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 1.3.0-pre5
=============================
 -- Add select_g_reconfigure() function to node changes in slurmctld configuration
    that can impact node scheduling.
 -- scontrol to set/get partition's MaxTime and job's Timelimit in minutes plus
    new formats: min:sec, hr:min:sec, days-hr:min:sec, days-hr, etc.
 -- scontrol "notify" command added to send message to stdout of srun for 
    specified job id.
 -- For BlueGene, make alpha part of node location specification be case insensitive.
 -- Report scheduler-plugin specific configuration information with the 
    "scontrol show configuration" command on the SCHEDULER_CONF line. This
    information is not found in the "slurm.conf" file, but a scheduler plugin 
    specific configuration (e.g. "wiki.conf").
 -- sview partition information reported now includes partition priority.

* Changes in SLURM 1.3.0-pre4
=============================
 -- Job step launch in srun is now done from the slurm api's all further
    modifications to job launch should be done there.
 -- Add new partition configuration parameter Priority. Add job count to 
    Shared parameter.
 -- Add new configuration parameters DefMemPerTask, MaxMemPerTask, and 
    SchedulerTimeSlice.
 -- In sched/wiki2, return REJMESSAGE with details on why a job was 
    requeued (e.g. what node failed).

* Changes in SLURM 1.3.0-pre3
=============================
 -- Remove slaunch command
 -- Added srun option "--checkpoint=time" for job step to automatically be 
    checkpointed on a period basis.
 -- Change behavior of "scancel -s KILL <jobid>" to send SIGKILL to all job
    steps rather than cancelling the job. This now matches the behavior of
    all other signals. "scancel <jobid>" still cancels the job and all steps.
 -- Add support for new job step options --exclusive and --immediate. Permit
    job steps to be queued when resources are not available within an existing 
    job allocation to dedicate the resources to the job step. Useful for
    executing simultaneous job steps. Provides resource management both at 
    the level of jobs and job steps.
 -- Add support for feature count in job constraints, for example
    srun --nodes=16 --constraint=graphics*4 ...
    Based upon work by Kumar Krishna (HP, India).
 -- Add multi-core options to salloc and sbatch commands (sbatch.patch and
    cleanup.patch from Chris Holmes, HP).
 -- In select/cons_res properly release resources allocated to job being 
    suspended (rmbreak.patch, from Chris Holmes, HP).
 -- Removed database and jobacct plugin replaced with jobacct_storage 
    and jobacct_gather for easier hooks for further expansion of the
    jobacct plugin.

* Changes in SLURM 1.3.0-pre2
=============================
 -- Added new srun option --pty to start job with pseudo terminal attached 
    to task 0 (all other tasks have I/O discarded)
 -- Disable user specifying jobid when sched/wiki2 configured (needed for 
    Moab releases until early 2007).
 -- Report command, args and working directory for batch jobs with 
    "scontrol show job".

* Changes in SLURM 1.3.0-pre1
=============================
 -- !!! SRUN CHANGES !!!
    The srun options -A/--allocate, -b/--batch, and -a/--attach have been
    removed!  That functionality is now available in the separate commands
    salloc, sbatch, and sattach, respectively.
 -- Add new node state FAILING plus trigger for when node enters that state.
 -- Add new configuration paramter "PrivateData". This can be used to 
    prevent a user from seeing jobs or job steps belonging to other users.
 -- Added configuration parameters for node power save mode: ResumeProgram
    ResumeRate, SuspendExcNodes, SuspendExcParts, SuspendProgram and 
    SuspendRate.
 -- Slurmctld maintains the IP address (rather than hostname) for srun 
    communications. This fixes some possible network routing issues.
 -- Added global database plugin.  Job accounting and Job completion are the 
    first to use it.  Follow documentation to add more to the plugin.
 -- Removed no-longer-needed jobacct/common/common_slurmctld.c since that is
    replaced by the database plugin.
 -- Added new configuration parameter: CryptoType.
    Moved existing digital signature logic into new plugin: crypto/openssl.
    Added new support for crypto/munge (available with GPL license).

* Changes in SLURM 1.2.20
=========================
 -- In switch/federation, fix small memory leak effecting slurmd.
 -- Add PMI_FANOUT_OFF_HOST environment variable to control how message 
    forwarding is done for PMI (MPICH2). See "man srun" for details.
 -- From sbatch set SLURM_NTASKS_PER_NODE when --ntasks-per-node option is 
    specified.
 -- BLUEGENE: Documented the prefix should always be lower case and the 3
    digit suffix should be uppercase if any letters are used as digits. 
 -- In sched/wiki and sched/wiki2, add support for --cpus-per-task option.
    From Miguel Ros, BSC.
 -- In sched/wiki2, prevent invalid memory pointer (and likely seg fault) 
    for job associated with a partition that has since been deleted.
 -- In sched/wiki2 plus select/cons_res, prevent invalid memory pointer 
    (and likely seg fault) when a job is requeued.
 -- In sched/wiki, add support for job suspend, resume, and modify.
 -- In sched/wiki, add suppport for processor allocation (not just node allocation)
    with layout control.
 -- Prevent re-sending job termination RPC to a node that has already completed 
    the job. Only send it to specific nodes which have not reported completion.

