terminal and --no-shell option is not used
    ("setsid salloc ..." is disabled). Patch from Gerrit Renker, CSCS.
 -- Fix to gang scheduling logic which could cause jobs to not be suspended
    or resumed when appropriate.
 -- Applied patch from Martin Perry to fix "Slurmd abort when using task
    affinity with plane distribution" bug.
 -- Applied patch from Yiannis Georgiou to fix "Problem with cpu binding to
    sockets option" behaviour. This change causes "--cpu_bind=sockets" to bind
    tasks only to the CPUs on each socket allocated to the job rather than all
    CPUs on each socket.
 -- Advance daily or weekly reservations immediately after termination to avoid
    having a job start that runs into the reservation when later advanced.
 -- Fix for enabling users to change there own default account, wckey, or QOS.
 -- BLUEGENE - If using OVERLAP mode fixed issue with multiple overlapping
    blocks in error mode.
 -- Fix for sacctmgr to display correctly default accounts.
 -- scancel -s SIGKILL will always sent the RPC to the slurmctld rather than
    the slurmd daemon(s). This insures that tasks in the process of getting
    spawned are killed.
 -- BLUEGENE - If using OVERLAP mode fixed issue with jobs getting denied
    at submit if the only option for their job was overlapping a block in
    error state.

* Changes in SLURM 2.2.2
========================
 -- Correct logic to set correct job hold state (admin or user) when setting
    the job's priority using scontrol's "update jobid=..." rather than its
    "hold" or "holdu" commands.
 -- Modify squeue to report unset --mincores, --minthreads or --extra-node-info
    values as "*" rather than 65534. Patch from Rod Schulz, BULL.
 -- Report the StartTime of a job as "Unknown" rather than the year 2106 if its
    expected start time was too far in the future for the backfill scheduler
    to compute.
 -- Prevent a pending job reason field from inappropriately being set to
    "Priority".
 -- In sched/backfill with jobs having QOS_FLAG_NO_RESERVE set, then don't
    consider the job's time limit when attempting to backfill schedule. The job
    will just be preempted as needed at any time.
 -- Eliminated a bug in sbatch when no valid target clusters are specified.
 -- When explicitly sending a signal to a job with the scancel command and that
    job is in a pending state, then send the request directly to the slurmctld
    daemon and do not attempt to send the request to slurmd daemons, which are
    not running the job anyway.
 -- In slurmctld, properly set the up_node_bitmap when setting it's state to
    IDLE (in case the previous node state was DOWN).
 -- Fix smap to process block midplane names correctly when on a bluegene
    system.
 -- Fix smap to once again print out the Letter 'ID' for each line of a block/
    partition view.
 -- Corrected the NOTES section of the scancel man page
 -- Fix for accounting_storage/mysql plugin to correctly query cluster based
    transactions.
 -- Fix issue when updating database for clusters that were previously deleted
    before upgrade to 2.2 database.
 -- BLUEGENE - Handle mesh torus check better in dynamic mode.
 -- BLUEGENE - Fixed race condition when freeing block, most likely only would
    happen in emulation.
 -- Fix for calculating used QOS limits correctly on a slurmctld reconfig.
 -- BLUEGENE - Fix for bad conn-type set when running small blocks in HTC mode.
 -- If salloc's --no-shell option is used, then do not attempt to preserve the
    terminal's state.
 -- Add new SLURM configure time parameter of --disable-salloc-background. If
    set, then salloc can only execute in the foreground. If started in the
    background, then a message will be printed and the job allocation halted
    until brought into the foreground.
    NOTE: THIS IS A CHANGE IN DEFAULT SALLOC BEHAVIOR FROM V2.2.1, BUT IS
    CONSISTENT WITH V2.1 AND EARLIER.
 -- Added the Multi-Cluster Operation web page.
 -- Removed remnant code for enforcing max sockets/cores/threads in the
    cons_res plugin (see last item in 2.1.0-pre5).  This was responsible
    for a bug reported by Rod Schultz.
 -- BLUEGENE - Set correct env vars for HTC mode on a P system to get correct
    block.
 -- Correct RunTime reported by "scontrol show job" for pending jobs.

