NEWS

This file describes changes in recent versions of SLURM. It primarily
documents those changes that are of interest to users and admins.

* 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.
 -- 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).

* Changes in SLURM 2.2.0.pre3
=============================
 -- Refine support for TotalView partial attach. Add parameter to configure
    program of "--enable-partial-attach".
 -- In select/cons_res, the count of CPUs on required nodes was formerly
    ignored in enforcing the maximum CPU limit. Also enforce maximum CPU
    limit when the topology/tree plugin is configured (previously ignored).
 -- In select/cons_res, allocate cores for a job using a best-fit approach.
 -- In select/cons_res, for jobs that can run on a single node, use a best-fit
    packing approach.
 -- Add support for new partition states of DRAIN and INACTIVE and new partition
    option of "Alternate" (alternate partition to use for jobs submitted to 
    partitions that are currently in a state of DRAIN or INACTIVE).
 -- Add group membership cache. This can substantially speed up slurmctld
    startup or reconfiguration if many partitions have AllowGroups configured.
 -- Added slurmdb api for accessing slurm DB information.
 -- In select/linear: Modify data structures for better performance and to 
    avoid underflow error messages when slurmctld restarts while jobs are
    in completing state.
 -- Added hash for slurm.conf so when nodes check in to the controller it can
    verify the slurm.conf is the same as the one it is running.  If not an
    error message is displayed.  To silence this message add NO_CONF_HASH
    to DebugFlags in your slurm.conf.
 -- Added error code ESLURM_CIRCULAR_DEPENDENCY and prevent circular job
    dependencies (e.g. job 12 dependent upon job 11 AND job 11 is dependent
    upon job 12).
 -- Add BootTime and SlurmdStartTime to available node information.
 -- Fixed moab_2_slurmdb to work correctly under new database schema.
 -- Slurmd will drain a compute node when the SlurmdSpoolDir is full.

* Changes in SLURM 2.2.0.pre2
=============================
 -- Add support for spank_get_item() to get S_STEP_ALLOC_CORES and 
    S_STEP_ALLOC_MEM. Support will remain for S_JOB_ALLOC_CORES and 
    S_JOB_ALLOC_MEM. 
 -- Kill individual job steps that exceed their memory limit rather than 
    killing an entire job if one step exceeds its memory limit.
 -- Added configuration parameter VSizeFactor to enforce virtual memory limits 
    for jobs and job steps as a percentage of their real memory allocation.
 -- Add scontrol ability to update job step's time limits.
 -- Add scontrol ability to update job's NumCPUs count.
 -- Add --time-min options to salloc, sbatch and srun. The scontrol command 
    has been modified to display and modify the new field. sched/backfill
    plugin has been changed to alter time limits of jobs with the 
    --time-min option if doing so permits earlier job initiation.
 -- Add support for TotalView symbol MPIR_partial_attach_ok with srun support
    to release processes which TotalView does not attach to.
 -- Add new option for SelectTypeParameters of CR_ONE_TASK_PER_CORE. This 
    option will allocate one task per core by default. Without this option, 
    by default one task will be allocated per thread on nodes with more than 
    one ThreadsPerCore configured.
 -- Avoid accounting separately for a current pid corresponds to a Light Weight
    Process (Thread POSIX) appearing in the /proc directory. Only account for
    the original process (pid==tgid) to avoid accounting for memory use more 
    than once.
 -- Add proctrack/cgroup plugin which uses Linux control groups (aka cgroup)
    to track processes on Linux systems having this feature enabled (kernel
    >= 2.6.24).
 -- Add logging of license transations including job_id.
 -- Add configuration parameters SlurmSchedLogFile and SlurmSchedLogLevel to
    support writing scheduling events to a separate log file.
 -- Added contribs/web_apps/chart_stats.cgi, a web app that invokes sreport to
    retrieve from the accounting storage db a user's request for job usage or
    machine utilization statistics and charts the results to a browser.
 -- Massive change to the schema in the storage_accounting/mysql plugin.  When
    starting the slurmdbd the process of conversion may take a few minutes.
    You might also see some errors such as 'error: mysql_query failed: 1206
    The total number of locks exceeds the lock table size'.  If you get this,
    do not worry, it is because your setting of innodb_buffer_pool_size in
    your my.cnf file is not set or set too low.  A decent value there should
    be 64M or higher depending on the system you are running on.  See
    RELEASE_NOTES for more information.  But setting this and then
    restarting the mysqld and slurmdbd will put things right.  After this
    change we have noticed 50-75% increase in performance with sreport and
    sacct.
 -- Fix for MaxCPUs to honor partitions of 1 node that have more than the
    maxcpus for a job.
 -- Add support for "scontrol notify <message>" to work for batch jobs.

* Changes in SLURM 2.2.0.pre1
=============================
 -- Added RunTime field to scontrol show job report
 -- Added SLURM_VERSION_NUMBER and removed SLURM_API_VERSION from 
    slurm/slurm.h.
 -- Added support to handle communication with SLURM 2.1 clusters.  Job's
    should not be lost in the future when upgrading to higher versions of 
    SLURM.
 -- Added withdeleted options for listing clusters, users, and accounts
 -- Remove PLPA task affinity functions due to that package being deprecated.
 -- Preserve current partition state information and node Feature and Weight 
    information rather than use contents of slurm.conf file after slurmctld 
    restart with -R option or SIGHUP. Replace information with contents of 
    slurm.conf after slurmctld restart without -R or "scontrol reconfigure".
    See RELEASE_NOTES file fore more details.
 -- Modify SLURM's PMI library (for MPICH2) to properly execute an executable
    program stand-alone (single MPI task launched without srun).
 -- Made GrpCPUs and MaxCPUs limits work for select/cons_res.
 -- Moved all SQL dependant plugins into a seperate rpm slurm-sql.  This
    should be needed only where a connection to a database is needed (i.e.
    where the slurmdbd is running)
 -- Add command line option "no_sys_info" to PAM module to supress system 
    logging of "access granted for user ...", access denied and other errors
    will still be logged.
 -- sinfo -R now has the user and timestamp in separate fields from the reason.
 -- Much functionality has been added to account_storage/pgsql.  The plugin
    is still in a very beta state.  It is still highly advised to use the
    mysql plugin, but if you feel like living on the edge or just really
    like postgres over mysql for some reason here you go. (Work done
    primarily by Hongjia Cao, NUDT.)

* Changes in SLURM 2.1.6
========================
 -- For newly submitted jobs, report expected start time in squeue --start as
    "N/A" rather than current time.
 -- Correct sched/backfill logic so that it runs in a more timely fashion.
 -- Fixed issue if running on accounting cache and priority/multifactor to
    initialize the root association when the database comes back up.
 -- Emulated BLUEGENE - fixed issue where blocks weren't always created
    correctly when loading from state.  This does not apply to a real
    bluegene system, only emulated.
 -- Fixed bug when job is completing where you could get cpu_cnt underflow on
    completing jobs.