* Changes in SLURM 1.2.19
=========================
*** NOTE IMPORTANT CHANGE IN RPM BUILD BELOW ****
 -- slurm.spec file (used to build RPMs) was updated in order to support Mock, a
    chroot build environment. See https://hosted.fedoraproject.org/projects/mock/
    for more information. The following RPMs are no longer build by default:
    aix-federation, auth_none, authd, bluegene, sgijob, and switch-elan. Change 
    the RPMs built using the following options in ~/rpmmacros: "%_with_authd 1", 
    "%_without_munge 1", etc. See the slurm.spec file for more details.
 -- Print warning if non-privileged user requests negative "--nice" value on
    job submission (srun, salloc, and sbatch commands).
 -- In sched/wiki and sched/wiki2, add support for srun's --ntasks-per-node 
    option.
 -- In select/bluegene with Groups defined for Images, fix possible memory 
    corruption. Other configurations are not affected. 
 -- BLUEGENE - Fix bug that prevented user specification of linux-image, 
    mloader-image, and ramdisk-image on job submission.
 -- BLUEGENE - filter Groups specified for image not just by submitting 
    user's current group, but all groups the user has access to.
 -- BLUEGENE - Add salloc options to specify images to be loaded (--blrts-image, 
    --linux-image, --mloader-image, and --ramdisk-image).
 -- BLUEGENE - In bluegene.conf, permit Groups to be comma separated in addition 
    to colon separators previously supported.
 -- sbatch will accept batch script containing "#SLURM" options and advise
    changed to "#SBATCH".
 -- If srun --output or --error specification contains a task number rather 
    than a file name, send stdout/err from specified task to srun's stdout/err
    rather than to a file by the same name as the task's number.
 -- For srun --multi-prog option, verify configuration file before attempting 
    to launch tasks, report clear explanation of any configuration file errors.
 -- For sched/wiki2, add optional timeout option to srun's --get-user-env
    parameter, change default timeout for "su - <user> env" from 3 to 8 seconds.
    On timeout, attempt to load env from file at StateSaveLocation/env_cache/<user>.
    The format of this file is the same as output of "env" command. If there
    is no env cache file, then abort the request.
 -- squeue modified for completing job to remove nodes that have already 
    completed the job before applying node filter logic.
 -- squeue formatted output option added for job comment, "%q" (the obvious 
    choices for letters are already in use).
 -- Added configure option --enable-load-env-no-login for use with Moab. If
    set then the user job runs with the environment built without a login
    ("su <user> env" rather than "su - <user> env").
 -- Fix output of "srun -o %C" (allocated CPU count) for running jobs. This was
    broken in 1.2.18 for handling requeue of Moab jobs.
 -- Added logic to mpiexec wrapper to read in the MPIEXEC_TIMEOUT var
 -- Updated qstat wrapper to display information for partitions (-Q) option
 -- NOTE: SLURM should now work directly with Globus using the PBS GRAM.

* Changes in SLURM 1.2.18
=========================
 -- BLUEGENE - bug fix for smap stating passthroughs are used when they aren't
 -- Fixed bug in sview to be able to edit partitions correctly
 -- Fixed bug so in slurm.conf files where SlurmdPort isn't defined things
    work correctly.
 -- In sched/wiki2 and sched/wiki add support for batch job being requeued
    in Slurm either when nodes fail or upon request.
 -- In sched/wiki2 and sched/wiki with FastSchedule=2 configured and nodes 
    configured with more CPUs than actually exist, return a value of TASKS 
    equal to the number of configured CPUs that are allocated to a job rather 
    than the number of physical CPUs allocated.
 -- For sched/wiki2, timeout "srun --get-user-env ..." command after 3 seconds 
    if unable to perform pseudo-login and get user environment variables.
 -- Add contribs/time_login.c program to test how long pseudo-login takes
    for specific users or all users. This can identify users for which Moab 
    job submissions are unable to set the proper environment variables.
 -- Fix problem in parallel make of Slurm.
 -- Fixed bug in consumable resources when CR_Core_Memory is enabled
 -- Add delay in slurmctld for "scontrol shutdown" RPC to get propagated 
    to slurmd daemons.

* Changes in SLURM 1.2.17
=========================
 -- In select/cons_res properly release resources allocated to job being 
    suspended (rmbreak.patch, from Chris Holmes, HP).
 -- Fix AIX linking problem for PMI (mpich2) support.
 -- Improve PMI logic for greater scalability (up to 16k tasks run).
 -- Add srun support for SLURM_THREADS and PMI_FANOUT environment variables.
 -- Fix support in squeue for output format with left justification of 
    reason (%r) and reason/node_list (%R) output.
 -- Automatically requeue a batch job when a node allocated to it fails
    or the prolog fails (unless --no-requeue or --no-kill option used).
 -- In sched/wiki, enable use of wiki.conf parameter ExcludePartitions to
    directly schedule selected partitions without Maui control.
 -- In sched/backfill, if a job requires specific nodes, schedule other jobs
    ahead of it rather than completely stopping backfill scheduling for that
    partition.
 -- BLUEGENE - corrected logic making block allocation work in a circular 
    fashion instead of linear.
 
* Changes in SLURM 1.2.16
=========================
 -- Add --overcommit option to the salloc command.
 -- Run task epilog from job's working directory rather than directory
    where slurmd daemon started from.
 -- Log errors running task prolog or task epilog to srun's output.
 -- In sched/wiki2, fix bug processing condensed hostlist expressions.
 -- Release contribs/mpich1.slurm.patch without GPL license. 
 -- Fix bug in mvapich plugin for read/write calls that return EAGAIN.
 -- Don't start MVAPICH timeout logic until we know that srun is starting 
    an MVAPICH program.
 -- Fix to srun only allocating number of nodes needed for requested task
    count when combining allocation and step creation in srun.
 -- Execute task-prolog within proctrack container to insure that all 
    child processes get terminated.
 -- Fixed job accounting to work with sgi_job proctrack plugin.

* Changes in SLURM 1.2.15
=========================
 -- In sched/wiki2, fix bug processing hostlist expressions where hosts
    lack a numeric suffix.
 -- Fix bug in srun. When user did not specify time limit, it defaulted to 
    INFINITE rather than partition's limit.
 -- In select/cons_res with SelectTypeParameters=CR_Socket_Memory, fix bug in 
    memory allocation tracking, mem.patch from Chris Holmes, HP.
 -- Add --overcommit option to the sbatch command.

* Changes in SLURM 1.2.14
=========================
 -- Fix a couple of bugs in MPICH/MX support (from Asier Roa, BSC).
 -- Fix perl api for AIX
 -- Add wiki.conf parameter ExcludePartitions for selected partitions to 
    be directly schedule by Slurm without Moab control
 -- Optimize load leveling for shared nodes (alloc.patch, contributed 
    by Chris Holmes, HP).
 -- Added PMI_TIME environment variable for user to control how PMI 
    communications are spread out in time. See "man srun" for details.
 -- Added PMI timing information to srun debug mode to aid in tuning.
    Use "srun -vv ..." to see the information.
 -- Added checkpoint/ompi (OpenMPI) plugin (still under development).
 -- Fix bug in load leveling logic added to v1.2.13 which can cause an 
    infinite loop and hang slurmctld when sharing nodes between jobs.
 -- Added support for sbatch to read in #PBS options from a script