* Changes in SLURM 2.2.1
========================
 -- Fix setting derived exit code correctly for jobs that happen to have the
    same jobid.
 -- Better checking for time overflow when rolling up in accounting.
 -- Add scancel --reservation option to cancel all jobs associated with a
    specific reservation.
 -- Treat reservation with no nodes like one that starts later (let jobs of any
    size get queued and do not block any pending jobs).
 -- Fix bug in gang scheduling logic that would temporarily resume to many jobs
    after a job completed.
 -- Change srun message about job step being deferred due to SlurmctldProlog
    running to be more clear and only print when --verbose option is used.
 -- Made it so you could remove the hold on jobs with sview by setting the
    priority to infinite.
 -- BLUEGENE - better checking small blocks in dynamic mode whether a full
    midplane job could run or not.
 -- Decrease the maximum sleep time between srun job step creation retry
    attempts from 60 seconds to 29 seconds. This should eliminate a possible
    synchronization problem with gang scheduling that could result in job
    step creation requests only occuring when a job is suspended.
 -- Fix to prevent changing a held job's state from HELD to DEPENDENCY
    until the job is released. Patch from Rod Schultz, Bull.
 -- Fixed sprio -M to reflect PriorityWeight values from remote cluster.
 -- Fix bug in sview when trying to update arbitrary field on more than one
    job. Formerly would display information about one job, but update next
    selected job.
 -- Made it so QOS with UsageFactor set to 0 would make it so jobs running
    under that QOS wouldn't add time to fairshare or association/qos
    limits.
 -- Fixed issue where QOS priority wasn't re-normalized until a slurmctld
    restart when a QOS priority was changed.
 -- Fix sprio to use calculated numbers from slurmctld instead of
    calulating it own numbers.
 -- BLUEGENE - fixed race condition with preemption where if the wind blows the
    right way the slurmctld could lock up when preempting jobs to run others.
 -- BLUEGENE - fixed epilog to wait until MMCS job is totally complete before
    finishing.
 -- BLUEGENE - more robust checking for states when freeing blocks.
 -- Added correct files to the slurm.spec file for correct perl api rpm
    creation.
 -- Added flag "NoReserve" to a QOS to make it so all jobs are created equal
    within a QOS.  So if larger, higher priority jobs are unable to run they
    don't prevent smaller jobs from running even if running the smaller
    jobs delay the start of the larger, higher priority jobs.
 -- BLUEGENE - Check preemptees one by one to preempt lower priority jobs first
    instead of first fit.
 -- In select/cons_res, correct handling of the option
    SelectTypeParameters=CR_ONE_TASK_PER_CORE.
 -- Fix for checking QOS to override partition limits, previously if not using
    QOS some limits would be overlooked.
 -- Fix bug which would terminate a job step if any of the nodes allocated to
    it were removed from the job's allocation. Now only the tasks on those
    nodes are terminated.
 -- Fixed issue when using a storage_accounting plugin directly without the
    slurmDBD updates weren't always sent correctly to the slurmctld, appears to
    OS dependent, reported by Fredrik Tegenfeldt.

* Changes in SLURM 2.2.0
========================
 -- Change format of Duration field in "scontrol show reservation" output from
    an integer number of minutes to "[days-]hours:minutes:seconds".
 -- Add support for changing the reservation of pending or running jobs.
 -- On Cray systems only, salloc sends SIGKILL to spawned process group when
    job allocation is revoked. Patch from Gerrit Renker, CSCS.
 -- Fix for sacctmgr to work correctly when modifying user associations where
    all the associations contain a partition.
 -- Minor mods to salloc signal handling logic: forwards more signals and
    releases allocation on real-time signals. Patch from Gerrit Renker, CSCS.
 -- Add salloc logic to preserve tty attributes after abnormal exit. Patch
    from Mark Grondona, LLNL.
 -- BLUEGENE - Fix for issue in dynamic mode when trying to create a block
    overlapping a block with no job running on it but in configuring state.
 -- BLUEGENE - Speedup by skipping blocks that are deallocating for other jobs
    when starting overlapping jobs in dynamic mode.
 -- Fix for sacct --state to work correctly when not specifying a start time.
 -- Fix upgrade process in accounting from 2.1 for clusters named "cluster".
 -- Export more jobacct_common symbols needed for the slurm api on some systems.

* Changes in SLURM 2.2.0.rc4
============================
 -- Correction in logic to spread out over time highly parallel messages to
    minimize lost messages. Effects slurmd epilog complete messages and PMI
    key-pair transmissions. Patch from Gerrit Renker, CSCS.
 -- Fixed issue where if a system has unset messages to the dbd in 2.1 and
    upgrades to 2.2.  Messages are now processed correctly now.
 -- Fixed issue where assoc_mgr cache wasn't always loaded correctly if the
    slurmdbd wasn't running when the slurmctld was started.
 -- Make sure on a pthread create in step launch that the error code is looked
    at. Improves fault-tolerance of slurmd.
 -- Fix setting up default acct/wckey when upgrading from 2.1 to 2.2.
 -- Fix issue with associations attached to a specific partition with no other
    association, and requesting a different partition.
 -- Added perlapi to the slurmdb to the slurm.spec.
 -- In sched/backfill, correct handling of CompleteWait parameter to avoid
    backfill scheduling while a job is completing. Patch from Gerrit Renker,
    CSCS.
 -- Send message back to user when trying to launch job on computing lacking
    that user ID. Patch from Hongjia Cao, NUDT.
 -- BLUEGENE - Fix it so 1 midplane clusters will run small block jobs.
 -- Add Command and WorkDir to the output of "scontrol show job" for job
    allocations created using srun (not just sbatch).
 -- Fixed sacctmgr to not add blank defaultqos' when doing a cluster dump.
 -- Correct processing of memory and disk space specifications in the salloc,
    sbatch, and srun commands to work properly with a suffix of "MB", "GB",
    etc. and not only with a single letter (e.g. "M", "G", etc.).
 -- Prevent nodes with suspended jobs from being powered down by SLURM.
 -- Normalized the way pidfile are created by the slurm daemons.
 -- Fixed modifying the root association to no read in it's last value
    when clearing a limit being set.
 -- Revert some resent signal handling logic from salloc so that SIGHUP sent
    after the job allocation will properly release the allocation and cause
    salloc to exit.
 -- BLUEGENE - Fix for recreating a block in a ready state.
 -- Fix debug flags for incorrect logic when dealing with DEBUG_FLAG_WIKI.
 -- Report reservation's Nodes as a hostlist expression of all nodes rather
    than using "ALL".
 -- Fix reporting of nodes in BlueGene reservation (was reporting CPU count
    rather than cnode count in scontrol output for NodeCnt field).

