Section: User Commands (1)Updated: 2009-03-06Local indexUp
NAME
mdm-run - run a command in parallel with mdm-master
SYNOPSIS
mdm-runcommand mdm-synccommand
DESCRIPTION
mdm-run
annotates
command
as a candidate for parallel execution.
If an
mdm-master
process is present (i.e., the environment variable
MDM_CMD_SOCK
is defined),
mdm-run
submits
command
to the
mdm-master,
and it exits when the master issues the
command
to an
mdm-slave
process (which may be connected to another terminal) for execution.
mdm-sync
runs
command
in place, but it coordinates with
mdm-master
to ensure that executing
command
does not interfere with commands that are currently executing in parallel.
If there is no
mdm-master
process present (i.e., the environment variable
MDM_CMD_SOCK
is not defined), both
mdm-run
and
mdm-sync
simply run
command
as if you entered
command
all by itself.
These programs are a part of the Middleman System (mdm).
OPTIONS
Neither
mdm-run
nor
mdm-sync
accepts any options.
EXIT STATUS
If there is no
mdm-master
process present, the exit status of
mdm-run
is the exit status of
command.
If an
mdm-master
process is present,
the exit status is 0 if and only if
command
is successfully issued to an
mdm-slave
process for execution.
The exit status of
mdm-sync
is always the exit status of
command.
ENVIRONMENT
The mdm system uses the following environment variable for internal
communication, and thus you should not try to set them yourself.
MDM_CMD_SOCK
mdm-run
uses this environment variable to decide whether a
mdm-master
process is present.