* Changes in SLURM 1.2.13
=========================
 -- Add slurm.conf parameter JobFileAppend.
 -- Fix for segv in "scontrol listpids" on nodes not in SLURM config.
 -- Add support for SCANCEL_CTLD env var.
 -- In mpi/mvapich plugin, add startup timeout logic. Time based upon 
    SLURM_MVAPICH_TIMEOUT (value in seconds).
 -- Fixed pick_step_node logic to only pick the number of nodes requested
    from the user when excluding nodes, to avoid an error message.
 -- Disable salloc, sbatch and srun -I/--immediate options with 
    Moab scheduler.
 -- Added "contribs" directory with a Perl API and Torque wrappers for Torque 
    to SLURM migration.  This directory should be used to put anything that 
    is outside of SLURM proper such as a different API. Perl APIs contributed 
    by Hongjia Cao (NUDT).
 -- In sched/wiki2: add support for tasklist with node name expressions 
    and task counts (e.g. TASKLIST=tux[1-4]*2:tux[12-14]*4").
 -- In select/cons_res with sched/wiki2: fix bug in task layout logic.
 -- Removed all curses info from the bluegene plugin putting it into smap
    where it belongs.  
 -- Add support for job time limit specification formats: min, min:sec, 
    hour:min:sec, and days-hour:min:sec (formerly only supported minutes).
    Applies to salloc, sbatch, and srun commands.
 -- Improve scheduling support for exclusive constraint list, nodes can 
    now be in more than one constraint specific exclusively for a job
    (e.g. "srun -C [rack1|rack2|rack3|rowB] srun")
 -- Create separate MPICH/MX plugin (split out from MPICH/GM plugin)
 -- Increase default MessageTimeout (in slurm.conf) from 5 to 10 secs.
 -- Fix bug in batch job requeue if node zero of allocation fails to respond 
    to task launch request.
 -- Improve load leveling logic to more evenly distribute the workload 
    (best_load.patch, contributed by Chris Holmes, HP).
 
* Changes in SLURM 1.2.12
=========================
 -- Increase maximum message size from 1MB to 16MB (from Ernest Artiaga, BSC). 
 -- In PMI_Abort(), log the event and abort the entire job step.
 -- Add support for additional PMI functions: PMI_Get_clique_ranks and 
    PMI_Get_clique_size (from Chuck Clouston, Bull).
 -- Report an error when a hostlist comes in appearing to be a box but not 
    formatted in XYZxXYZ format.
 -- Add support for partition configuration "Shared=exclusive". This is 
    equivalent to "srun --exclusive" when select/cons_res is configured.
 -- In sched/wiki2, report the reason for a node being unavailable for the 
    GETNODES command using the CAT="<reason>" field.
 -- In sched/wiki2 with select/linear, duplicate hostnames in HOSTLIST, one
    per allocated processor.
 -- Fix bug in scancel with specific signal and job lacks active steps.
 -- In sched/wiki2, add support for NOTIFYJOB ARG=<jobid> MSG=<message>.
    This sends a message to an active srun command.
 -- salloc will now set SLURM_NPROCS to improve srun's behavior under salloc.
 -- In sched/wiki2 and select/cons_res: insure that Slurm's CPU allocation
    is identical to Moab's (from Ernest Artiaga and Asier Roa, BSC).
 -- Added "scontrol show slurmd" command to status local slurmd daemon.
 -- Set node DOWN if prolog fails on node zero of batch job launch.
 -- Properly handle "srun --cpus-per-task" within a job allocation when 
    SLURM_TASKS_PER_NODE environment varable is not set.
 -- Fixed return of slurm_send_rc_msg if msg->conn_fd is < 0 set errno ENOTCONN
    and return SLURM_ERROR instead of return ENOTCONN
 -- Added read before we send anything down a socket to make sure the socket
    is still there.
 -- Add slurm.conf variables UnkillableStepProgram and UnkillableStepTimeout.
 -- Enable nice file propagation from sbatch command.
 
* Changes in SLURM 1.2.11
=========================
 -- Updated "etc/mpich1.slurm.patch" for direct srun launch of MPICH1_P4
    tasks. See the "README" portion of the patch for details.
 -- Added new scontrol command "show hostlist <hostnames>" to translate a list 
    of hostnames into a hostlist expression (e.g. "tux1,tux2" -> "tux[1-2]")
    and "show hostnames <list>", returns a list of of nodes (one node per line)
    from SLURM hostlist expression or from SLURM_NODELIST environment variable 
    if no hostlist specified.
 -- Add the sbatch option "--wrap".
 -- Add the sbatch option "--get-user-env".
 -- Added support for mpich-mx (use the mpichgm plugin).
 -- Make job's stdout and stderr file access rights be based upon user's umask
    at job submit time.
 -- Add support for additional PMI functions: PMI_Parse_option,
    PMI_Args_to_keyval, PMI_Free_keyvals and PMI_Get_options (from Puenlap Lee
    and Nancy Kritkausky, Bull).
 -- Make default value of SchedulerPort (configuration parameter) be 7321.
 -- Use SLURM_UMASK environment variable (if set) at job submit time as umask 
    for spawned job.
 -- Correct some format issues in the man pages (from Gennero Oliva, ICAR).
 -- Added support for parallel make across an existing SLURM allocation
    based upon GNU make-3.81. Patch is in "etc/make.slurm.patch".
 -- Added '-b' option to sbatch for easy MOAB trasition to sbatch instead of
    srun.  Option does nothing in sbatch.
 -- Changed wiki2's handling of a node state in Completing to return 'busy' 
    instead of 'running' which matches slurm version 1.1

* Changes in SLURM 1.2.10
=========================
 -- Fix race condititon in jobacct/linux with use of proctrack/pgid and a
    realloc issue inside proctrack/linux
 -- Added MPICH1_P4 plugin for direct launch of mpich1/p4 tasks using srun
    and a patched version of the mpi library. See "etc/mpich1.slurm.patch".
    NOTE: This is still under development and not ready for production use.

