NAME

       pbs - general information on pbs

DESCRIPTION

       PBS  stands  for  Portable  Batch  System.   It  is  a networked subsystem for submitting,
       monitoring, and controlling a work load of batch  jobs  on  one  or  more  systems.   More
       information about PBS is available in the PBS Users Guide.

       Batch means that the job will be scheduled for execution at a time chosen by the subsystem
       according to a defined policy and the availability of resources.  For a normal batch  job,
       the  standard  output and standard error of the job will be returned to files available to
       the user when the job is complete.    This  differs  from  an  interactive  session  where
       commands are executed when entered via the terminal and output is returned directly to the
       terminal.   PBS also supports an interactive batch mode where  the  input  and  output  is
       connected  to the user's terminal, but the scheduling of the job is still under control of
       the batch system.

       A job is typically a shell script and a set  of  attributes  which  provide  resource  and
       control  information  about  the  job.   A job does not have to be submitted on the system
       where it will run, tt can be submitted on any system with the PBS commands and  access  to
       the  execution system, see qsub(1B).  Output will be returned to the system from which the
       job was submitted unless directed otherwise.

       Attributes offer control over when a job is eligible to be run, what happens to the output
       when  it  is  completed and how the user is notified when it completes.  The attributes of
       the job may be specified on the command line  or  in  the  job  script  when  the  job  is
       submitted.  For information about job attributes, see qsub(1B) and pbs_job_attributes(7B).

       One  important  attribute is the resource list.  The list specifies the amount and type of
       resources needed by the job in order to execute.   The list  also  implies  a  hard  upper
       limit on usage of those resources.  When the limit is reached, the job is terminated.  The
       types of resources available to a job vary with the system architecture.  For  a  list  of
       resources supported on the default system, see pbs_resources(7B).  There are man pages for
       other  systems  types  as  well,  see  pbs_resources_aix4(7B),  pbs_resources_fujitsu(7B),
       pbs_resources_irix5(7B),         pbs_resources_solaris5(7B),        pbs_resources_sp2(7B),
       pbs_resources_sunos4(7B), or pbs_resources_unicos8(7B).

       Once a job has been submitted, it may be monitored by use of the qstat(1B)  command.   Two
       forms  of  output  are  available  with  the qstat command.  The default form is the short
       display.   Information about a job is limited to a  single  line.    Complete  information
       about  the job or jobs is available through qstat with the -f option.  Information will be
       given about all jobs in the system, all jobs in specified queues, or only specified jobs.

       When displaying status of jobs, you will see in which queue the job  resides.   In  PBS  a
       queue is just a collection point for jobs, it does not imply any execution ordering.  That
       ordering is determined by a scheduling policy implemented by the system administration.

       Other commands of interest which have man pages of their own are:

       qalter  Alter a job's attributes.

       qdel    Delete a job.

       qhold   Place a hold on a job to keep it from being scheduled for running.

       qmove   Move a job to a different queue or server.

       qmsg    Append a message to the output of an executing job.

       qrerun  Terminate an executing job and return it to a queue.

       qrls    Remove a hold from a job.

       qselect Obtain a list of jobs that met certain criteria.

       qsig    Send a signal to an executing job.

SEE ALSO

       qalter(1B), qdel(1B), qhold(1B), qmove(1B), qmsg(1B), qrerun(1B),  qrls(1B),  qselect(1B),
       qsig(1B), qsub(1B) and the PBS User Guide.  Starting with qsub(1B), you can find all other
       available PBS man pages by following references in the "See Also" section.