* Changes in SLURM 2.2.0.rc3
============================
 -- Modify sacctmgr command to accept plural versions of options (e.g. "Users"
    in addition to "User"). Patch from Don Albert, BULL.
 -- BLUEGENE - make it so reset of boot counter happens only on state change
    and not when a new job comes along.
 -- Modify srun and salloc signal handling so they can be interrupted while
    waiting for an allocation. This was broken in version 2.2.0.rc2.
 -- Fix NULL pointer reference in sview. Patch from Gerrit Renker, CSCS.
 -- Fix file descriptor leak in slurmstepd on spank_task_post_fork() failure.
    Patch from Gerrit Renker, CSCS.
 -- Fix bug in preserving job state information when upgrading from SLURM
    version 2.1. Bug introduced in version 2.2.0-pre10. Patch from Par
    Andersson, NSC.
 -- Fix bug where if using the slurmdbd if a job wasn't able to start right
    away some accounting information may be lost.
 -- BLUEGENE - when a prolog failure happens the offending block is put in
    an error state.
 -- Changed the last column heading of the sshare output from "FS Usage" to
    "FairShare" and added more detail to the sshare man page.
 -- Fix bug in enforcement of reservation by account name. Used wrong index
    into an array. Patch from Gerrit Renker, CSCS.
 -- Modify job_submit/lua plugin to treat any non-zero return code from the
    job_submit and job_modify functions as an error and the user request should
    be aborted.
 -- Fix bug which would permit pending job to be started on completing node
    when job preemption is configured.

* Changes in SLURM 2.2.0.rc2
============================
 -- Fix memory leak in job step allocation logic. Patch from Hongjia Cao, NUDT.
 -- If a preempted job was submitted with the --no-requeue option then cancel
    rather than requeue it.
 -- Fix for problems when adding a user for the first time to a new cluster
    with a 2.1 sacctmgr without specifying a default account.
 -- Resend TERMINATE_JOB message only to nodes that the job still has not
    terminated on. Patch from Hongjia Cao, NUDT.
 -- Treat time limit specification of "0:300" as a request for 300 seconds
    (5 minutes) instead of one minute.
 -- Modify sched/backfill plugin logic to continue working its way down the
    queue of jobs rather than restarting at the top if there are no changes in
    job, node, or partition state between runs. Patch from Hongjia Cao, NUDT.
 -- Improve scalability of select/cons_res logic. Patch from Matthieu Hautreux,
    CEA.
 -- Fix for possible deadlock in the slurmstepd when cancelling a job that is
    also writing a large amount of data to stderr.
 -- Fix in select/cons_res to eliminate "mem underflow" error when the
    slurmctld is reconfigured while a job is in completing state.
 -- Send a message to the a user's job when it's real or virual memory limit
    is exceeded. :
 -- Apply rlimits right before execing the users task so to lower the risk of
    the task exiting because the slurmstepd ran over a limit (log file size,
    etc.)
 -- Add scontrol command of "uhold <job_id>" so that an administrator can hold
    a job and let the job's owner release it. The scontrol command of
    "hold <job_id>" when executed by a SLURM administrator can only be released
    by a SLURM administrator and not the job owner.
 -- Change atoi to slurm_atoul in mysql plugin, needed for running on 32-bit
    systems in some cases.
 -- If a batch job is found to be missing from a node, make its termination
    state be NODE_FAIL rather than CANCELLED.
 -- Fatal error put back if running a bluegene or cray plugin from a controller
    not of that type.
 -- Make sure jobacct_gather plugin is not shutdown before messing with the
    proccess list.
 -- Modify signal handling in srun and salloc commands to avoid deadlock if the
    malloc function is interupted and called again. The malloc function is
    thread safe, but not reentrant, which is a problem when signal handling if
    the malloc function itself has a lock. Problem fixed by moving signal
    handling in those commands to a new pthread.
 -- In srun set job abort flag on completion to handle the case when a user
    cancels a job while the node is not responding but slurmctld has not yet
    the node down. Patch from Hongjia Cao, NUDT.
 -- Streamline the PMI logic if no duplicate keys are included in the key-pairs
    managed. Substantially improves performance for large numbers of tasks.
    Adds support for SLURM_PMI_KVS_NO_DUP_KEYS environment variable. Patch
    from Hongjia Cao, NUDT.
 -- Fix issues with sview dealing with older versions of sview and saving
    defaults.
 -- Remove references to --mincores, --minsockets, and --minthreads from the
    salloc, sbatch and srun man pages. These options are defunct, Patch from
    Rod Schultz, Bull.
 -- Made openssl not be required to build RPMs, it is not required anymore
    since munge is the default crypto plugin.
 -- sacctmgr now has smarts to figure out if a qos is a default qos when
    modifing a user/acct or removing a qos.
 -- For reservations on BlueGene systems, set and report c-node counts rather
    than midplane counts.