* Changes in SLURM 1.2.9
========================
 -- Add new sinfo field to sort by "%E" sorts by the time associated with a 
    node's state (from Prashanth Tamraparni, HP).
 -- In sched/wiki: fix logic for restarting backup slurmctld.
 -- Preload SLURM plugins early in the slurmstepd operation to avoid
    multiple dlopens after forking (and to avoid a glibc bug
    that leaves dlopen locks in a bad state after a fork).
 -- Added MPICH1_P4 patch to launch tasks using srun rather than rsh and
    automatically generate mpirun's machinefile based upon the job's 
    allocation.    See "etc/mpich1.slurm.patch".
 -- BLUEGENE - fix for overlap mode to mark all other base partitions as used
    when creating a new block from the file to insure we only use the base 
    partitions we are asking for.

* Changes in SLURM 1.2.8
========================
 -- Added mpi/mpich1_shmem plugin.
 -- Fix in proctrack/sgi_job plugin that could cause slurmstepd to seg_fault
    preventing timely clean-up of batch jobs in some cases.

* Changes in SLURM 1.2.7
========================
 -- BLUEGENE - code to make it so you can make a 36x36x36 system.  
    The wiring should be correct for a system with x-dim of 1,2,4,5,8,13
    in emulation mode.  It will work with any real system no matter the size.
 -- Major re-write of jobcomp/script plugin: fix memory leak and 
    general code clean-up.
 -- Add ability to change MaxNodes and ExcNodeList for pending job 
    using scontrol.
 -- Purge zombie processes spawned via event triggers.
 -- Add support for power saving mode (experimental code to reduce voltage
    and frequency on nodes that stay in the IDLE state, for more information 
    see http://www.llnl.gov/linux/slurm/power_save.html). None of this
    code is enabled by default.

* Changes in SLURM 1.2.6
========================
 -- Fix MPIRUN_PORT env variable in mvapich plugin
 -- Disable setting triggers by other than user SlurmUser unless SlurmUser
    is root for improved security.
 -- Add event trigger for IDLE nodes.

* Changes in SLURM 1.2.5
========================
 -- Fix nodelist truncation in "scontrol show jobs" output
 -- In mpi/mpichgm, fix potential problem formatting GMPI_PORT, from
    Ernest Artiaga, BSC.
 -- In sched/wiki2 - Report job's account, from Ernest Artiaga, BSC.
 -- Add sbatch option "--ntasks-per-node".

* Changes in SLURM 1.2.4
========================
 -- In select/cons_res - fix for function argument type mis-match in getting
    CPU count for a job, from Ernest Artiaga, BSC.
 -- In sched/wiki2 - Report job's tasks_per_node requirement.
 -- In forward logic fix to check if the forwarding node recieves a connection
    but doesn't ever get the message from the sender (network issue or
    something) also check to make sure if we get something back we make sure
    we account for everything we sent out before we call it good.
 -- Another fix to make sure steps with requested nodes have correct cpus
    accounted for and a fix to make sure the user can't allocate more 
    cpus than the have requested.

* Changes in SLURM 1.2.3
========================
 -- Cpuset logic added to  task/affinity, from Don Albert (Bull) and
    Moe Jette (LLNL).  The /dev/cpuset file system must be mounted and 
    set "TaskPluginParam=cpusets" in slurm.conf to enable.
 -- In sched/wiki2, fix possible overflow in job's nodelist, from 
    Ernest Artiaga, BSC.
 -- Defer creation of new job steps until a suspended job is resumed.
 -- In select/linear - fix for potential stack corruption bug.

* Changes in SLURM 1.2.2
========================
 -- Added new command "strigger" for event trigger management, a new 
    capability. See "man strigger" for details.
 -- srun --get-user-env now sends su's stderr to /dev/null
 -- Fix in node_scheduling logic with multiple node_sets, from 
    Ernest Artiaga, BSC.
 -- In select/cons_res, fix for function argument type mis-match in getting 
    CPU count for a job.

* Changes in SLURM 1.2.1
========================
 -- MPICHGM support bug fixes from Ernest Artiaga, BSC.
 -- Support longer hostlist strings, from Ernest Artiaga, BSC.

* Changes in SLURM 1.2.0
========================
 -- Srun to use env vars for SLURM_PROLOG, SLURM_EPILOG, SLURM_TASK_PROLOG, 
    and SLURM_TASK_EPILOG. patch.1.2.0-pre11.070201.envproepilog from 
    Dan Palermo, HP.
 -- Documenation update. patch.1.2.0-pre11.070201.mchtml from Dan Palermo, HP.
 -- Set SLURM_DIST_CYCLIC = 1 (needed for HP MPI, slurm.hp.env.patch).
 
* Changes in SLURM 1.2.0-pre15
==============================
 -- Fix for another spot where the backup controller calls switch/federation
    code before switch/federation is initialized.

* Changes in SLURM 1.2.0-pre14
==============================
 -- In sched/wiki2, clear required nodes list when a job is requeued.
    Note that the required node list is set to every node used when 
    a job is started via sched/wiki2.
 -- BLUEGENE - Added display of deallocating blocks to smap and other tools. 
 -- Make slurmctld's working directory be same as SlurmctldLogFile (if any),
    otherwise StateSaveDir (which is likely a shared directory, possibly 
    making core file identification more difficult).
 -- Fix bug in switch/federation that results in the backup controller
    aborting if it receives an epilog-complete message.

* Changes in SLURM 1.2.0-pre13
==============================
 -- Fix for --get-user-env.

* Changes in SLURM 1.2.0-pre12
==============================
 -- BLUEGENE - Added correct node info for sinfo and sview for viewing
    allocated nodes in a partition.
 -- BLUEGENE - Added state save on slurmctld shutdown of blocks in an error 
    state on real systems and total block config on emulation systems.
 -- Major update to Slurm's PMI internal logic for better scalability.
    Communications now supported directly between application tasks via 
    Slurm's PMI library. Srun sends single message to one task on each node
    and that tasks forwards key-pairs to other tasks on that nodes. The old 
    code sent key-pairs directly to each task. 
    NOTE: PMI applications must re-link with this new library.
 -- For multi-core support: Fix task distribution bug and add automated 
    tests, patch.1.2.0-pre11.070111.plane from Dan Palermo (HP).

