This is the size of the container ID in the current SGI_JOB (PAGG)
library.

    which is a wrapper over Cray's aprun command and supports many srun
    options. Without this option, the srun command will advise the user
    to use the aprun command.

    which is a wrapper over Cray's aprun command and supports many srun
    options. Without this option, the srun command will advise the user
    to use the aprun command.

    --resv-ports option is used.

BLUEGENE - when running in overlap mode make sure to check the connection type so you can create overlapping blocks on the exact same nodes with different connection types (i.e. one torus, one mesh).

   HWLOC_API_VERSION

 the presence of the man2html utility.

20.2, 20.4 and 7.3 from running with select/bluegene

so that we can resolve xstrdup() to slurm_xstrdup().

and dependency clearing logic

This removes a function "slurm_pack_msg_no_header" which is nowhere referenced
in the src tree and which also is not listed in any of the slurm manpages.

As far as I understand the documentation, each slurm message needs to have a
header, it could thus be that this function is from very old or initial code.

This removes a duplicated test statement which appears identically twice.

This adds support for the SLURM_CLUSTERS environment variable also for sprio.
It also makes the test for the priority plugin type dependent on whether
running with multiple cluster support or not.

On our frontend host we support multiple clusters (Cray and non-Cray) by
setting the SLURM_CLUSTERS environment variable accordingly.

In order to use scontrol (e.g. for hold/release of a user job) from a
frontend host to control jobs on a remote Cray system, we need support for
the SLURM_CLUSTERS environment variable also in scontrol.

The current code erases the old nice value (both negative and positive) when a job is
put on hold so that the job has a 0 nice component upon release.

This interaction causes difficulties if the nice value set at submission time had been
set there for a reason, for instance when
 * a system administrator has allowed to set a negative nice value;
 * the user wanted to keep this as a low-priority job and wants his/her other jobs
   to go first (indenpendent of the hold option);
 * the nice value is used for other semantics - at our site for instance, we use it
   for computed "base priority values" that are computed by looking at how much of
   their quota a given group has already (over)used.

Here is an example which illustrates the loss of original nice values:

  [2011-03-31T09:47:53] sched: update_job: setting priority to 0 for job_id 55
  [2011-03-31T09:47:53] sched: update_job: setting priority to 0 for job_id 66
  [2011-03-31T09:47:53] sched: update_job: setting priority to 0 for job_id 77
  [2011-03-31T09:47:54] sched: update_job: setting priority to 0 for job_id 88
  [2011-03-31T09:47:54] sched: update_job: setting priority to 0 for job_id 99
  [2011-03-31T09:47:54] sched: update_job: setting priority to 0 for job_id 110

This is from user 'kraused' whose project 's310' is within the allocated quota and thus
has an initial nice value of -542 (set via the job_submit/lua plugin).

However, by putting his jobs on hold, he has lost this advantage:

  JOBID     USER   PRIORITY        AGE  FAIRSHARE    JOBSIZE  PARTITION        QOS   NICE
     55  kraused      15181        153          0       5028      10000          0      0
     66  kraused      15181        153          0       5028      10000          0      0
     77  kraused      15181        153          0       5028      10000          0      0
     88  kraused      15178        150          0       5028      10000          0      0
     99  kraused      15178        150          0       5028      10000          0      0
    110  kraused      15178        150          0       5028      10000          0      0

I believe that resetting the nice value has been there for a reason, thus the patch prevents
reset of current nice value only if the operation is not user/administrator hold.

This fixes a problem when trying to move a pending job from one partitition to another
while not supplying any other parameters:
 * if a partition value is present, the job is pending and no min_nodes are supplied,
   the job_specs->min_nodes get set from the detail_ptr value;
 * this causes subsequent tests for job_specs->min_nodes ==/!= NO_VAL to fail.

The following illustrates the behaviour, the example is taken from our system:
  palu2:0 ~>scontrol update jobid=3944 partition=night
  slurm_update error: Requested operation not supported on this system

  slurmctld.log
  [2011-04-06T14:39:51] update_job: setting partition to night for job_id 3944
  [2011-04-06T14:39:51] Change of size for job 3944 not supported
  [2011-04-06T14:39:51] updating accounting
  [2011-04-06T14:39:51] _slurm_rpc_update_job JobId=3944 uid=21215: Requested operation not supported on this system

==> The 'Change of size for job 3944' reveals that the !select_g_job_expand_allow() case was triggered,
    after setting the job_specs->min_nodes due to supplying a job_specs->partition.

Fix:
====
 Since the test for select_g_job_expand_allow() is not dependent on the job state, moved it up, before
 the test for the job_specs->partition. At the same time, also moved the equality for INFINITE/NO_VAL
 min_nodes values to the same place.
 Tests for job_specs->min_nodes below the job_specs->partition setting depend on the job state, 
 - the 'Reset min and max node counts as needed, insure consistency' requires pending state;
 - the other remaining test is only for IS_JOB_RUNNING/SUSPENDED.

This patch avoids that the priority is not recalculated on 'scontrol release',
which  happens when an authorized operator releases a job, or if the job is
released via e.g. the job_submit plugin.

The patch reorders the tests in update_job() to 
 * test first if the job has been held by the user and, only if not,
 * test whether an authorized operator changed the priority or
   the updated priority is being reduced.

Due to earlier permission checks, we have either
 * job_ptr->user_id == uid or 
 * authorized,
where in both cases the release-user-hold operation is authorized.