* Changes in SLURM 2.2.0.rc1
============================
 -- Add show_flags parameter to the slurm_load_block_info() function.
 -- perlapi has been brought up to speed courtesy of Hongjia Coa. (make sure to
    run 'make clean' if building in a different dir than source)
 -- Fixed regression in pre12 in crypto/munge when running with
    --enable-multiple-slurmd which would cause the slurmd's to core.
 -- Fixed regression where cpu count wasn't figured out correctly for steps.
 -- Fixed issue when using old mysql that can't handle a '.' in the table
    name.
 -- Mysql plugin works correctly without the SlurmDBD
 -- Added ability to query batch step with sstat.  Currently no accounting data
    is stored for the batch step, but the internals are inplace if we decide to
    do that in the future.
 -- Fixed some backwards compatibility issues with 2.2 talking to 2.1.
 -- Fixed regression where modifying associations didn't get sent to the
    slurmctld.
 -- Made sshare sort things the same way saccmgr list assoc does
    (alphabetically)
 -- Fixed issue with default accounts being set up correctly.
 -- Changed sortting in the slurmctld so sshare output is similar to that of
    sacctmgr list assoc.
 -- Modify reservation logic so that daily and weekly reservations maintain
    the same time when daylight savings time starts or ends in the interim.
 -- Edit to make reservations handle updates to associations.
 -- Added the derived exit code to the slurmctld job record and the derived
    exit code and string to the job record in the SLURM db.
 -- Added slurm-sjobexit RPM for SLURM job exit code management tools.
 -- Added ability to use sstat/sacct against the batch step.
 -- Added OnlyDefaults option to sacctmgr list associations.
 -- Modified the fairshare priority formula to F = 2**(-Ue/S)
 -- Modify the PMI functions key-pair exchange function to support a 32-bit
    counter for larger job sizes. Patch from Hongjia Cao, NUDT.
 -- In sched/builtin - Make the estimated job start time logic faster (borrowed
    new logic from sched/backfill and added pthread) and more accurate.
 -- In select/cons_res fix bug that could result in a job being allocated zero
    CPUs on some nodes. Patch from Hongjia Cao, NUDT.
 -- Fix bug in sched/backfill that could set expected start time of a job too
    far in the future.
 -- Added ability to enforce new limits given to associations/qos on
    pending jobs.
 -- Increase max message size for the slurmdbd from 1000000 to 16*1024*1024
 -- Increase number of active threads in the slurmdbd from 50 to 100
 -- Fixed small bug in src/common/slurmdb_defs.c reported by Bjorn-Helge Mevik
 -- Fixed sacctmgr's ability to query associations against qos again.
 -- Fixed sview show config on non-bluegene systems.
 -- Fixed bug in selecting jobs based on sacct -N option
 -- Fix bug that prevented job Epilog from running more than once on a node if
    a job was requeued and started no job steps.
 -- Fixed issue where node index wasn't stored correcting when using DBD.
 -- Enable srun's use of the --nodes option with --exclusive (previously the
    --nodes option was ignored).
 -- Added UsageThreshold and Flags to the QOS object.
 -- Patch to improve threadsafeness in the mysql plugins.
 -- Add support for fair-share scheduling to be based upon resource use at
    the level of bank accounts and ignore use of individual users. Patch by
    Par Andersson, National Supercomputer Centre, Sweden.

* Changes in SLURM 2.2.0.pre12
==============================
 -- Log if Prolog or Epilog run for longer than MessageTimeout / 2.
 -- Log the RPC number associated with messages from slurmctld that timeout.
 -- Fix bug in select/cons_res logic when job allocation includes --overcommit
    and --ntasks-per-node options and the node has fewer CPUs than the count
    specified by --ntasks-per-node.
 -- Fix bug in gang scheduling and job preemption logic so that preempted jobs
    get resumed properly after a slurmctld hot-start.
 -- Fix bug in select/linear handling of gang scheduled jobs that could result
    in run_job_cnt underflow error message.
 -- Fix bug in gang scheduling logic to properly support partitions added
    using the scontrol command.
 -- Fix a segmentation fault in sview where the 'excluded_partitions' field
    was set to NULL, caused by the absence of ~/.slurm/sviewrc.
 -- Rewrote some calls to is_user_any_coord() in src/plugins/accounting_storage
    modules to make use of is_user_any_coord()'s return value.
 -- Add configure option of --with=dimensions=#.
 -- Modify srun ping logic so that srun would only be considered not responsive
    if three ping messages were not responded to. Patch from Hongjia Cao (NUDT).
 -- Preserve a node's ReasonTime field after scontrol reconfig command. Patch
    from Hongjia Cao (NUDT).
 -- Added the authority for users with AdminLevel's defined in the SLURM db
    (Operators and Admins) and account coordinators to invoke commands that
    affect jobs, reservations, nodes, etc.
 -- Fix for slurmd restart on completing node with no tasks to get the correct
    state, completing. Patch from Hongjia Cao (NUDT).
 -- Prevent scontrol setting a node's Reason="". Patch from Hongjia Cao (NUDT).
 -- Add new functions hostlist_ranged_string_malloc,
    hostlist_ranged_string_xmalloc, hostlist_deranged_string_malloc, and
    hostlist_deranged_string_xmalloc which will allocate memory as needed.
 -- Make the slurm commands support both the --cluster and --clusters option.
    Previously, some commands support one of those options, but not the other.
 -- Fix bug when resizing a job that has steps running on some of those nodes.
    Avoid killing the job step on remaining nodes. Patch from Rod Schultz
    (BULL). Also fix bug related to tracking the CPUs allocated to job steps
    on each node after releasing some nodes from the job's allocation.
 -- Applied patch from Rod Schultz / Matthieu Hautreux to keep the Node-to-Host
    cache from becoming corrupted when a hostname cannot be resolved.
 -- Export more symbols in libslurm for job and node state information
    translation (numbers to strings). Patch from Hongia Cao, NUDT.
 -- Add logic to retry sending RESPONSE_LAUNCH_TASKS messages from slurmd to
    srun. Patch from Hongia Cao, NUDT.
 -- Modify bit_unfmt_hexmask() and bit_unfmt_binmask() functions to clear the
    bitmap input before setting the bits indicated in the input string.
 -- Add SchedulerParameters option of bf_window to control how far into the
    future that the backfill scheduler will look when considering jobs to start.
    The default value is one day. See "man slurm.conf" for details.
 -- Fix bug that can result in duplicate job termination records in accounting
    for job termination when slurmctld restarts or reconfigures.
 -- Modify plugin and library logic as needed to support use of the function
    slurm_job_step_stat() from user commands.
 -- Fix race condition in which PrologSlurmctld failure could cause slurmctld
    to abort.
 -- Fix bug preventing users in secondary user groups from being granted access
    to partitions configured with AllowGroups.
 -- Added support for a default account and wckey per cluster within accounting.
 -- Modified select/cons_res plugin so that if MaxMemPerCPU is configured and a
    job specifies it's memory requirement, then more CPUs than requested will
    automatically be allocated to a job to honor the MaxMemPerCPU parameter.
 -- Added the derived_ec (exit_code) member to job_info_t.  exit_code captures
    the exit code of the job script (or salloc) while derived_ec contains the
    highest exit code of all the job steps.
 -- Added SLURM_JOB_EXIT_CODE and SLURM_JOB_DERIVED_EC variables to the
    EpilogSlurmctld environment
 -- More work done on the accounting_storage/pgsql plugin, still beta.
    Patch from Hongjia Cao (NUDT).
 -- Major updates to sview from Dan Rusak (Bull), including:
    - Persistent option selections for each tab page
    - Clean up topology in grids
    - Leverage AllowGroups and Hidden options
    - Cascade full-info popups for ease of selection
 -- Add locks around the MySQL calls for proper operation if the non-thread
    safe version of the MySQL library is used.
 -- Remove libslurm.a, libpmi.a and libslurmdb.a from SLURM RPM. These static
    libraries are not generally usable.
 -- Fixed bug in sacctmgr when zeroing raw usage reported by Gerrit Renker.

