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       gfrun, gfrsh, gfssh - run Gfarm parallel programs


       gfrun [ options ] command arg ...

       gfrsh [ options ] command arg ...

       gfssh [ options ] command arg ...


       gfrun  executes  a  parallel  command  on  filesystem  nodes,  which is
       determined by the -G option, the -H option, or the -N option.

       The -G option specifies the gfarm-URL, which  will  be  used  by  file-
       affinity  scheduling.  In this case, gfrun schedules the same number of
       filesystem  nodes  as  the  number  of  Gfarm  fragments,  taking  into
       consideration  the  physical  locations of each fragment replica of the
       Gfarm file, and filesystem node status.  The -H  option  specifies  the
       hostfile  that  lists  filesystem  nodes.   The -N option specifies the
       number of filesystem nodes.

       The -G, -H, and -N options are exclusive.  When none of the -G, -H,  or
       -N  options  are  specified,  gfrun schedules filesystem nodes by file-
       affinity scheduling using the first existent Gfarm file in the argument
       list, args.  If there are no existent Gfarm files in the argument list,
       an appropriate filesystem node is selected to be executed.

       gfrsh and gfssh utilize rsh and ssh, respectively, instead of gfrcmd.

       A command can be specified by a  gfarm-URL  that  is  registered  using


       -G gfarm-URL
              Specifies  a  Gfarm file gfarm-URL for file-affinity scheduling.
              Please read the  DESCRIPTION  section  about  how  file-affinity
              scheduling works.

       -H hostfile
              Specifies a hostfile that lists filesystem nodes.

              if  ``-''  is specified, standard input is used to read the host

       -N np  Specifies the number of nodes, np, which  are  selected  in  the
              increasing order of load average.

       -r     Specifies  an  on-demand  replication mode.  In this mode, every
              file will be replicated before it is accessed remotely.

       -o gfarm-URL
              Specifies a Gfarm file that the standard output of the  executed
              program will be redirected to.

       -e gfarm-URL
              Specifies  a  Gfarm file that the standard error of the executed
              program will be redirected to.

       -I fragment-index
              Specifies a Gfarm fragment index executed by the gfrun  command.
              This   option   is  available  only  when  either  file-affinity
              scheduling is selected by the -G option or a gfarm file  in  the
              argument list, or the -N option is specified.

       -v     Displays error message verbosely.

       -p     Displays  the  elapsed time of each Gfarm parallel I/O API after
              the program terminates.

       -g     Explicitly specifies that the command is a Gfarm program.  Gfarm
              specific options will be passed to the command as the result.

       -u     Explicitly  specifies  that  the command is an ordinary program,
              and does not take Gfarm specific options.

       -b     Specifies global file view as the default file view for programs
              linked  with  the Gfarm syscall-hooking library.  If this option
              is not specified, the default is local file view.

       -?     Displays a list of command options.


              Specifies  a  remote  shell  command.   If   globus-job-run   is
              specified, gfrun executes each process using globus-job-run.



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