* Changes in SLURM 1.2.0-pre11
==============================
 -- Add multi-core options to slurm_step_launch API.
 -- Add man pages for slurm_step_launch() and related functions.
 -- Jobacct plugin only looks at the proctrack list instead of the entire
    list of processes running on the node. Cutting down a lot of unnecessary
    file opens in linux and cutting down the time to query the procs by
    more than half.
 -- Multi-core bug fix, mask re-use with multiple job steps,
    patch.1.2.0-pre10.061214.affinity_stepid from Dan Palermo (HP).
 -- Modify jobacct/linux plugin to completely eliminate open /proc files.
 -- Added slurm_sched_plugin_reconfig() function to re-read config files.
 -- BLUEGENE - --reboot option to srun, salloc, and sbatch actually works.
 -- Modified step context and step launch APIs.

* Changes in SLURM 1.2.0-pre10
==============================
 -- Fix for sinfo node state counts by state (%A and %F output options).
 -- Add ability to change a node's features via "scontrol update". NOTE: 
    Update slurm.conf also to preserve changes over slurmctld restart or 
    reconfig.
    NOTE: Job and node state information can not be preserved from earlier 
          versions.
 -- Added new slurm.conf parameter TaskPluginParam.
 -- Fix for job requeue and credential revoke logic from Hongjia Cao (NUDT).
 -- Fix for incorrectly generated masks for task/affinity plugin,
    patch.1.2.0-pre9.061207.bitfmthex from Dan Palermo (HP).
 -- Make mask_cpu options of srun and slaunch commands not requeue prefix
    of "0x". patch.1.2.0-pre9.061208.srun_maskparse from Dan Palermo (HP).
 -- Add -c support to the -B automatic mask generation for multi-core 
    support, patch.1.2.0-pre9.061208.mcore_cpuspertask from Dan Palermo (HP).
 -- Fix bug in MASK_CPU calculation, 
    patch.1.2.0-pre9.061211.avail_cpuspertask from Dan Palermo (HP).
 -- BLUEGENE - Added --reboot option to srun, salloc, and sbatch commands.
 -- Add "scontrol listpids [JOBID[.STEPID]]" support.
 -- Multi-core support patches, fixed SEGV and clean up output for large 
    task counts, patch.1.2.0-pre9.061212.cpubind_verbose from Dan Palermo (HP).
 -- Make sure jobacct plugin files are closed before exec of user tasks to 
    prevent problems with job checkpoint/restart (based on work by 
    Hongjia Cao, NUDT).

* Changes in SLURM 1.2.0-pre9
=============================
 -- Fix for select/cons_res state preservation over slurmctld restart,
    patch.1.2.0-pre7.061130.cr_state from Dan Palermo.
 -- Validate product of socket*core*thread count on node registration rather 
    than individual values. Correct values will need to be specified in slurm.conf 
    with FastSchedule=1 for correct multi-core scheduling behavior.

* Changes in SLURM 1.2.0-pre8
=============================
 -- Modity job state "reason" field to report why a job failed (previously 
    previously reported only reason waiting to run). Requires cold-start of 
    slurmctld (-c option).
 -- For sched/wiki2 job state request, return REJMESSAGE= with reason for 
    a job's failure.
 -- New FastSchedule configuration parameter option "2" means to base 
    scheduling decisions upon the node's configuration as specified in 
    slurm.conf and ignore the node's actual hardware configuration. This 
    can be useful for testing. 
 -- Add sinfo output format option "%C" for CPUs (active/idle/other/total).
    Based upon work by Anne-Marie Wunderlin (BULL).
 -- Assorted multi-core bug fixes (patch1.2.0-pre7.061128.mcorefixes).
 -- Report SelectTypeParameters from "scontrol show config".
 -- Build sched/wiki plugin for Maui Scheduler (based upon new sched/wiki2 
    code for Moab Scheduler).
 -- BLUEGENE - changed way of keeping track of smaller partitions using 
    ionode range instead of quarter nodecard notation. 
    (i.e. bgl000[0-3] instead of bgl000.0.0)
 -- Patch from Hongjia Cao (EINPROGRESS error message change)
 -- Fix for correct requid for jobacct plugin
 -- Added subsec timing display for sacct

* Changes in SLURM 1.2.0-pre7
=============================
 -- BLUEGENE - added configurable images for bluegene block creation.
 -- Plug a bunch of memory leaks.
 -- Support processors, core, and physical IDs that are not in numeric 
    order (in slurmd to gathering node state information, based on patch
    by Don Albert, Bull).
 -- Fixed bug with aix not looking in the correct dir for the proctrack
    include files
 -- Removed global_srun.* from common merged it into srun proper
 -- Added bluegene section to troubleshooting guide (web page). 
 -- NOTE: Requires cold-start when moving from 1.2.0-pre6, save state 
    info for jobs changed.
 -- BLUEGENE - Changed logic for wiring bgl blocks to be more maintainable.
    (Haven't tested on large system yet, works on 2 base partition system)
 -- Do not read the select/cons_res state save file if slurmctld is 
    cold-started (with the "-c" option).

* Changes in SLURM 1.2.0-pre6
=============================
 -- Maintain actually job step run time with suspend/resume use.
 -- Allow slurm.conf options to appear multiple times.  SLURM will use the
    last instance of any particular option.
 -- Add version number to node state save file. Will not recover node 
    state information on restart from older version.
 -- Add logic to save/restore multi-core state information.
 -- Updated multi-core logic to use types uint16_t and uint32_t instead 
    of just type int.
 -- Race condition for forwarding logic fix from Hongjia Cao
 -- Add support for Portable Linux Processor Affinity (PLPA, see
    http://www.open-mpi.org/software/plpa).
 -- When a job epilog completes on all non-DOWN nodes, immediately purge
    it's job steps that lack switch windows. Needed for LSF operation. 
    Based upon slurm.hp.node_fail.patch.
 -- Modify srun to ignore entries on --nodelist for job step creation 
    if their count exceeds the task count. Based on slurm.hp.srun.patch.

* Changes in SLURM 1.2.0-pre5
=============================
 -- Patch from HP patch.1.2.0.pre4.061017.crcore_hints, supports cores as 
    consumable resource.

* Changes in SLURM 1.2.0-pre4
=============================
 -- Added node_inx to job_step_info_t to get the node indecies for mapping out
    steps in a job by nodes.
 -- sview grid added
 -- BLUEGENE node_inx added to blocks for reference.
 -- Automatic CPU_MASK generation for task launch, new srun option -B.
 -- Automatic logical to physical processor identification and mapping.
 -- Added new srun options to --cpu_bind: sockets, cores, and threads
 -- Updated select/cons_res to operate as socket granularity.
 -- New srun task distribution options to -m: plane
 -- Multi-core support in sinfo, squeue, and scontrol.
 -- Memory can be treated as a consumable resource.
 -- New srun options --ntasks-per-[node|socket|core].