* Changes in SLURM 2.2.0.pre11
==============================
 -- Permit a regular user to change the partition of a pending job.
 -- Major re-write of the job_submit/lua plugin to pass pointers to available
    partitions and use lua metatables to reference the job and partition fields.
 -- Add support for serveral new trigger types: SlurmDBD failure/restart,
    Database failure/restart, Slurmctld failure/restart.
 -- Add support for SLURM_CLUSTERS environment variable in the sbatch, sinfo,
    squeue commands.
 -- Modify the sinfo and squeue commands to report state of multiple clusters
    if the --clusters option is used.
 -- Added printf __attribute__ qualifiers to info, debug, ... to help prevent
    bad/incorrect parameters being sent to them.  Original patch from
    Eygene Ryabinkin (Russian Research Centre).
 -- Fix bug in slurmctld job completion logic when nodes allocated to a
    completing job are re-booted. Patch from Hongjia Cao (NUDT).
 -- In slurmctld's node record data structure, rename "hilbert_integer" to
    "node_rank".
 -- Add topology/node_rank plugin to sort nodes based upon rank loaded from
    BASIL on Cray computers.
 -- Fix memory leak in the auth/munge and crypto/munge plugins in the case of
    some failure modes.

* Changes in SLURM 2.2.0.pre10
==============================
 -- Fix issue when EnforcePartLimits=yes in slurm.conf all jobs where no nodecnt
    was specified the job would be seen to have maxnodes=0 which would not
    allow jobs to run.
 -- Fix issue where if not suspending a job the gang scheduler does the correct
    kill procedure.
 -- Fixed some issues when dealing with jobs from a 2.1 system so they live
    after an upgrade.
 -- In srun, log if --cpu_bind options are specified, but not supported by the
    current system configuration.
 -- Various Patchs from Hongjia Cao dealing with bugs found in sacctmgr and
    the slurmdbd.
 -- Fix bug in changing the nodes allocated to a running job and some node
    names specified are invalid, avoid invalid memory reference.
 -- Fixed filename substitution of %h and %n based on patch from Ralph Bean
 -- Added better job sorting logic when preempting jobs with qos.
 -- Log the IP address and port number for some communication errors.
 -- Fix bug in select/cons_res when --cpus_per_task option is used, could
    oversubscribe resources.
 -- In srun, do not implicitly set the job's maximum node count based upon a
    required hostlist.
 -- Avoid running the HealthCheckProgram on non-responding nodes rather than
    DOWN nodes.
 -- Fix bug in handling of poll() functions on OS X (SLURM was ignoring POLLIN
    if POLLHUP flag was set at the same time).
 -- Pulled Cray logic out of common/node_select.c into it's own
    select/cray plugin cons_res is the default.  To use linear add 'Linear' to
    SelectTypeParameters.
 -- Fixed bug where resizing jobs didn't correctly set used limits correctly.
 -- Change sched/backfill default time interval to 30 seconds and defer attempt
    to backfill schedule if slurmctld has more than 5 active RPCs. General
    improvements in logic scalability.
 -- Add SchedulerParameters option of default_sched_depth=# to control how
    many jobs on queue should be tested for attempted scheduling when a job
    completes or other routine events. Default value is 100 jobs. The full job
    queue is tested on a less frequent basis. This option can dramatically
    improve performance on systems with thousands of queued jobs.
 -- Gres/gpu now sets the CUDA_VISIBLE_DEVICES environment to control which
    GPU devices should be used for each job or job step and CUDA version 3.1+
    is used. NOTE: SLURM's generic resource support is still under development.
 -- Modify select/cons_res to pack jobs onto allocated nodes differently and
    minimize system fragmentation. For example on nodes with 8 CPUs each, a
    job needing 10 CPUs will now ideally be allocated 8 CPUs on one node and
    2 CPUs on another node. Previously the job would have ideally been
    allocated 5 CPUs on each node, fragmenting the unused resources more.
 -- Modified the behavior of update_job() in job_mgr.c to return when the first
    error is encountered instead of continuing with more job updates.
 -- Removed all references to the following slurm.conf parameters, all of which
    have been removed or replaced since version 2.0 or earlier: HashBase,
    HeartbeatInterval, JobAcctFrequency, JobAcctLogFile (instead use
    AccountingStorageLoc), JobAcctType, KillTree, MaxMemPerTask, and
    MpichGmDirectSupport.
 -- Fix bug in slurmctld restart logic that improperly reported jobs had
    invalid features: "Job 65537 has invalid feature list: fat".
 -- BLUEGENE - Removed thread pool for destroying blocks.  It turns out the
    memory leak we were concerned about for creating and destroying threads
    in a plugin doesn't exist anymore.  This increases throughput dramatically,
    allowing multiple jobs to start at the same time.
 -- BLUEGENE - Removed thread pool for starting and stopping jobs.  For similar
    reasons as noted above.
 -- BLUEGENE - Handle blocks that never deallocate.