* Changes in SLURM 2.1.5
========================
 -- BLUEGENE - Fixed display of draining nodes for sinfo -R.
 -- Fixes to scontrol and sview when setting a job to an impossible start time.
 -- Added -h to srun for help.
 -- Fix for sacctmgr man page to remove erroneous 'with' statements.
 -- Fix for unpacking jobs with accounting statistics, previously it appears
    only steps were unpacked correctly, for the most case sacct would only
    display this information making this fix a very minor one.
 -- Changed scontrol and sview output for jobs with unknown end times from
    'NONE' to 'Unknown'.
 -- Fixed mysql plugin to reset classification when adding a
    previously deleted cluster.
 -- Permit a batch script to reset umask and have that propagate to tasks
    spawed by subsequent srun. Previously the umask in effect when sbatch was
    executed was propagated to tasks spawed by srun.
 -- Modify slurm_job_cpus_allocated_on_node_id() and 
    slurm_job_cpus_allocated_on_node() functions to not write explanation of 
    failures to stderr. Only return -1 and set errno.
 -- Correction in configurator.html script. Prolog and Epilog were reversed.
 -- BLUEGENE - Fixed race condition where if a nodecard has an error on an
    un-booted block when a job comes to use it before the state checking
    thread notices it which could cause the slurmctld to lock up on a
    non-dynamic system.
 -- In select/cons_res with FastSchedule=0 and Procs=# defined for the node, 
    but no specific socket/core/thread count configured, avoid fatal error if 
    the number of cores on a node is less than the number of Procs configured.
 -- Added ability for the perlapi to utilize opaque data types returned from
    the C api.
 -- BLUEGENE - made the perlapi get correct values for cpus per node,
    Previously it would give the number of cpus per cnode instead of midplane.
 -- BLEUGENE - Fixed issue where if a block being selected for a job to use
    and during the process a hardware failure happens, previously the block
    would still be allowed to be used which would fail or requeue the job
    depending on the configuration.
 -- For SPANK job environment, avoid duplicate "SPANK_" prefix for environment
    set by sbatch jobs.
 -- Make squeue select jobs on hidden partitions when requesting more than one.
 -- Avoid automatically cancelling job steps when all of the tasks on some node
    have gracefully terminated.

* Changes in SLURM 2.1.4
========================
 -- Fix for purge script in accounting to use correct options.
 -- If SelectType=select/linear and SelectTypeParameters=CR_Memory fix bug that
    would fail to release memory reserved for a job if "scontrol reconfigure" 
    is executed while the job is in completing state.
 -- Fix bug in handling event trigger for job time limit while job is still 
    in pending state.
 -- Fixed display of Ave/MaxCPU in sacct for jobs. Steps were printed
    correctly.
 -- When node current features differs from slurm.conf, log the node names
    using a hostlist expression rather than listing individual node names.
 -- Improve ability of srun to abort job step for some task launch failures.
 -- Fix mvapich plugin logic to release the created job allocation on 
    initialization failure (previously the failures would cancel job step, 
    but retain job allocation).
 -- Fix bug in srun for task count so large that it overflows int data type.
 -- Fix important bug in select/cons_res handling of ntasks-per-core parameter
    that was uncovered by a bug fixed in v2.1.3. Bug produced fatal error for
    slurmctld: "cons_res: cpus computation error".
 -- Fix bug in select/cons_res handling of partitions configured with 
    Shared=YES. Prior logic failed to support running multiple jobs per node.

* Changes in SLURM 2.1.3-2
==========================
 -- Modified spec file to obsolete pam_slurm when installing
    the slurm-pam_slurm rpm.

* Changes in SLURM 2.1.3-1
==========================
 -- BLUEGENE - Fix issues on static/overlap systems where if a midplane
    was drained you would not be able to create new blocks on it.
 -- In sched/wiki2 (for Moab): Add excluded host list to job information
    using new keyword "EXCLUDE_HOSTLIST".
 -- Correct slurmd reporting of incorrect socket/core/thread counts.  
 -- For sched/wiki2 (Moab): Do not extend a job's end time for suspend/resume
    or startup delay due to node boot time. A job's end time will always be
    its start time plus time limit.
 -- Added build-time option (to configure program) of --with-pam_dir to 
    specify the directory into which PAM modules get installed, although it
    should pick the proper directory by default. "make install" and "rpmbuild"
    should now put the pam_slurm.so file in the proper directory.
 -- Modify PAM module to link against SLURM API shared library and use exported
    slurm_hostlist functions.
 -- Do not block new jobs with --immediate option while another job is in the
    process of being requeued (which can take a long time for some node failure
    modes).
 -- For topology/tree, log invalid hostnames in a single hostlist expression
    rather than one per line.
 -- A job step's default time limit will be UNLIMITED rather than partition's 
    default time limit. The step will automatically be cancelled as part of the
    job termination logic when the job's time limit is reached.
 -- sacct - fixed bug when checking jobs against a reservation
 -- In select/cons_res, fix support for job allocation with --ntasks_per_node
    option. Previously could allocate too few CPUs on some nodes.  
 -- Adjustment made to init message to the slurmdbd to allow backwards
    compatibility with future 2.2 release. YOU NEED TO UPGRADE SLURMDBD
    BEFORE ANYTHING ELSE.
 -- Fix accounting when comment of down/drained node has double quotes in it.

* Changes in SLURM 2.1.2
========================
 -- Added nodelist to sview for jobs on non-bluegene systems
 -- Correction in value of batch job environment variable SLURM_TASKS_PER_NODE
    under some conditions.
 -- When a node silently fails which is already drained/down the reason
    for draining for the node is not changed.
 -- Srun will ignore SLURM_NNODES environment variable and use the count of 
    currently allocated nodes if that count changes during the job's lifetime 
    (e.g. job allocation uses the --no-kill option and a node goes DOWN, job 
    step would previously always fail).
 -- Made it so sacctmgr can't add blank user or account.  The MySQL plugin
    will also reject such requests.
 -- Revert libpmi.so version for compatibility with SLURM version 2.0 and
    earlier to avoid forcing applications using a specific libpmi.so version to
    rebuild unnecessarily (revert from libpmi.so.21.0.0 to libpmi.so.0.0.0).
 -- Restore support for a pending job's constraints (required node features) 
    when slurmctld is restarted (internal structure needed to be rebuilt).
 -- Removed checkpoint_blcr.so from the plugin rpm in the slurm.spec since
    it is also in the blcr rpm.
 -- Fixed issue in sview where you were unable to edit the count
    of jobs to share resources.
 -- BLUEGENE - Fixed issue where tasks on steps weren't being displayed
    correctly with scontrol and sview.
 -- BLUEGENE - fixed wiki2 plugin to report correct task count for pending 
    jobs.
 -- BLUEGENE - Added /etc/ld.so.conf.d/slurm.conf to point to the
    directory holding libsched_if64.so when building rpms.
 -- Adjust get_wckeys call in slurmdbd to allow operators to list wckeys.