* Changes in SLURM 1.2.0-pre3
=============================
 -- Remove configuration parameter ShedulerAuth (defunct).
 -- Add NextJobId to "scontrol show config" output.
 -- Add new slurm.conf parameter MailProg.
 -- New forwarding logic.  New recieve_msg functions depending on what you
    are expecting to get back.  No srun_node_id anymore passed around in
    a slurm_msg_t
 -- Remove sched/wiki plugin (use sched/wiki2 for now)
 -- Disable pthread_create() for PMI_send when TotalView is running for 
    better performance.
 -- Fixed certain tests in test suite to not run with bluegene or front-end 
    systems
 -- Removed addresses from slurm_step_layout_t
 -- Added new job field, "comment". Set by srun, salloc and sbatch. See 
    with "scontrol show job". Used in sched/wiki2.
 -- Report a job's exit status in "scontrol show job".
 -- In sched/wiki2: add support for JOBREQUEUE command.
 
* Changes in SLURM 1.2.0-pre2
=============================
 -- Added function slurm_init_slurm_msg to be used to init any slurm_msg_t
    you no longer need do any other type of initialization to the type.

* Changes in SLURM 1.2.0-pre2
=============================
 -- Fixed task dist to work with hostfile and warn about asking for more tasks 
    than you have nodes for in arbitray mode.
 -- Added "account" field to job and step accounting information and sacct output.
 -- Moved task layout to slurmctld instead of srun.  Job step create returns
    step_layout structure with hostnames and addresses that corrisponds 
    to those nodes. 
 -- Changed api slurm_lookup_allocation params, 
    resource_allocation_response_msg_t changed to job_alloc_info_response_msg_t
    this structure is being renamed so contents are the same.
 -- alter resource_allocation_response_msg_t see slurm.h.in
 -- remove old_job_alloc_msg_t and function slurm_confirm_alloc	
 -- Slurm configuration files now support an "Include" directive to
    include other files inline.
 -- BLUEGENE New --enable-bluegene-emulation configure parameter to allow 
    running system in bluegene emulation mode.  Only
    really useful for developers.
 -- New added new tool sview GUI for displaying slurm info.
 -- fixed bug in step layout to lay out tasks correctly

* Changes in SLURM 1.2.0-pre1
=============================
 -- Fix bug that could run a job's prolog more than once
 -- Permit batch jobs to be requeued, scontrol requeue <jobid>
 -- Send overcommit flag from srun in RPCs and have slurmd set SLURM_OVERCOMMIT
    flag at batch job launch time.
 -- Added new configuration parameter MessageTimeout (replaces #define in 
    the code)
 -- Added support for OSX build.

* Changes in SLURM 1.1.37
=========================
 - In sched/wiki2: Add NAME to job record.
 - Changed -w (--nodelist) option to only read in number of nodes specified
   by -N option unless nprocs was set and in Arbitrary layout mode.
 - Added some loops around pthread creates incase they fail and also fixed an
   issue in srun to fail job has failed instead of waiting around for threads
   that will never end.
 - Added fork handlers in the slurmstepd
 - In sched/wiki2: fix logic for restarting backup slurmctld.
 - In sched/wiki2: if job has no time limit specified, return the partition's 
   time limit (which is the default for the job) rather than 365 days.

* Changes in SLURM 1.1.36
=========================
 - Permit node state specification of DRAIN in slurm.conf.
 - In jobcomp/script - fix bug that prevented UID and JOBID environment 
   variables from being set.

* Changes in SLURM 1.1.35
=========================
 - In sched/wiki2: Add support for CMD=SIGNALJOB to accept option
   of VALUE=SIGXXX in addition to VALUE=# and VALUE=XXX options.
 - In sched/wiki2: Add support for CMD=MODIFYJOB to accept option of
   DEPEND=afterany:<jobid>, specify jobid=0 to clear. 
 - Correct logic for job allocation with task count (srun -n ...) AND
   FastSchedule=0 AND low CPUs count in Slurm's node configuration.
 - Add new and undocumented scancel option, --ctld, to route signal 
   requests through slurmctld rather than directly to slurmd daemons.
   Useful for testing purposes.
 - Fixed issue with hostfile support not working in a job step.
 - Set supplemental groups for SlurmUser in slurmctld daemon, from
   Anne Marie Wunderlin, Bull.
 - In jobcomp/script: Add ACCOUNT and PROCS (count) to environment 
   variables set. Fix bug that prevented UID and JOBID from being 
   overwritten.

* Changes in SLURM 1.1.34
=========================
 - Insure that slurm_signal_job_step() is defined in srun for mvapich
   and mpichgm error conditions.
 - Modify /etc/init.d/slurm restart command to wait for daemon to terminate
   before starting a new one
 - Permit job steps to be started on draining nodes that have already 
   been allocated to that job.
 - Prevent backup slurmctld from purging pending batch job scripts when a 
   SIGHUP is received.
 - BLUEGENE - check to make sure set_block_user works when the block
   is in a ready state.
 - Fix to slurmstepd to not use local variables in a pthread create.
 - In sched/wiki2 - add wiki.conf paramter HostFormat specifying 
   format of hostlists exchanged between Slurm and Moab (experimental).
 - mpi/mvapich: Support Adam Moody's fast MPI initialization protocol 
   (MVAPICH protocol version 8).

* Changes in SLURM 1.1.33
=========================
 - sched/wiki2 - Do not wait for job completion before permitting 
   additional jobs to be scheduled.
 - Add srun SLURM_EXCLUSIVE environment variable support, from 
   Gilles Civario (Bull).
 - sched/wiki2 - Report job's node sharing options.
 - sched/wiki2 - If SchedulerPort is in use, retry opening it indefinitely.
 - sched/wiki2 - Add support for changing the size of a pending job.
 - BLUEGENE - Fix to correctly look at downed/drained nodes with picking 
   a block to run a job and not confuse it with another running job.

* Changes in SLURM 1.1.32
=========================
 - If a job's stdout/err file names are unusable (bad path), use the 
   default names.
 - sched/wiki2 - Fix logic to be compatible with select/cons_res plugin
   for allocating individual processors within nodes.
 - Fix job end time calculation when changed from an initial value of 
   INFINITE.
 