* Changes in SLURM 2.2.0.pre9
=============================
 -- sbatch can now submit jobs to multiple clusters and run on the earliest
    available.
 -- Fix bug introduced in pre8 that prevented job dependencies and job
    triggers from working without the --enable-debug configure option.
 -- Replaced slurm_addr with slurm_addr_t
 -- Replaced slurm_fd with slurm_fd_t
 -- Skeleton code added for BlueGeneQ.
 -- Jobs can now be submitted to multiple partitions (job queues) and use the
    one permitting earliest start time.
 -- Change slurmdb_coord_table back to acct_coord_table to keep consistant
    with < 2.1.
 -- Introduced locking system similar to that in the slurmctld for the
    assoc_mgr.
 -- Added ability to change a users name in accounting.
 -- Restore squeue support for "%G" format (group id) accidentally removed in
    2.2.0.pre7.
 -- Added preempt_mode option to QOS.
 -- Added a grouping=individual for sreport size reports.
 -- Added remove_qos logic to jobs running under a QOS that was removed.
 -- scancel now exits with a 1 if any job is non-existant when canceling.
 -- Better handling of select plugins that don't exist on various systems for
    cross cluster communication.  Slurmctld, slurmd, and slurmstepd now only
    load the default select plugin as well.
 -- Better error handling when loading plugins.
 -- Prevent scontrol from aborting if getlogin() returns NULL.
 -- Prevent scontrol segfault when there are hidden nodes.
 -- Prevent srun segfault after task launch failure.
 -- Added job_submit/lua plugin.
 -- Fixed sinfo on a bluegene system to print correctly the output for:
    sinfo -e -o "%9P %6m %.4c %.22F %f"
 -- Add scontrol commands "hold" and "release" to simplify setting a job's
    priority to 0 or 1. Also tests that the job is in pending state.
 -- Increase maximum node list size (for incoming RPC) from 1024 bytes to 64k.
 -- In the backup slurmctld, purge triggers before recovering trigger state to
    avoid duplicate entries.
 -- Fix bug in sacct processing of --fields= option.
 -- Fix bug in checkpoint/blcr for jobs spanning multiple nodes introduced when
    changing some variable names in version 2.2.0.pre5.
 -- Removed the vestigal set_max_cluster_usage() function from the Priority
    Plugin API.
 -- Modify the output of "scontrol show job" for the field ReqS:C:T=. Fields
    not specified by the user will be reported as "*" instead of 65534.
 -- Added DefaultQOS option for an association.
 -- BLUEGENE - Added -B option to the slurmctld to clear created blocks from
    the system on start.
 -- BLUEGENE - Added option to scontrol & sview to recreate existing blocks.
 -- Fixed flags for returning messages to use the correct munge key when going
    cross-cluster.
 -- BLUEGENE - Added option to scontrol & sview to resume blocks in an error
    state instead of just freeing them.
 -- sview patched to allow multiple row selection of jobs, patch from Dan Rusak
 -- Lower default slurmctld server thread count from 1024 to 256. Some systems
    process threads on a last-in first-out basis and the high thread count was
    causing unexpectedly high delays for some RPCs.
 -- Added to sacctmgr the ability for admins to reset the raw usage of a user
    or account
 -- Improved the efficiency of a few lines in sacctmgr