* Changes in SLURM 2.1.1
========================
 -- Fix for case sensitive databases when a slurmctld has a mixed case
    clustername to lower case the string to easy compares.
 -- Fix squeue if job is completing and failed to print remaining
    nodes instead of failed message.
 -- Fix sview core when searching for partitions by state.
 -- Fixed setting the start time when querying in sacct to the
    beginning of the day if not set previously.
 -- Defined slurm_free_reservation_info_msg and slurm_free_topo_info_msg
    in common/slurm_protocol_defs.h
 -- Avoid generating error when a job step includes a memory specification and 
    memory is not configured as a consumable resource.
 -- Patch for small memory leak in src/common/plugstack.c
 -- Fix sview search on node state.
 -- Fix bug in which improperly formed job dependency specification can cause
    slurmctld to abort.
 -- Fixed issue where slurmctld wouldn't always get a message to send cluster
    information when registering for the first time with the slurmdbd.
 -- Add slurm_*_trigger.3 man pages for event trigger APIs.
 -- Fix bug in job preemption logic that would free allocated memory twice.
 -- Fix spelling issues (from Gennaro Oliva)
 -- Fix issue when changing parents of an account in accounting all childern
    weren't always sent to their respected slurmctlds until a restart.
 -- Restore support for srun/salloc/sbatch option --hint=nomultithread to 
    bind tasks to cores rather than threads (broken in slurm v2.1.0-pre5).
 -- Fix issue where a 2.0 sacct could not talk correctly to a 2.1 slurmdbd.
 -- BLUEGENE - Fix issue where no partitions have any nodes assigned them to
    alert user no blocks can be created.
 -- BLUEGENE - Fix smap to put BGP images when using -Dc on a Blue Gene/P 
    system.
 -- Set SLURM_SUBMIT_DIR environment variable for srun and salloc commands to
    match behavior of sbatch command.
 -- Report WorkDir from "scontrol show job" command for jobs launched using
    salloc and srun.
 -- Update correctly the wckey when changing it on a pending job.
 -- Set wckeyid correctly in accounting when cancelling a pending job.
 -- BLUEGENE - critical fix where jobs would be killed incorrectly.
 -- BLUEGENE - fix for sview putting multiple ionodes on to nodelists when
    viewing the jobs tab.

* Changes in SLURM 2.1.0
========================
 -- Improve sview layout of blocks in use.
 -- A user can now change the dimensions of the grid in sview.
 -- BLUEGENE - improved startup speed further for large numbers of defined
    blocks
 -- Fix to _get_job_min_nodes() in wiki2/get_jobs.c suggested by Michal Novotny
 -- BLUEGENE - fixed issues when updating a pending job when a node 
    count was incorrect for the asked for connection type.
 -- BLUEGENE - fixed issue when combining blocks that are in ready states to
    make a larger block from those or make multiple smaller blocks by
    splitting the larger block.  Previously this would only work with block
    in a free state.
 -- Fix bug in wiki(2) plugins where if HostFormat=2 and the task list is
    greater than 64 we don't truncate.  Previously this would mess up Moab
    by sending a truncated task list when doing a get jobs.
 -- Added update slurmctld debug level to sview when in admin mode.
 -- Added logic to make sure if enforcing a memory limit when using the
    jobacct_gather plugin a user can no longer turn off the logic to enforce
    the limit.
 -- Replaced many calls to getpwuid() with reentrant uid_to_string()
 -- The slurmstepd will now refresh it's log file handle on a reconfig,
    previously if a log was rolled any output from the stepd was lost.

* Changes in SLURM 2.1.0-pre9
=============================
 -- Added the "scontrol update SlurmctldDebug" as the preferred alternative to
    the "scontrol setdebug" command.
 -- BLUEGENE - made it so when removing a block in an error state the nodes in
    the block are set correctly in accounting as not in error.
 -- Fixed issue where if slurmdbd is not up qos' are set up correctly for
    associations off of cache.
 -- scontrol, squeue, sview all display the correct node, cpu count along with
    correct corresponding nodelist on completing jobs.
 -- Patch (Mark Grondona) fixes serious security vulnerability in SLURM in
    the spank_job_env functionality.
 -- Improve spank_job_env interface and documentation
 -- Add ESPANK_NOT_LOCAL error code to spank_err_t
 -- Made the #define DECAY_INTERVAL used in the priority/multifactor plugin
    a slurm.conf variable (PriorityCalcPeriod)
 -- Added new macro SLURM_VERSION for use in autoconf scripts to determine
    current version of slurm installed on system when building against the api.
 -- Patch from Matthieu Hautreux that adds an entry into the error file when
    a job or step receives a TERM or KILL signal.
 -- Make it so env var SLURM_SRUN_COMM_HOST is overwritten if already in 
    existence in the slurmd.

* Changes in SLURM 2.1.0-pre8
=============================
 -- Rearranged the "scontrol show job" output into functional groupings
 -- Change the salloc/sbatch/srun -P option to -d (dependency)
 -- Removed the srun -d option; must use srun --slurmd-debug instead
 -- When running the mysql plugin natively MUNGE errors are now eliminated 
    when sending updates to slurmctlds.
 -- Check to make sure we have a default account before looking to 
    fill in default association. 
 -- Accounting - Slurmctld and slurmdbd will now set uids of users which were 
    created after the start of the daemons on reconfig.  Slurmdbd will 
    attempt to set previously non-existant uids every hour.
 -- Patch from Aaron Knister and Mark Grondona, to parse correctly quoted 
    #SBATCH options in a batch script.
 -- job_desc_msg_t - in, out, err have been changed to std_in, std_out, 
    and std_err respectfully.  Needed for PySLURM, since Python sees (in) 
    as a keyword.
 -- Changed the type of addr to struct sockaddr_in in _message_socket_accept()
    in sattach.c, step_launch.c, and allocate_msg.c, and moved the function 
    into a common place for all the calls since the code was very similar.
 -- proctrack/lua support has been added see contribs/lua/protrack.lua
 -- replaced local gtk m4 test with AM_PATH_GTK_2_0
 -- changed AC_CHECK_LIB to AC_SEARCH_LIBS to avoid extra libs in
    compile lines.
 -- Patch from Matthieu Hautreux to improve error message in slurmd/req.c
 -- Added support for split groups from (Matthiu Hautreux CEA)
 -- Patch from Mark Grondona to move blcr scripts into pkglibexecdir
 -- Patch from Doug Parisek to calculate a job's projected start time under the
    builtin scheduler.
 -- Removed most global variables out of src/common/jobacct_common.h

* Changes in SLURM 2.1.0-pre7
=============================
 -- BLUEGENE - make 2.1 run correctly on a real bluegene cluster
 -- sacctmgr - Display better debug for when an admin specifies a non-existant 
    parent account when changing parent accounts.
 -- Added a mechanism to the slurmd to defer the epilog from starting until
    after a running prolog has finished.
 -- If a node reboots inbetween checking status the node is marked down unless 
    ReturnToService=2
 -- Added -R option to slurmctld to recover partition state also when 
    restarting or reconfiguring.
 
