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 1.2.0-pre2
=============================

* 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 1.1.2
========================
 -- Fix bug in jobcomp/filetxt plugin to report proper NodeCnt when a job 
    fails due to a node failure.
 -- Fix Bluegene configure to work with the new 64bit libs.
 -- Fix bug in controller that causes it to segfault when hit with a malformed
    message.
 -- For "srun --attach=X" to other users job, report an error and exit (it 
    previously just hung).
 -- BLUEGENE - fix for doing correct small block logic on user error. 
 -- BLUEGENE - Added support in slurmd to create a fake libdb2.so if it
    doesn't exist so smap won't seg fault
 -- BLUEGENE - "scontrol show job" reports "MaxProcs=None" and "Start=None"
    if values are not specified at job submit time
 -- Add retry logic for PMI communications, may be needed for highly parallel
    jobs.

* Changes in SLURM 1.1.1
========================
 -- Fix bug in packing job suspend/resume RPC.
 -- If a user breaks out of srun before the allocation takes place, mark the 
    job as CANCELLED rather than COMPLETED and change its start and end time 
    to that time.
 -- Fix bug in PMI support that prevented use of second PMI_Barrier call.
    This fix is needed for MVAPICH2 use.
 -- Add "-V" options to slurmctld and slurmd to print version number and exit.
 -- Fix scalability bug in sbcast.
 -- Fix bug in cons_res allocation strategy.
 -- Fix bug in forwarding with mpi
 -- Fix bug sacct forwarding with stat option
 -- Added nodeid to sacct stat information
 -- cleaned up way slurm_send_recv_node_msg works no more clearing errno
 -- Fix error handling bug in the networking code that causes the slurmd to
    xassert if the server is not running when the slurmd tries to register.

* Changes in SLURM 1.1.0
========================
 -- Fix bug that could temporarily make nodes DOWN when they are really 
    responding. 
 -- Fix bug preventing backup slurmctld from responding to PING RPCs.
 -- Set "CFLAGS=-DISO8601" before configuration to get ISO8601 format 
    times for all SLURM commands. NOTE: This may break Moab, Maui, and/or 
    LSF schedulers.
 -- Fix for srun -n and -O options when paired with -b.
 -- Added logic for fanout to failover to forward list if main node is 
    unreachable 
 -- sacct also now keeps track of submitted, started and ending times of jobs
 -- reinit config file mutex at beginning of slurmstepd to avoid fork issues
  
* Changes in SLURM 1.1.0-pre8
=============================
 -- Fix bug in enforcement of partition's MaxNodes limit.
 -- BLUEGENE - added support for srun -w option also fixed the geometry option
    for srun.

* Changes in SLURM 1.1.0-pre7
=============================
 -- Accounting works for aix systems, use jobacct/aix
 -- Support large (over 2GB) files on 32-bit linux systems
 -- changed all writes to safe_write in srun
 -- added $float to globals.example in the testsuite
 -- Set job's num_proc correctly for jobs that do not have exclusive use 
    of it's allocated nodes.
 -- Change in support for test suite: 'testsuite/expect/globals.example'
    is now 'testsuite/expect/globals' and you can override variable 
    settings with a new file 'testsuite/expect/globals.local'.
 -- Job suspend now sends SIGTSTP, sleep(1), sends SIGSTOP for better
    MPI support.
 -- Plug a bunch of memory leaks in various places.
 -- Bluegene - before assigning a job to a block the plugin will check the bps
    to make sure they aren't in error state.
 -- Change time format in job completion logging (JobCompType=jobcomp/filetxt)
    from "MM/DD HH:MM:SS" to "YYYY-MM-DDTHH:MM:SS", conforming with the ISO8601 
    standard format.
 
* Changes in SLURM 1.1.0-pre6
=============================
 -- Added logic to "stat" a running job with sacct option -S use -j to specify
    job.step 
 -- removed jobacct/bluegene (no real need for this) meaning, I don't think 
    there is a way to gather the data yet.
 -- Added support for mapping "%h" in configured SlurmdLog to the hostname.
 -- Add PropagatePrioProcess to control propagation of a user's nice value 
    to spawned tasks (based upon work by Daniel Christians, HP).
 