* Changes in SLURM 1.1.31
=========================
 - Correctly identify a user's login shell when running "srun -b --uid"
   as root.  Use the --uid field for the /etc/passwd lookup instead of
   getuid().

* Changes in SLURM 1.1.30
=========================
 - Fix to make sure users don't include and exclude the same node in 
   their srun line.
 - mpi/mvapich: Forcibly terminate job 60s after first MPI_Abort() 
   to avoid waiting indefinitely for hung processes.
 - proctrack/sgi_job: Fix segv when destroying an active job container 
   with processes still running.
 - Abort a job's stdout/err to srun if not processed within 5 minutes
   (prevents node hanging in completing state if the srun is stopped).

* Changes in SLURM 1.1.29
=========================
 - Fix bug which could leave orphan process put into background from 
   batch script.

* Changes in SLURM 1.1.28
=========================
 - BLUEGENE - Fixed issue with nodes that return to service outside of an
   admin state is now updated in the bluegene plugin.
 - Fix for --get-user-env parsing of non-printing characters in users' logins.
 - Restore "squeue -n localhost" support.
 - Report lack of PATH env var as verbose message, not error in srun.
 
* Changes in SLURM 1.1.27
=========================
 - Fix possible race condition for two simultaneous "scontrol show config" 
   calls resulting in slurm_xfree() Error: from read_config.c:642 
 - BLUEGENE - Put back logic to make a block fail a boot 3 times before 
   cancelling a users job.
 - Fix problem using srun --exclude option for a job step.
 - Fix problem generating slurmd error "Unrecognized request: 0" with 
   some compilers.

* Changes in SLURM 1.1.26
=========================
 - In sched/wiki2, fixes for support of job features.
 - In sched/wiki2, add "FLAGS=INTERACTIVE;" to GETJOBS response for 
   non-batch (not srun --batch) jobs.

* Changes in SLURM 1.1.25
=========================
 - switch/elan: Fix for "Failed to initialise stats structure" from
   libelan when ELAN_STATKEY > MAX_INT.
 - Tune PMI support logic for better scalability and performance.
 - Fix for running a task on each node of an allocation if not specified.
 - In sched/wiki2, set TASKLIST for running jobs.
 - In sched/wiki2, set STARTDATE for pending jobs with deferred start.
 - Added srun --get-user-env option (for Moab scheduler).

* Changes in SLURM 1.1.24
=========================
 - In sched/wiki2, add support for direct "srun --dependency=" use.
 - mpi/mvapich: Add support for MVAPICH protocol version 6.
 - In sched/wiki2, change "JOBMODIFY" command to "MODIFYJOB".
 - In sched/wiki2, change "JOBREQUEUE" command to "REQUEUEJOB".
 - For sched/wiki2, permit normal user to specify arbitrary job id.
 - In sched/wiki2, set buffer pointer to NULL after free() to avoid 
   possible memory corruption.
 - In sched/wiki2, report a job's exit code on completion.
 - For AIX, fix mail for job event notification.
 - Add documentation for propagation options in man srun and slurm.conf.

* Changes in SLURM 1.1.23
=========================
 - Fix bug in non-blocking connect() code affecting AIX.

* Changes in SLURM 1.1.22
=========================
 - Add squeue option to print a job step's task count (-o %A).
 - Initialize forward_struct to avoid trying to free a bad pointer,
   patch from Anton Blanchard (SAMBA).
 - In sched/wiki2, fix fatal race condition on slurmctld startup.
 - Fix for displaying launching verbose messages for each node under the
   tree instead of just the head one.
 - Fix job suspend bug, job accounting plugin would SEGV when given a 
   bad job ID.

* Changes in SLURM 1.1.21
=========================
 - BLUEGENE - Wait on a fini to make sure all threads are finished before
   cleaning up.
 - BLUEGENE - replacements to not destroy lists but just empty it to avoid
   losing the pointer to the list in the block allocator.
 - BLUEGENE - added --enable-bluegene-emulation configure option to 1.1
 - In sched/wiki2, enclose a job's COMMENT value in double quotes.
 - In sched/wiki2, support newly defined SIGNALJOB command.
 - In sched/wiki2, maintain open event socket, don't open and close 
   for each event.
 - In sched/wiki2, fix for scalability problem starting large jobs.
 - Fix logic to execute a batch job step (under an existing resource
   allocation) as needed by LSF.
 - Patches from Hongjia Cao (pmi finialize issues and type declaration)
 - Delete pending job if it's associated partition is deleted.
 - fix for handling batch steps completing correctly and setting the 
   return code.
 - Altered ncurses check to make sure programs can link before saying we 
   have a working curses lib and header.
 - Fixed an init issue with forward_struct_init not being set correctly in
   a few locations in the slurmd.
 - Fix for user to use the NodeHostname (when specified in the slurm.conf file)
   to start jobs on.

* Changes in SLURM 1.1.20
=========================
 - Added new SPANK plugin hook slurm_spank_local_user_init() called
   from srun after node allocation.
 - Fixed bug with hostfile support not working on a direct srun

* Changes in SLURM 1.1.19
=========================
 - BLUEGENE - make sure the order of blocks read in from the bluegene.conf
   are created in that order (static mode).
 - Fix logic in connect(), slurmctld fail-over was broken in v1.1.18.
 - Fix logic to calculate the correct timeout for fan out.

* Changes in SLURM 1.1.18
=========================
 - In sched/wiki2, add support for EHost and EHostBackup configuration 
   parameters in wiki.conf file
 - In sched/wiki2, fix memory management bug for JOBWILLRUN command.
 - In sched/wiki2, consider job Busy while in Completing state for 
   KillWait+10 seconds (used to be 30 seconds).
 - BLUEGENE - Fixes to allow full block creation on the system and not to add
   passthrough nodes to the allocation when creating a block. 
 - BLUEGENE - Fix deadlock issue with starting and failing jobs at the same
   time
 - Make connect() non-blocking and poll() with timeout to avoid huge 
   waits under some conditions.
 - Set "ENVIRONMENT=BATCH" environment variable for "srun --batch" jobs only.
 - Add logic to save/restore select/cons_res state information.
 - BLUEGENE - make all sprintf's into snprintf's
 - Fix for "srun -A" segfault on a node failure.