* Changes in SLURM 2.1.0-pre6
=============================
 -- When getting information about nodes in hidden partitions, return a node
    name of NULL rather than returning no information about the node so that 
    node index information is still valid.
 -- When querying database for jobs in certain state and a time period is 
    given only jobs in that state during the period will be returned,
    previously if a time period was given in sacct jobs eligible to run or 
    running would be displayed, which is still the default if no states are 
    requested.
 -- One can now query jobs based on size (nodes and or cpus) (mysql plugin only)
 -- Applied patch from Mark Grondona that tests for a missing config file before
    any other processing in spank_init().  This now prevents fatal errors from
    being mistakenly treated as recoverable.
 -- --enable-debug no longer has to be stated at configure time to have 
    the slurmctld or slurmstepd dump core on a seg fault.
 -- Moved the errant slurm_job_node_ready() declaration from job_info.h to
    slurm.h and deleted job_info.h.
 -- Added the slurm_job_cpus_allocated_on_node_id() 
    slurm_job_cpus_allocated_on_node() API for working with the 
    job_resources_t structure.
 -- BLUEGENE - speed up start up for systems that have many blocks (100+)
    configured on the system.

* Changes in SLURM 2.1.0-pre5
=============================
 -- Add squeue option "--start" to report expected start time of pending jobs.
 -- Sched/backfill plugin modified to set expected start time of pending jobs.
 -- Add SchedulerParameters option of "max_job_bf=#" to control how far down
    the queue of pending jobs that SLURM searches in an attempt backfill 
    schedule them. The default value is 50 jobs.
 -- Fixed cause of squeue -o "%C" seg fault.
 -- Add -"-signal=<int>@<time>" option to salloc, sbatch and srun commands to
    notify programs before reaching the end of their time limit.
 -- Add scontrol option to update a running job's EndTime (also resets the 
    job's time limit).
 -- Add new job wait reason, ReqNodeNotAvail: Required node is not available 
    (down or drained).
 -- Log when slurmctld or slurmd are started with small core file limit.
 -- Permit job's owner to change features, processor count, minimum and 
    maximun node counts of pending jobs (the operation was previously 
    restricted to user root)
 -- Applied patch from Chuck Clouston for scontrol man page with clarifications
    and additional info
 -- Change slurm errno name from ESLURM_TOO_MANY_REQUESTED_NODES to 
    ESLURM_INVALID_NODE_COUNT to better reflect its meaning.
 -- Fix bug in sched/backfill which could result in invalid memory reference
    when trying to schedule jobs submitted with --exclude option.
 -- Fix for slurmctld deadlock at startup with PreemptMode=SUSPEND,GANG.
 -- Added preemption plugins to RPM.
 -- Completely disable logging of sched/wiki and sched/wiki2 (Maui & Moab) 
    message traffic unless DebugFlag=Wiki is configured.
 -- Change scontrol show job info: ReqProcs (number of processors requested) 
    is replaced by NumProcs (number of processors requested or actually 
    allocated) and ReqNodes (number of nodes requested) is replaced by 
    NumNodes (number of nodes requested or actually allocated).
 -- Fixed issue when max nodes wasn't specified and was later set by limit 
    to not request that as the actual maximum.
 -- Move job preemption (for requeue, checkpoint and kill modes only) out of
    gang scheduling module. Make identification of preemptable jobs an argument
    to the select_g_job_test function rather than calling preempt plugin from
    the select plugin. Make output of srun --test-only option include a list
    of preempted job IDs. 
 -- Better record keeping for front end systems when registering.
 -- Enable memory allocation logic for jobs step (i.e. allocate resources
    within the job's memory allocation and enforce limits).
 -- handle error state in sinfo
 -- sview and "scontrol show config" now report as SLURM_VERSION the version 
    of slurmctld rather than that of the command.
 -- Change SuspendTime configuration parameter from 16-bits to 32-bits.
 -- Add environment variable support to sattach, salloc, sbatch and srun
    to permit user control over exit codes so application exit codes can be
    distiguished from those generated by SLURM. SLURM_EXIT_ERROR specifies the
    exit code when a SLURM error occurs. SLURM_EXIT_IMMEDIATE specifies the 
    exit code when the --immediate option is specified and resources are not
    available. Any other non-zero exit code would be that of the application
    run by SLURM.
 -- Added a Quality of Service (QOS) html page.
 -- In sched/wiki2, JOBWILLRUN command, add support for identification of 
    preemptable and preempted jobs (both new and old format of commands are
    supported).
 -- Remove contribs/python/hostlist files. Download the materials as needed
    directly from http://www.nsc.liu.se/~kent/python-hostlist.
 -- BLUEGENE - Preemption now works on bluegene systems
 -- For salloc, sbatch and srun commands, ignore _maximum_ values for
    --sockets-per-node, --cores-per-socket and --threads-per-core options.
    Remove --mincores, --minsockets, --minthreads options (map them to 
    minimum values of -sockets-per-node, --cores-per-socket and 
    --threads-per-core for now).

* Changes in SLURM 2.1.0-pre4
=============================
 -- Move processing of node configuration information in slurm.conf and 
    topology information in topology.conf from slurmctld into common and load 
    that information into slurmd. Use it to set environment variables for jobs
    SLURM_TOPOLOGY_ADDR and SLURM_TOPOLOGY_ADDR_PATTERN describing the network
    topology for each task. Based upon patch from Mattheu Hautreux (CEA).
 -- Correction in computing a job's TotalProcs value when ThreadsPerCore>1 and
    allocating by cores or sockets.