* Changes in SLURM 1.1.0-pre5
=============================
 -- Added step completion RPC logic
 -- Vastly changed sacct and the jobacct plugin.  Read documentation for full
    details.
 -- Added jobacct plugin for AIX and BlueGene, they currently don't work, 
    but infrastructure is in place.
 -- Add support for srun option --ctrl-comm-ifhn to set PMI communications
    address (Hongjia Cao, National University of Defense Technology).
 -- Moved safe_read/write to slurm_protocol_defs.h removing multiple copies.
 -- Remove vestigial functions slurm_allocate_resources_and_run() and 
    slurm_free_resource_allocation_and_run_response_msg().
 -- Added support for different executable files and arguments by task based
    upon a configuration file. See srun's --multi-prog option (based upon 
    work by Hongjia Cao, National University of Defense Technology).
 -- moved the way forward logic waited for fanout logic mostly eliminating 
    problems with scalability issues.
 -- changed -l option in sacct to display different params see sacct/sacct.h
    for details.

* Changes in SLURM 1.1.0-pre4
=============================
 -- Bluegene specific - Added support to set bluegene block state to 
    free/error via scontrol update BlockName 
 -- Add needed symbol to select/bluegene in order to load plugin.

* Changes in SLURM 1.1.0-pre3
=============================
 -- Added framework for XCPU job launch support.
 -- New general configuration file parser and slurm.conf handling code.
    Allows long lines to be continued on the next line by ending with a "\".
    Whitespace is allowed between the key and "=", and between the "=" and
    value.
    WARNING: A NodeName may now occur only once in a slurm.conf file.
             If you want to temporarily make nodes DOWN in the slurm.conf,
             use the new DownNodes keyword (see "man slurm.conf").
 -- Gracefully handle request to submit batch job from within an existing 
    batch job.
 -- Warn user attempting to create a job allocation from within an existing job
    allocation.
 -- Add web page description for proctrack plugin.
 -- Add new function slurm_get_rem_time() for job's time limit.
 -- JobAcct plugin renamed from "log" to "linux" in preparation for support of 
    new system types. 
    WARNING: "JobAcctType=jobacct/log" is no longer supported.
 -- Removed vestigal 'bg' names from bluegene plugin and smap
 -- InactiveLimit parameter is not enforced for RootOnly partitions.
 -- Update select/cons_res web page (Susanne Balle, HP, 
    cons_res_doc_patch_3_29_06).
 -- Build a "slurmd.test" along with slurmd. slurmd.test has the path to 
    slurmstepd set allowing it to run unmodified out of the builddir for 
    testing (Mark Grondona).
 
* Changes in SLURM 1.1.0-pre2
=============================
 -- Added "bcast" command to transmit copies of a file to compute nodes
    with message fanout.
 -- Bluegene specific - Added support for overlapping partitions and 
    dynamic partitioning. 
 -- Bluegene specific - Added support for nodecard sized blocks.
 -- Added logic to accept 1k for 1024 and so on for --nodes option of srun. 
    This logic is through display tools such as smap, sinfo, scontrol, and 
    squeue.
 -- Added bluegene.conf man page.
 -- Added support for memory affinity, see srun --mem_bind option.
 
* Changes in SLURM 1.1.0-pre1
=============================
 -- New --enable-multiple-slurmd configure parameter to allow running
    more than one copy of slurmd on a node at the same time.  Only
    really useful for developers.
 -- New communication is now branched on all processes to slurmd's from 
    slurmctld and srun launch command.  This is done with a tree type 
    algorithm.  Spawn and batch mode work the same as before.  New slurm.conf
    variable TreeWidth=50 is default.  This is the number of threads per 
    stop on the tree.  
 -- Configuration parameter HeartBeatInterval is depracated. Now used half
    of SlurmdTimeout and SlurmctldTimeout for communications to slurmd and
    slurmctld daemons repsectively.
 -- Add hash tables for select/cons_res plugin (Susanne Balle, HP, 
    patch_02222006).
 -- Remove some use of cr_enabled flag in slurmctld job record, use 
    new flag "test_only" in select_g_job_test() instead.

* Changes in SLURM 1.0.13
=========================
 -- Fix for AllowGroups option to work when the /etc/group file doesn't 
    contain all users in group by adding the uids of the names in /etc/passwd
    that have a gid of that which we are looking for.
 -- Fix bug in InactiveLimit support that can potentially purge active jobs.
    NOTE: This is highly unlikely except on very large AIX clusters.
 
* Changes in SLURM 1.0.12
=========================
 -- Report node state of DRAIN rather than DOWN if DOWN with DRAIN flag set.
 -- Initialize job->mail_type to 0 (NONE) for job submission.
 -- Fix for stalled task stdout/stderr when buffered I/O is used, and
    a single line exceeds 4096 bytes.
 -- Memory leak fixes for maui plugin (hjcao@nudt.edu.cn)