NAME
gfrun, gfrsh, gfssh - run Gfarm parallel programs
SYNOPSIS
gfrun [ options ] command arg ...
gfrsh [ options ] command arg ...
gfssh [ options ] command arg ...
DESCRIPTION
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
gfreg(1).
OPTIONS
-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
list.
-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.
ENVIRONMENT VARIABLES
GFRUN_CMD
Specifies a remote shell command. If globus-job-run is
specified, gfrun executes each process using globus-job-run.
SEE ALSO
gfmpirun_p4(1)