* Changes in SLURM 2.1.0-pre3
=============================
 -- Removed sched/gang plugin and moved the logic directly into the slurmctld
    daemon so that job preemption and gang scheduling can be used with the
    sched/backfill plugin. Added configuration parameter:
    PreemptMode=gang|off|suspend|cancel|requeue|checkpoint 
    to enable/disable gang scheduling and job preemption logic (both are 
    disabled by default).
    (NOTE: There are some problems with memory management which could prevent a
    job from starting when memory would be freed by a job being requeued or 
    otherwise removed, these are being worked on)
 -- Added PreemptType configuration parameter to identify preemptable jobs.
    Former users of SchedType=sched/gang should set SchedType=sched/backfill,
    PreemptType=preempt/partition_prio and PreemptMode=gang,suspend. See
    web and slurm.conf man page for other options.
    PreemptType=preempt/qos uses Quality Of Service information in database.
 -- In select/linear, optimize job placement across partitions.
 -- If the --partition option is used with the sinfo or squeue command then
    print information about even hidden partitions.
 -- Replaced misc cpu allocation members in job_info_t with select_job_res_t
    which will only be populated when requested (show_flags & SHOW_DETAIL)
 -- Added a --detail option to "scontrol show job" to display the cpu/mem
    allocation info on a node-by-node basis.
 -- Added logic to give correct request uid for individual steps that 
    were cancelled.
 -- Created a spank_get_item() option (S_JOB_ALLOC_MEM) that conveys the memory
    that the select/cons_res plugin has allocated to a job.
 -- BLUEGENE - blocks in error state are now handled correctly in accounting.
 -- Modify squeue to print job step information about a specific job ID using
    the following syntax: "squeue -j <job_id> -s".
 -- BLUEGENE - scontrol delete block and update block can now remove blocks 
    on dynamic laid out systems.
 -- BLUEGENE - Vastly improve Dynamic layout mode algorithm.
 -- Address some issues for SLURM support of Solaris.
 -- Applied patch from Doug Parisek (Doug.Parisek@bull.com) for speeding up 
    start of sview by delaying to creation of tooltips until requested.
 -- Changed GtkToolTips to GtkToolTip for newer versions of GTK.
 -- Applied patch from Rod Schultz (Rod.Schultz@Bull.com) that eliminates
    ambiguity in the documentation over use of the terms "CPU" and "socket".
 -- Modified get_resource_arg_range() to return full min/max values when input
    string is null.  This fixes the srun -B option to function as documented.
 -- If the job, node, partition, reservation or trigger state file is missing 
    or too small, automatically try using the previously saved state (file 
    name with ".old" suffix).
 -- Set a node's power_up/configuring state flag while PrologSlurmctld is
    running for a job allocated to that node.
 -- If PrologSlurmctld has a non-zero exit code, requeue the job or kill it.
 -- Added sacct ability to use --format NAME%LENGTH similar to sacctmgr.
 -- Improve hostlist logic for multidimensional systems.
 -- The pam_slurm Pluggable Authentication Module for SLURM previously
    distributed separately has been moved within the main SLURM distribution
    and is packaged as a separate RPM.
 -- Added configuration parameter MaxTasksPerNode.
 -- Remove configuration parameter SrunIOTimeout.
 -- Added functionality for sacctmgr show problems.  Current problems include
    Accounts/Users with no associations, Accounts with no users or subaccounts
    attached in a cluster, and Users with No UID on the system.
 -- Added new option for sacctmgr list assoc and list cluster WOLimits.  This 
    gives a smaller default format without the limit information.  This may 
    be the new default for list assocations and list clusters.
 -- Users are now required to have an association with there default account.
    Sacctmgr will now complain when you try to modify a users default account
    which they are not associated anywhere.
 -- Fix select/linear bug resulting in run_job_cnt underflow message if a 
    suspended job is cancelled.
 -- Add test for fsync() error for state save files. Log and retry as needed.
 -- Log fatal errors from slurmd and slurmctld to syslog.
 -- Added error detection and cleanup for the case in which a compute node is 
    rebooted and restarts its slurmd before its "down" state is noticed.
 -- BLUEGENE systems only - remove vestigal start location from jobinfo.
 -- Add reservation flag of "OVERLAP" to permit a new reservation to use
    nodes already in another reservation.
 -- Fix so "scontrol update jobid=# nice=0" can clear previous nice value.
 -- BLUEGENE - env vars such as SLURM_NNODES, SLURM_JOB_NUM_NODES, and
    SLURM_JOB_CPUS_PER_NODE now reference cnode counts instead of midplane
    counts.  SLURM_NODELIST still references midplane names.
 -- Added qos support to salloc/sbatch/srun/squeue
 -- Added to scancel the ability to select jobs by account and qos
 -- Recycled the "-A" argument indicate "account" for all the commands that
    accept the --account argument (srun -A to allocate is no longer supported.)
 -- Change sbatch response from "sbatch: Submitted batch job #" written to 
    stderr to "Submitted batch job #" written to stdout.
 -- Made shutdown and cleanup a little safer for the mvapich and mpich1_p4
    plugins.
 -- QOS support added with limits, priority and preemption
    (no documentation yet).
 -- If a slurmd does not have a node listed in it's slurm.conf (slurm.conf's 
    should be kept the same on all nodes) an error message is printed in the 
    slurmctld log along with the message already being printed in the slurmd 
    log for easier debugging.

* Changes in SLURM 2.1.0-pre2
=============================
 -- Added support for smap to query off node name for display.
 -- Slurmdbd modified to set user ID and group ID to SlurmUser if started as 
    user root.
 -- Configuration parameter ControlMachine changed to  accept multiple comma-
    separated hostnames for support of some high-availability architectures.
 -- ALTERED API CALL slurm_get_job_steps 0 has been changed to NO_VAL for both
    job and step id to recieve all jobs/steps.  Please make adjustments to
    your code.
 -- salloc's --wait=<secs> option deprecated by --immediate=<secs> option to 
    match the srun command.
 -- Add new slurmctld list for node features with node bitmaps for simplified
    scheduling logic.
 -- Multiple features can be specified when creating a reservation. Use "&" 
    (AND) or "|" (OR) separators between the feature names.
 -- Changed internal node name caching so that front-end mode would work with
    multiple lines of node name definitions. 
 -- Add node state flag for power-up/configuring. Represented by "#" suffix
    on the node state name (e.g. "ALLOCATED#") for command output.
 -- Add CONFIGURING/CF job state flag for node power-up/configuring.
 -- Modify job step cancel logic for scancel and srun (on reciept of SIGTERM 
    or three SIGINT) to immediately send SIGKILL to spawned tasks.  Previous 
    logic would send SIGCONT, SIGTERM, wait KillWait seconds, SIGKILL.
 -- Created a spank_get_item() option (S_JOB_ALLOC_CORES) that conveys the cpus
    that the select/cons_res plugin has allocated to a job.
 -- Improve sview performance (outrageously) on very large machines.
 -- Add support for licenses in resource reservation.
 -- BLUEGENE - Jobs waiting for a block to boot will now be in Configuring
    state. 
 -- bit_fmt now does not return brackets surrounding any set of data.