* Changes in SLURM 1.1.17
=========================
 - BLUEGENE - fix to make dynamic partitioning not go create block where
    there are nodes that are down or draining.
 - Fix srun's default node count with an existing allocation when neither
   SLURM_NNODES nor -N are set.
 - Stop srun from setting SLURM_DISTRIBUTION under job steps when a
   specific was not explicitly requested by the user.

* Changes in SLURM 1.1.16
=========================
 - BLUEGENE - fix to make prolog run 5 minutes longer to make sure we have
   enough time to free the overlapping blocks when starting a new job on a 
   block.
 - BLUEGENE - edit to the libsched_if.so to read env and look at 
   MPIRUN_PARTITION to see if we are in slurm or running mpirun natively.
 - Plugins are now dlopened RTLD_LAZY instead of RTLD_NOW.

* Changes in SLURM 1.1.15
=========================
 - BLUEGENE - fix to be able to create static partitions
 - Fixed fanout timeout logic.
 - Fix for slurmctld timeout on outgoing message (Hongjia Cao, NUDT.edu.cn).

* Changes in SLURM 1.1.14
=========================
 - In sched/wiki2: report job/node id and state only if no changes since 
   time specified in request.
 - In sched/wiki2: include a job's exit code in job state information.
 - In sched/wiki2: add event notification logic on job submit and completion.
 - In sched/wiki2: add support for JOBWILLRUN command type.
 - In sched/wiki2: for job info, include required HOSTLIST if applicable.
 - In sched/wiki2: for job info, replace PARTITIONMASK with RCLASS (report
   partition name associated with a job, but no task count)
 - In sched/wiki2: for job and node info, report all data if TS==0, 
   volitile data if TS<=update_time, state only if TS>update_time
 - In sched/wiki2: add support for CMD=JOBSIGNAL ARG=jobid SIGNAL=name or #
 - In sched/wiki2: add support for CMD=JOBMODIFY ARG=jobid [BANK=name]
   [TIMELIMIT=minutes] [PARTITION=name]
 - In sched/wiki2: add support for CMD=INITIALIZE ARG=[USEHOSTEXP=T|F]
   [EPORT=#]; RESPONSE=EPORT=# USEHOSTEXP=T
 - In sched/wiki2: fix memory leak.
 - Fix sinfo node state filtering when asking for idle nodes that are also 
   draining. 
 - Add Fortran extension to slurm_get_rem_time() API.
 - Fix bug when changing the time limit of a running job that has previously 
   been suspended (formerly failed to account for suspend time in setting 
   termination time).
 - fix for step allocation to be able to specify only a few nodes in a 
   step and ask for more that specified.
 - patch from Hongjia Cao for forwarding logic
 - BLUEGENE - able to allocate specific nodes without locking up.
 - BLUEGENE - better tracking of blocks that are created dynamically, 
   less hitting the db2.

* Changes in SLURM 1.1.13
=========================
 - Fix hang in sched/wiki2 if Moab stops responding responding when 
   response is outgoing. 
 - BLUEGENE - fix to make sure the block is good to go when picking it
 - BLUEGENE - add libsched_if.so so mpirun doesn't try to create a block
   by itself.
 - Enable specification of srun --jobid=# option with --batch (for user root).
 - Verify that job actually starts when requested by sched/wiki2.
 - Add new wiki.conf parameters: EPort and JobAggregationTime for event 
   notification logic (see wiki.conf man page for details)

* Changes in SLURM 1.1.12
=========================
 - Sched/wiki2 to report a job's account as COMMENT response to GETJOBS
    request.
 - Add srun option "--comment" (maps to job account until slurm v1.2, 
   needed for Moab scheduler functionality).
 - fixed some timeout issues in the controller hopefully stopping all the 
   issues with excessive timeouts.
 - unit conversion (i.e. 1024 => 1k) only happens on bgl systems for node 
   count.
 - Sched/wiki2 to report a job's COMPETETIME and SUSPENDTIME in GETJOBS 
   response.
 - Added support for Mellanox's version of mvapich-0.9.7.

* Changes in SLURM 1.1.11
=========================
 - Update file headers adding permission to link with OpenSSL.
 - Enable sched/wiki2 message authentication.
 - Fix libpmi compilation issue.
 - Remove "gcc-c++ python" from slurm.spec BuildRequires.  It breaks
   the AIX build, so we'll have to find another way to deal with that.

* Changes in SLURM 1.1.10
=========================
 -- task distribution fix for steps that are smaller than job allocation.
 -- BLUEGENE - fix to only send a success when block was created when trying
    to allocate the block.
 -- fix so if slurm_send_recv_node_msg fails on the send the auth_cred returned
    by the resp is NULL.
 -- Fix switch/federation plugin so backup controller can assume control 
    repeatedly without leaking or corrupting memory.
 -- Add new error code (for Maui/Moab scheduler): ESLURM_JOB_HELD
 -- Tweak slurmctld's node ping logic to better handle failed nodes with 
    hierarchical communications fail-over logic.
 -- Add support for sched/wiki specific configuration file "wiki.conf".
 -- Added sched/wiki2 plugin (new experimental wiki plugin).
 
* Changes in SLURM 1.1.9
========================
 -- BLUEGENE - fix to handle a NO_VAL sent in as num procs in the job 
    description.
 -- Fix bug in slurmstepd code for parsing --multi-prog command script.
    Parser was failing for commands with no arguments.
 -- Fix bug to check unsigned ints correctly in bitstring.c
 -- Alter node count covert to kilo to only convert number divisible by 
    1024 or 512

* Changes in SLURM 1.1.8
========================
 -- Added bug fixes (fault-tolerance and memory leaks) from Hongjia Cao 
    <hjcao@nudt.edu.cn>
 -- Gixed some potential BLUEGENE issues with the bridge log file not having
    a mutex around the fclose and fopen.
 -- BLUEGENE - srun -n procs now regristers correctly
 -- Fixed problem with reattach double allocating step_layout->tids
 -- BLUEGENE - fix race condition where job is finished before it starts.

* Changes in SLURM 1.1.7
========================
 -- BLUEGENE - fixed issue with doing an allocation for nodes since asking 
    for 32,128, or 512 all mean 1 to the controller.