* Changes in SLURM 2.2.0.pre8
=============================
 -- Add DebugFlags parameter of "Backfill" for sched/backfill detailed logging.
 -- Add DebugFlags parameter of "Gang" for detailed logging of gang scheduling
    activities.
 -- Add DebugFlags parameter of "Priority" for detailed logging of priority
    multifactor activities.
 -- Add DebugFlags parameter of "Reservation" for detailed logging of advanced
    reservations.
 -- Add run time to mail message upon job termination and queue time for mail
    message upon job begin.
 -- Add email notification option for job requeue.
 -- Generate a fatal error if the srun --relative option is used when not
    within an existing job allocation.
 -- Modify the meaning of InactiveLimit slightly. It will now cancel the job
    allocation created using the salloc or srun command if those commands
    cease responding for the InactiveLimit regardless of any running job steps.
    This parameter will no longer effect jobs spawned using sbatch.
 -- Remove AccountingStoragePass and JobCompPass from configuration RPC and
    scontrol show config command output. The use of SlurmDBD is still strongly
    recommended as SLURM will have limited database functionality or protection
    otherwise.
 -- Add sbatch options of --export and SBATCH_EXPORT to control which
    environment variables (if any) get propagated to the spawned job. This is
    particularly important for jobs that are submitted on one cluster and run
    on a different cluster.
 -- Fix bug in select/linear when used with gang scheduling and there are
    preempted jobs at the time slurmctld restarts that can result in over-
    subscribing resources.
 -- Added keeping track of the qos a job is running with in accounting.
 -- Fix for handling correctly jobs that resize, and also reporting correct
    stats on a job after it finishes.
 -- Modify gang scheduler so with SelectTypeParameter=CR_CPUS and task
    affinity is enabled, keep track of the individual CPUs allocated to jobs
    rather than just the count of CPUs allocated (which could overcommit
    specific CPUs for running jobs).
 -- Modify select/linear plugin data structures to eliminate underflow errors
    for the exclusive_cnt and tot_job_cnt variables (previously happened when
    slurmctld reconfigured while the job was in completing state).
 -- Change slurmd's working directory (and location of core files) to match
    that of the slurmctld daemon: the same directory used for log files,
    SlurmdLogFile (if specified with an absolute pathname) otherwise the
    directory used to save state, SlurmdSpoolDir.
 -- Add sattach support for the --pty option.
 -- Modify slurmctld communications logic to accept incoming messages on more
    than one port for improved scalability.
 -- Add SchedulerParameters option of "defer" to avoid trying to schedule a
    job at submission time, but to attempt scheduling many jobs at once for
    improved performance under heavy load.
 -- Correct logic controlling slurmctld thread limit eliminating check of
    RLIMIT_STACK.
 -- Make slurmctld's trigger logic more robust in the event that job records
    get purged before their trigger can be processed (e.g. MinJobAge=1).
 -- Add support for users to hold/release their own jobs (submit the job with
    srun/sbatch --hold/-H option or use "scontrol update jobid=# priority=0"
    to hold and "scontrol update jobid=# priority=1" to release).
 -- Added ability for sacct to query jobs by qos and a range of timelimits.
 -- Added ability for sstat to query pids of steps running.
 -- Support time specification in UTS format with a prefix of "uts" (e.g.
    "sbatch --begin=uts458389988 my.script").

* Changes in SLURM 2.2.0.pre7
=============================
 -- Fixed issue with sacctmgr if querying against non-existent cluster it
    works the same way as 2.1.
 -- Added infrastructure to support allocation of generic node resources (gres).
    -Modified select/linear and select/cons_res plugins to allocate resources
     at the level of a job without oversubcription.
    -Get sched/backfill operating with gres allocations.
    -Get gres configuration changes (reconfiguration) working.
    -Have job steps allocate resources.
    -Modified job step credential to include the job's and step's gres
     allocation details.
    -Integrate with HWLOC library to identify GPUs and NICs configured on each
     node.
 -- SLURM commands (squeue, sinfo, etc...) can now go cross-cluster on like
    linux systems.  Cross-cluster for bluegene to linux and such should
    work fine, even sview.
 -- Added the ability to configure PreemptMode on a per-partition basis.
 -- Change slurmctld's default thread limit count to 1024, but adjust that down
    as needed based upon the process's resource limits.
 -- Removed the non-functional "SystemCPU" and "TotalCPU" reporting fields from
    sstat and updated man page
 -- Correct location of apbasil command on Cray XT systems.
 -- Fixed bug in MinCPU and AveCPU calculations in sstat command
 -- Send message to srun when the Prolog takes too long (MessageTimeout) to
    complete.
 -- Change timeout for socket connect() to be half of configured MessageTimeout.
 -- Added high-throughput computing web page with configuration guidance.
 -- Use more srun sockets to process incoming PMI (MPICH2) connections for
    better scalability.
 -- Added DebugFlags for the select/bluegene plugin: DEBUG_FLAG_BG_PICK,
    DEBUG_FLAG_BG_WIRES, DEBUG_FLAG_BG_ALGO, and DEBUG_FLAG_BG_ALGO_DEEP.
 -- Remove vestigial job record field "kill_on_step_done" (internal to the
    slurmctld daemon only).
 -- For MPICH2 jobs: Clear PMI state between job steps.

* Changes in SLURM 2.2.0.pre6
=============================
 -- sview - added ability to see database configuration.
 -- sview - added ability to add/remove visible tabs.
 -- sview - change way grid highlighting takes place on selected objects.
 -- Added infrastructure to support allocation of generic node resources.
    -Added node configuration parameter of Gres=.
    -Added ability to view/modify a node's gres using scontrol, sinfo and sview.
    -Added salloc, sbatch and srun --gres option.
    -Added ability to view a job or job step's gres using scontrol, squeue and
     sview.
    -Added new configuration parameter GresPlugins to define plugins used to
     manage generic resources.
    -Added framework for gres plugins.
    -Added DebugFlags option of "gres" for detailed debugging of gres actions.
 -- Slurmd modified to log slow slurmstepd startup and note possible file system
    problem.
 -- sview - There is now a .slurm/sviewrc created when running sview.
    Defaults are put in there as to how sview looks when first launched.
    You can set these by Ctrl-S or Options->Set Default Settings.
 -- Add scontrol "wait_job <job_id>" option to wait for nodes to boot as needed.
    Useful for batch jobs (in Prolog, PrologSlurmctld or the script) if powering
    down idle nodes.
 -- Added salloc and sbatch option --wait-all-nodes. If set non-zero, job
    initiation will be delayed until all allocated nodes have booted. Salloc
    will log the delay with the messages "Waiting for nodes to boot" and "Nodes
    are ready for job".
 -- The Priority/mulitfactor plugin now takes into consideration size of job
    in cpus as well as size in nodes when looking at the job size factor.
    Previously only nodes were considered.
 -- When using the SlurmDBD messages waiting to be sent will be combined
    and sent in one message.
 -- Remove srun's --core option. Move the logic to an optional SPANK plugin
    (currently in the contribs directory, but plan to distribute through
    http://code.google.com/p/slurm-spank-plugins/).
 -- Patch for adding CR_CORE_DEFAULT_DIST_BLOCK as a select option to layout
    jobs using block layout across cores within each node instead of cyclic
    which was previously the default.
 -- Accounting - When removing associations if jobs are running, those jobs
    must be killed before proceeding.  Before the jobs were killed
    automatically thus causing user confusion on what is most likely an
    admin's mistake.
 -- sview - color column keeps reference color when highlighting.
 -- Configuration parameter MaxJobCount changed from 16-bit to 32-bit field.
    The default MaxJobCount was changed from 5,000 to 10,000.
 -- SLURM commands (squeue, sinfo, etc...) can now go cross-cluster on like
    linux systems.  Cross-cluster for bluegene to linux and such does not
    currently work.  You can submit jobs with sbatch.  Salloc and srun are not
    cross-cluster compatible, and given their nature to talk to actual compute
    nodes these will likely never be.
 -- salloc modified to forward SIGTERM to the spawned program.
 -- In sched/wiki2 (for Moab support) - Add GRES and WCKEY fields to MODIFYJOBS
    and GETJOBS commands. Add GRES field to GETNODES command.
 -- In struct job_descriptor and struct job_info: rename min_sockets to
    sockets_per_node, min_cores to cores_per_socket, and min_threads to
    threads_per_core (the values are not minimum, but represent the target
    values).
 -- Fixed bug in clearing a partition's DisableRootJobs value reported by
    Hongjia Cao.
 -- Purge (or ignore) terminated jobs in a more timely fashion based upon the
    MinJobAge configuration parameter. Small values for MinJobAge should improve
    responsiveness for high job throughput.