* Changes in SLURM 2.1.0-pre1
=============================
 -- Slurmd notifies slurmctld of node boot time to better clean up after node
    reboots.
 -- Slurmd sends node registration information repeatedly until successful
    transmit.
 -- Change job_state in job structure to dedicate 8-bits to state flags. 
    Added macros to get state information (IS_JOB_RUNNING(job_ptr), etc.)
 -- Added macros to get node state information (IS_NODE_DOWN(node_ptr), etc).
 -- Added support for Solaris. Patch from David Hoppner.
 -- Rename "slurm-aix-federation-<version>.rpm" to just 
    "slurm-aix-<version>.rpm" (federation switch plugin may not be present).
 -- Eliminated the redundant squeue output format and sort options of 
    "%o" and "%b". Use "%D" and "%S" formats respectively. Also eliminated 
    "%X" and "%Y" and "%Z" formats. Use "%z" instead.
 -- Added mechanism for SPANK plugins to set environment variables for
    Prolog, Epilog, PrologSLurmctld and EpilogSlurmctld programs using
    the functions spank_get_job_env, spank_set_job_env, and 
    spank_unset_job_env. See "man spank" for more information.
 -- Completed the work to begun in 2.0.0 to standardize on using '-Q' as the
    --quiet flag for all the commands.
 -- BLUEGENE - sinfo and sview now display correct cpu counts for partitions
 -- Cleaned up the cons_res plugin.  It now uses a ptr to a part_record
    instead of having to do strcmp's to find the correct one.
 -- Pushed most all the plugin specific info in src/common/node_select.c 
    into the respected plugin.
 -- BLUEGENE - closed some corner cases where a block could had been removed 
    while a job was waiting for it to become ready because an underlying 
    part of the block was put into an error state.
 -- Modify sbcast logic to prevent a user from moving files to nodes they
    have not been allocated (this would be possible in previous versions
    only by hacking the sbcast code).
 -- Add contribs/sjstat script (Perl tool to report job state information).
    Put into new RPM: sjstat.
 -- Add sched/wiki2 (Moab) JOBMODIFY command support for VARIABLELIST option
    to set supplemental environment variables for pending batch jobs.
 -- BLUEGENE - add support for scontrol show blocks.
 -- Added support for job step time limits.

* Changes in SLURM 2.0.10
=========================

* Changes in SLURM 2.0.9
========================
 -- When running the mysql plugin natively MUNGE errors are now eliminated 
    when sending updates to slurmctlds.
 -- Check to make sure we have a default account before looking to 
    fill in default association. 
 -- Fix to make it so sched/wiki2 can modify a job's partition or hostlist of 
    non-pending jobs.
 -- Applied slurmctld prolog bug fix from Dennis Leepow to backfill.c
 -- fixed quite a few typos (needed for debian packages)
 -- make it so slurmctld will core dump without --enable-debug set
 -- Fix issue when doing a rollup on reservations before a cluster has been 
    added. 
 -- MySQL plugin - When doing archiving end time is now decreased by 1 
    which should be more correct.
 -- BLUEGENE - Fixed issue where --no-rotate didn't work correctly on job
    submissions.
 -- BLUEGENE - made the buffer longer when submitting jobs to get the entire 
    line.  Previously the line could be shortened prematurely.
 -- BLUEGENE - Fix to make sure we don't erroneously set a connection type
    to SMALL.
 -- Type cast a negative uint64_t to int64_t to avoid confusion when doing 
    arithmetic with it in accounting dealing with over commit time.

* Changes in SLURM 2.0.8
========================
 -- BLUEGENE - added dub2 of stderr to put error messages sent from underlying 
    libraries of the bridge api to the bridgeapi.log
 -- Fixed issue with sacctmgr when modifing a user and specifying 'where'
    after giving the user name also.
 -- -L, --allclusters now works with sacct
 -- Modified job table to use 32bit u/gids for those with ids greater 
    than 16 bits.
 -- Made minor changes for slurm to compile cleanly under gcc 4.4.1
 -- Fixed issue with task/affinity when an allocation would run multiple sruns 
    with the --exclusive flag in an allocation with more than 1 node.  
    Previously when the first node was filled up no tasks would ever run 
    on the other nodes.
 -- Fixed sview and sacct to display correct run time and suspend time when 
    job has been suspended.
 -- Applied patch from Mark Grondona that fixes the validation of the
    PluginDir to support the colon separated list of directories as documented.
 -- BLUEGENE - squeue -o %R now prints more readable info for small blocks
 -- sacct - fixed garbage being printed out on uninitialized variable.
 -- Fix for mysql plugin when used without slurmdbd to register the 
    slurmctld properly.
 -- Fix for mysql plugin putting correct hostnames in for running steps.

* Changes in SLURM 2.0.7
========================
 -- Fix bug in select/cons_res when nodes are configured in more than one 
    partition and those partitions have different priorities and sched/gang
    is not configured. CPUs were previously over-allocated.
 -- Fix core of smap when specifying -i option with invalid argument.
 -- Fix issue when using srun --test-only to not put an entry of test 
    job into accounting.
 -- For OpenMPI use of SLURM reserved ports. If any of the tasks fails to 
    acquire a reserved port and has an exit code of 108 then srun will 
    kill all remaining tasks and respawn the tasks. Previous code waited 
    for tasks to exit.
 -- MySQL plugin - When doing archiving we now get a correct end time.  
    Previously it would grab an extra day to archive.
 -- BLUEGENE - Handle initial state correctly, previously was setting initial 
    state to IDLE if UNKNOWN which would make it not set a registration 
    message to accounting, which could lead to nodes not being listed as up 
    when they really were.
 -- Fixed buffer size issue with scontrol show hostlist.
 -- Fixed issue with copy in smap -Dc previously command wouldn't work.
 -- BLUEGENE - Update documentation about small blocks in the bluegene.conf 
    file.
 -- In sched/wiki plugin (for Maui) fix possible message truncation on very 
    large cluster.
 -- BLUEGENE - Fix for handling undocumented Deallocating to Configuring to 
    Free block transition state.
 -- BLUEGENE - Fix for overlap mode loading blocks when midplane is in an
    error state.
 -- Add range check for SuspendTime configuration parameter.
 -- Moved unzipped python-hostname tarball out and the tarball in.
 -- BLUEGENE - Patched memory leak when running state test.
 -- BLUEGENE - fixed slow down generated by slow call rm_get_BG 
    and polling thread.

