Provided by: gridengine-exec_6.2~beta2-2_i386 bug

NAME

       ge_shepherd - Grid Engine single job controlling agent

SYNOPSIS

       ge_shepherd

DESCRIPTION

       ge_shepherd provides the parent process functionality for a single Grid
       Engine job.  The parent functionality is necessary on UNIX  systems  to
       retrieve  resource usage information (see getrusage(2)) after a job has
       finished. In addition, the ge_shepherd forwards  signals  to  the  job,
       such  as the signals for suspension, enabling, termination and the Grid
       Engine checkpointing signal (see ge_ckpt(1) for details).

       The ge_shepherd receives information about the job to be  started  from
       the ge_execd(8).  During the execution of the job it actually starts up
       to 5 child processes. First a prolog script is run if this  feature  is
       enabled  by  the  prolog  parameter  in the cluster configuration. (See
       ge_conf(5).)  Next a parallel environment startup procedure is  run  if
       the job is a parallel job. (See sge_pe(5) for more information.)  After
       that, the job  itself  is  run,  followed  by  a  parallel  environment
       shutdown  procedure  for parallel jobs, and finally an epilog script if
       requested by the epilog parameter in  the  cluster  configuration.  The
       prolog  and  epilog scripts as well as the parallel environment startup
       and  shutdown  procedures  are  to  be  provided  by  the  Grid  Engine
       administrator  and  are  intended for site-specific actions to be taken
       before and after execution of the actual user job.

       After the  job  has  finished  and  the  epilog  script  is  processed,
       ge_shepherd  retrieves  resource usage statistics about the job, places
       them in a job specific subdirectory of the ge_execd(8) spool  directory
       for reporting through ge_execd(8) and finishes.

       ge_shepherd  also  places  an  exit status file in the spool directory.
       This exit status can be viewed with qacct -j JobId (see  qacct(1));  it
       is  not the exit status of ge_shepherd itself but of one of the methods
       executed by ge_shepherd.  This exit status can have  several  meanings,
       depending  on in which method an error occurred (if any).  The possible
       methods are:  prolog,  parallel  start,  job,  parallel  stop,  epilog,
       suspend, restart, terminate, clean, migrate, and checkpoint.

       The following exit values are returned:

       0      All methods: Operation was executed successfully.

       99     Job script, prolog and epilog: When FORBID_RESCHEDULE is not set
              in the configuration (see ge_conf(5)), the job  gets  re-queued.
              Otherwise see "Other".

       100    Job  script,  prolog and epilog: When FORBID_APPERROR is not set
              in the configuration (see ge_conf(5)), the job  gets  re-queued.
              Otherwise see "Other".

       Other  Job script: This is the exit status of the job itself. No action
              is taken upon this exit status because the meaning of this  exit
              status is not known.
              Prolog,  epilog  and  parallel  start: The queue is set to error
              state and the job is re-queued.
              Parallel stop: The queue is set to error state, but the  job  is
              not   re-queued.   It   is  assumed  that  the  job  itself  ran
              successfully and only the clean up script failed.
              Suspend,  restart,  terminate,  clean,   and   migrate:   Always
              successful.
              Checkpoint: Success, except for kernel checkpointing: checkpoint
              was not successful, did not happen (but migration will happen by
              Grid Engine).

RESTRICTIONS

       ge_shepherd should not be invoked manually, but only by ge_execd(8).

FILES

       sgepasswd    contains    a    list    of   user   names    and    their
       corresponding encrypted passwords. If  available,  the  password   file
       will  be   used   by  sge_shepherd. To change the contents of this file
       please use the sgepasswd command. It is not  advised  to   change  that
       file manually.
       <execd_spool>/job_dir/<job_id>     job specific directory

SEE ALSO

       ge_intro(1), ge_conf(5), ge_execd(8).

COPYRIGHT

       See ge_intro(1) for a full statement of rights and permissions.