* Changes in SLURM 2.2.0.pre5
=============================
 -- Modify commands to accept time format with one or two digit hour value
    (e.g. 8:00 or 08:00 or 8:00:00 or 08:00:00).
 -- Modify time parsing logic to accept "minute", "hour", "day", and "week" in
    addition to the currently accepted "minutes", "hours", etc.
 -- Add slurmd option of "-C" to print actual hardware configuration and exit.
 -- Pass EnforcePartLimits configuration parameter from slurmctld for user
    commands to see the correct value instead of always "NO".
 -- Modify partition data structures to replace the default_part,
    disable_root_jobs, hidden and root_only fields with a single field called
    "flags" populated with the flags PART_FLAG_DEFAULT, PART_FLAG_NO_ROOT
    PART_FLAG_HIDDEN and/or PART_FLAG_ROOT_ONLY. This is a more flexible
    solution besides making for smaller data structures.
 -- Add node state flag of JOB_RESIZING. This will only exist when a job's
    accounting record is being written immediately before or after it changes
    size. This permits job accounting records to be written for a job at each
    size.
 -- Make calls to jobcomp and accounting_storage plugins before and after a job
    changes size (with the job state being JOB_RESIZING). All plugins write a
    record for the job at each size with intermediate job states being
    JOB_RESIZING.
 -- When changing a job size using scontrol, generate a script that can be
    executed by the user to reset SLURM environment variables.
 -- Modify select/linear and select/cons_res to use resources released by job
    resizing.
 -- Added to contribs foundation for Perl extension for slurmdb library.
 -- Add new configuration parameter JobSubmitPlugins which provides a mechanism
    to set default job parameters or perform other site-configurable actions at
    job submit time.
 -- Better postgres support for accounting, still beta.
 -- Speed up job start when using the slurmdbd.
 -- Forward step failure reason back to slurmd before in some cases it would
    just be SLURM_FAILURE returned.
 -- Changed squeue to fail when passed invalid -o <output_format> or
    -S <sort_list> specifications.

* Changes in SLURM 2.2.0.pre4
=============================
 -- Add support for a PropagatePrioProcess configuration parameter value of 2
    to restrict spawned task nice values to that of the slurmd daemon plus 1.
    This insures that the slurmd daemon always have a higher scheduling
    priority than spawned tasks.
 -- Add support in slurmctld, slurmd and slurmdbd for option of "-n <value>" to
    reset the daemon's nice value.
 -- Fixed slurm_load_slurmd_status and slurm_pid2jobid to work correctly when
    multiple slurmds are in use.
 -- Altered srun to set max_nodes to min_nodes if not set when doing an
    allocation to mimic that which salloc and sbatch do.  If running a step if
    the max isn't set it remains unset.
 -- Applied patch from David Egolf (David.Egolf@Bull.com). Added the ability
    to purge/archive accounting data on a day or hour basis, previously
    it was only available on a monthly basis.
 -- Add support for maximum node count in job step request.
 -- Fix bug in CPU count logic for job step allocation (used count of CPUS per
    node rather than CPUs allocated to the job).
 -- Add new configuration parameters GroupUpdateForce and GroupUpdateTime.
    See "man slurm.conf" for details about how these control when slurmctld
    updates its information of which users are in the groups allowed to use
    partitions.
 -- Added sacctmgr list events which will list events that have happened on
    clusters in accounting.
 -- Permit a running job to shrink in size using a command of
    "scontrol update JobId=# NumNodes=#" or
    "scontrol update JobId=# NodeList=<names>". Subsequent job steps must
    explicitly specify an appropriate node count to work properly.
 -- Added resize_time field to job record noting the time of the latest job
    size change (to be used for accounting purposes).
 -- sview/smap now hides hidden partitions and their jobs by default, with an
    option to display them.

* Changes in SLURM 2.2.0.pre3
=============================
 -- Refine support for TotalView partial attach. Add parameter to configure
    program of "--enable-partial-attach".