* Changes in SLURM 2.0.6
========================
 -- Fixed seg fault when "scontrol listpids" is invoked for a specific job step
    on a node on which a stepd is not running.
 -- Fix bug in sched/backfill which could result in invalid memory reference 
    when trying to schedule jobs submitted with --exclude option.

* Changes in SLURM 2.0.5
========================
 -- BLUEGENE - Added support for emulating systems with a X-dimension of 4.
 -- BLUEGENE - When a nodecard goes down on a non-Dynamic system SLURM will 
    now only drain blocks under 1 midplane, if no such block exists then SLURM 
    will drain the entire midplane and not mark any block in error state.  
    Previously SLURM would drain every overlapping block of the nodecard 
    making it possible for a large block to make other blocks not work since 
    they overlap some other part of the block that really isn't bad.
 -- BLUEGENE - Handle L3 errors on boot better.
 -- Don't revoke a pending batch launch request from the slurmctld if the
    job is immediately suspended (a normal event with gang scheduling).
 -- BLUEGENE - Fixed issue with restart of slurmctld would allow error block 
    nodes to be considered for building new blocks when testing if a job would 
    run.  This is a visual bug only, jobs would never run on new block, but 
    the block would appear in slurm tools.
 -- Better responsiveness when starting new allocations when running with the 
    slurmdbd.
 -- Fixed race condition when reconfiguring the slurmctld and using the 
    consumable resources plugin which would cause the controller to core.
 -- Fixed race condition that sometimes caused jobs to stay in completing
    state longer than necessary after being terminated.
 -- Fixed issue where if a parent account has a qos added and then a child
    account has the qos removed the users still get the qos.
 -- BLUEGENE - New blocks in dynamic mode will only be made in the system
    when the block is actually needed for a job, not when testing.
 -- BLUEGENE - Don't remove larger block used for small block until job starts.
 -- Add new squeue output format and sort option of "%L" to print a job's time 
    left (time limit minus time used).
 -- BLUEGENE - Fixed draining state count for sinfo/sview.
 -- Fix for sview to not core when viewing nodes allocated to a partition 
    and the all jobs finish.
 -- Fix cons_res to not core dump when finishing a job running on a 
    defunct partition.
 -- Don't require a node to have --ntasks-per-node CPUs for use when the 
    --overcommit option is also used.
 -- Increase the maximum number of tasks which can be launched by a job step
    per node from 64 to 128. 
 -- sview - make right click on popup window title show sorted list.
 -- scontrol now displays correct units for job min memory and min tmp disk.
 -- better support for salloc/sbatch arbitrary layout for setting correct 
    SLURM_TASKS_PER_NODE
 -- Env var SLURM_CPUS_ON_NODE is now set correctly depending on the 
    FastSchedule configuration parameter.
 -- Correction to topology/3d_torus plugin calculation when coordinate value 
    exceeds "9" (i.e. a hex value).
 -- In sched/wiki2 - Strip single and double quotes out of a node's reason 
    string to avoid confusing Moab's parser.
 -- Modified scancel to cancel any pending jobs before cancelling any other
 -- Updated sview config info
 -- Fix a couple of bugs with respect to scheduling with overlapping 
    reservations (one with a flag of "Maintenance").
 -- Fix bug when updating a pending job's nice value after explicitly setting
    it's priority.
 -- We no longer add blank QOS'
 -- Fix task affinity for systems running fastschedule!=0 and they have less 
    resources configured than in existence.
 -- Slurm.pm loads without warning now on AIX systems
 -- modified pmi code to do strncpy's on the correct len
 -- Fix for filling in a qos structure to return SLURM_SUCCESS on success.
 -- BLUEGENE - Added SLURM_BG_NUM_NODES with cnode count of allocation, 
    SLURM_JOB_NUM_NODES represents midplane counts until 2.1.
 -- BLUEGENE - Added fix for if a block is in error state and the midplane 
    containing the block is also set to drain/down.  This previously 
    prevented dynamic creation of new blocks when this state was present.
 -- Fixed bug where a users association limits were not enforced, only 
    parent limits were being enforced.
 -- For OpenMPI use of SLURM reserved ports, reserve a count of ports equal to 
    the maximum task count on any node plus one (the plus one is a correction).
 -- Do not reset SLURM_TASKS_PER_NODE when srun --preserve-env option is used
    (needed by OpenMPI).
 -- Fix possible assert failure in task/affinity if a node is configured with
    more resources than physically exist.
 -- Sview can now resize columns.
 -- Avoid clearing a drained node's reason field when state is changed from
    down (i.e. returned to service). Note the drain state flag stays set.

* Changes in SLURM 2.0.4
========================
 -- Permit node suspend/resume logic to be enabled through "scontrol reconfig"
    given appropriate changes to slurm configuration file.
 -- Check for return codes on functions with warn_unused_result set.
 -- Fix memory leak in getting step information (as used by squeue -s).
 -- Better logging for when job's request bad output file locations.
 -- Fix issue where if user specified non-existant file to write to slurmstepd
    will regain privileges before sending batch script ended to the controller.
 -- Fix bug when using the priority_multifactor plugin with no associations 
    yet.
 -- BLUEGENE - we no longer check for the images to sync state.  This was 
    needed long ago when rebooting blocks wasn't a possibility and should 
    had been removed when that functionality was available.
 -- Added message about no connection with the database for sacctmgr.
 -- On BlueGene, let srun or salloc exit on SIGINT if slurmctld dies while
    booting its block.
 -- In select/cons_res fix bug that could result in invalid memory pointer
    if node configurations in slurm.conf contains 8 or more distinct 
    socket/core/thread counts.
 -- Modify select/cons_res to recognize updated memory size upon node startup
    if FastSchedule=0.
 -- Fixed bug if not enforcing associations, but running with them and the 
    priority/multifactor, the slurmctld will not core dump on processing usage.
 -- QOS will not be reset to the default when added back a previously deleted
    association.
 -- Do not set a job's virtual memory limit based upon the job's specified
    memory limit (which should be a real memory limit, not virtual).
 -- BLUEGENE - fix for sinfo/sview for displaying proper node count for nodes 
    in draining state.
 -- Fix for sview when viewing a certain part of a group (like 1 job) so it 
    doesn't core when the part is gone.
 -- BLUEGENE - Changed order of SYNC's to be on the front of the list to
    avoid having a job terminated with a TERM before the SYNC of the 
    job happens.
 -- Validate configured PluginDir value is a valid directory before trying to
    use it.
 -- Fix to resolve agent_queue_request symbol from some checkpoint plugins.
 -- Fix possible execve error for sbatch script read from stdin.
 -- Modify handling of user ID/name and group ID/name in the slurm.conf file
    to properly handle user names that contain all digits. Return error code 
    from uid_from_string() and gid_from_string() functions rather than a uid of
    -1, which might be a valid uid or gid on some systems.
 -- Fix in re-calcuation of job priorities due to DOWN or DRAINED nodes.

