Major update for v2.1 release

RELEASE_NOTES

 RELEASE NOTES FOR SLURM VERSION 2.1
-1 June 2009 (after SLURM 2.1.0-pre1)
+14 October 2009 (through SLURM 2.1.0-pre4)
 
 
 IMPORTANT NOTE:
@@ -24,25 +24,90 @@ doc/html/configurator.html that comes with the distribution.
 
 
 HIGHLIGHTS
-* Support has been added for Solaris.
+* The sched/gang plugin has been removed. The logic is now directly within the 
+  slurmctld daemon so that gang scheduling and/or job preemption can be 
+  performed with a backfill scheduler.
+* Preempted jobs can now be canceled, checkpointed or requeued rather than 
+  only suspended.
+* Support for QOS (Quality Of Service) has been added to the accounting 
+  database with configurable limits, priority and preemption rules.
+* Added -"-signal=<int>@<time>" option to salloc, sbatch and srun commands to
+  notify programs before reaching the end of their time limit.
+* Added squeue option "--start" to report expected start time of pending jobs.
+* 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.
+* Support has been added for OpenSolaris.
 
 
 CONFIGURATION FILE CHANGES (see "man slurm.conf" for details)
+* Added PreemptType parameter to specify the plugin used to identify 
+  preemptable jobs (partition priority or quality of service) and 
+  PreemptionMode to identify how to preempt jobs (requeue, cancel, checkpoint,
+  or suspend).
+* The sched/gang plugin has be removed, use PreemptType=preempt/partition_prio
+  and PreemptMode=suspend,gang.
+* ControlMachine changed to  accept multiple comma-separated hostnames for 
+  support of some high-availability architectures.
+* Added MaxTasksPerNode to control how many tasks that the slurmd can launch.
+* Removed SrunIOTimeout parameter.
+* Added 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.
 
 
 COMMAND CHANGES (see man pages for details)
+* Added a --detail option to "scontrol show job" to display the cpu/memory
+  allocation informaton on a node-by-node basis.
+* sacctmgr show problems command added to display problems in the accounting 
+  database (e.g. accounts with no users, users with no UID, etc.)
 * Several redundant squeue output and sorting options have been removed: 
   "%o" (use %D"), "%b" (use "%S"), "%X", %Y, and "%Z" (use "%z").
 * Standardized on the use of the '-Q' flag for all commands that offer the
   --quiet option.
+* salloc's --wait=<secs> option deprecated by --immediate=<secs> option to 
+  match the srun command.
+* Scalability of sview dramatically improved.
+* Added reservation flag of "OVERLAP" to permit a new reservation to use
+  nodes already in another reservation.
+* Added sacct ability to use --format NAME%LENGTH similar to sacctmgr.
+* 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).
+* 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).
+
+
+BLUEGENE SPECIFIC CHANGES
+* scontrol show blocks option added.
+* scontrol delete block and update block can now remove blocks on dynamic 
+  layout configuration.
+* sinfo and sview now display correct CPU counts for partitions.
+* Jobs waiting for a block to boot will now be reported in Configuring state.
+* Vastly improve dynamic layout mode algorithm.
+* Environment variables 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.
+
 
 OTHER CHANGES
-* A mechanism has beeded added for SPANK plugins to set environment variables 
+* A mechanism has been added 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.
+* Set a node's power_up/configuring state flag while PrologSlurmctld is
+  running for a job allocated to that node.
+* Added sched/wiki2 (Moab) JOBMODIFY command support for VARIABLELIST option
+  to set supplemental environment variables for pending batch jobs.
 * The RPM previously named "slurm-aix-federation-<version>.rpm" has been 
   renamed to just "slurm-aix-<version>.rpm" (the federation switch plugin may 
   not be present).
-* Added sched/wiki2 (Moab) JOBMODIFY command support for VARIABLELIST option
-  to set supplemental environment variables for pending batch jobs.
+* Environment variables SLURM_TOPOLOGY_ADDR and SLURM_TOPOLOGY_ADDR_PATTERN
+  added to describe the network topology for each launched task when 
+  TopologyType=topology/tree is configured
+* Add new job wait reason, ReqNodeNotAvail: Required node is not available 
+  (down or drained).