* Changes in SLURM 2.0.3
========================
 -- Add reservation creation/update flag of Ignore_Jobs to enable the creation
    of a reservation that overlaps jobs expected to still be running when
    the reservation starts. This would be especially useful to reserve all 
    nodes for system maintenence without adjusting time limits of running
    jobs before creating the reservation. Without this flag, nodes allocated
    jobs expected to running when the reservation begins can not be placed 
    into a reservation.
 -- In task/affinity plugin, add layer of abstraction to logic translating
    block masks to physical machine masks. Patch from Matthieu Hautreux, CEA.
 -- Fix for setting the node_bitmap in a job to NULL if the job does not 
    start correctly when expected to start.
 -- Fixed bug in srun --pty logic. Output from the task was split up 
    arbitrarily into stdout and stderr streams, and sometimes was printed 
    out of order.
 -- If job requests minimum and maximum node count range with select/cons_res,
    try to satisfy the higher value (formerly only allocated the minimum).
 -- Fix for checking for a non-existant job when querying steps.
 -- For job steps with the --exclusive option, base initial wait time in 
    partly upon the process ID for better performance with many job steps 
    started at the same time. Maintain exponential back-off as needed.
 -- Fix for correct step ordering in sview.
 -- Support optional argument to srun and salloc --immediate option. Specify
    timeout value in seconds for job or step to be allocated resources.

* Changes in SLURM 2.0.2
========================
 -- Fix, don't remove job details when a job is cancelled while pending.
 -- Do correct type for mktime so garbage isn't returned on 64bit systems 
    for accounting archival.
 -- Better checking in sacctmgr to avoid infinite loops.
 -- Fix minor memory leak in fake_slurm_step_layout_create()
 -- Fix node weight (scheduling priority) calculation for powered down
    nodes. Patch from Hongjia Cao, NUDT.
 -- Fix node suspend/resume rate calculations. Patch from Hongjia Cao, NUDT.
 -- Change calculations using ResumeRate and SuspendRate to provide higher
    resolution.
 -- Log the IP address for incoming messages having an invalid protocol 
    version number.
 -- Fix for sacct to show jobs that start the same second as the sacct
    command is issued.
 -- BLUEGENE - Fix for -n option to work on correct cpu counts for each 
    midplane instead of treating -n as a c-node count.
 -- salloc now sets SLURM_NTASKS_PER_NODE if --ntasks-per-node option is set.
 -- Fix select/linear to properly set a job's count of allocated processors
    (all processors on the allocated nodes).
 -- Fix select/cons_res to allocate proper CPU count when --ntasks-per-node
    option is used without a task count in the job request.
 -- Insure that no node is allocated to a job for which the CPU count is less
    than --ntasks-per-node * --cpus-per-task.
 -- Correct AllocProcs reported by "scontrol show node" when ThreadsPerCore
    is greater than 1 and select/cons_res is used.
 -- Fix scontrol show config for accounting information when values are 
    not set in the slurm.conf.
 -- Added a set of SBATCH_CPU_BIND* and SBATCH_MEM_BIND* env variables to keep
    jobsteps launched from within a batch script from inheriting the CPU and
    memory affinity that was applied to the batch script. Patch from Matthieu
    Hautreux, CEA.
 -- Ignore the extra processors on a node above configured size if either 
    sched/gang or select/cons_res is configured.
 -- Fix bug in tracking memory allocated on a node for select/cons_res plugin.
 -- Fixed a race condition when writing labelled output with a file per task
    or per node, which potentially closed a file before all data was written.
 -- BLUEGENE - Fix, for if a job comes in spanning both less than and 
    over 1 midplane in size we check the connection type appropriately.
 -- Make sched/backfill properly schedule jobs with constraints having node 
    counts. NOTE: Backfill of jobs with constraings having exclusive OR 
    operators are not fully supported.  
 -- If srun is cancelled by SIGINT, set the job state to cancelled, not 
    failed.
 -- BLUEGENE - Fix, for if you are setting an subbp into an error mode 
    where the subbp stated isn't the first ionode in a nodecard.
 -- Fix for backfill to not core when checking shared nodes.
 -- Fix for scontrol to not core when hitting just return in interactive mode.
 -- Improve sched/backfill logic with respect to shared nodes (multiple jobs
    per node).
 -- In sched/wiki (Maui interface) add job info fields QOS, RCLASS, DMEM and
    TASKSPERNODE. Patch from Bjorn-Helge Mevik, University of Oslo.

* Changes in SLURM 2.0.1
========================
 -- Fix, truncate time of start and end for job steps in sacct.
 -- Initialize all messages to slurmdbd. Previously uninitialized string could
    cause slurmctld to fail with invalid memory reference.
 -- BLUEGENE - Fix, for when trying to finish a torus on a block already 
    visited.  Even though this may be possible electrically this isn't valid
    in the under lying infrastructure.
 -- Fix, in mysql plugins change mediumints to int to support full 32bit 
    numbers.
 -- Add sinfo node state filtering support for NO_RESPOND, POWER_SAVE, FAIL, 
    MAINT, DRAINED and DRAINING states. The state filter of DRAIN still maps
    to any node in either DRAINED or DRAINING state.
 -- Fix reservation logic when job requests specific nodes that are already
    in some reservation the job can not use.
 -- Fix recomputation of a job's end time when allocated nodes which are
    being powered up. The end time would be set in the past if the job's
    time limit was INFINITE, resulting in it being prematurely terminated.
 -- Permit regular user to change the time limit of his pending jobs up to
    the partition's limit.
 -- Fix "-Q" (quiet) option for salloc and sbatch which was previously 
    ignored.
 -- BLUEGENE - fix for finding odd shaped blocks in dynamic mode.
 -- Fix logic supporting SuspendRate and ResumeRate configuration parameters.
    Previous logic was changing state of one too many nodes per minute.
 -- Save new reservation state file on shutdown (even if no changes).
 -- Fix, when partitions are deleted the sched and select plugins are notified.
 -- Fix for slurmdbd to create wckeyid's when they don't exist
 -- Fix linking problem that prevented checkpoint/aix from working.

* Changes in SLURM 2.0.0
========================
 -- Fix for bluegene systems to be able to create 32 node blocks with only 
    16 psets defined in dynamic layout mode.
 -- Improve srun_cr handling of child srun forking. Patch from Hongjia Cao, 
    NUDT.
 -- Configuration parameter ResumeDelay replaced by SuspendTimeout and 
    ResumeTimeout.