Ubuntu Manpage: pexec - executing commands in parallel

NAME

       pexec - executing commands in parallel

SYNOPSIS

       pexec [options] [-c|-m] [--] command [arguments] | 'compound command'

DESCRIPTION

       Execute commands or shell scripts in parallel on a single host or on remote hosts using a remote shell.

OPTIONS

General options:
-h, --help
Gives general summary about the command line options.

--long-help
Gives a detailed list of command line options.

--version
Gives some version information about the program.

-s, --shell <shell>
Full path (e.g. /bin/sh) of the shell or interpreter to be used for script execution.

-c, --shell-command
Use the specified shell to interpret the command(s) instead of direct execution.

-m, --multiple-command
Allow multiple individual shell command scripts to be executed in parallel with the variation of
the parameters.

-e, --environment <variable>
Name of an environmental variable which is set to the respective parameter before each execution.

-n, --number <number>
The maximal number of processes running simultaneously. The <number> itself can even be a complex
specification of remote hosts (see documentation for more details).

-C, --control <port>
The control port of a hypervisor daemon (full path of a UNIX socket or an INET host
specification).

-p, --list <list>
The single-argument form of main parameter list.

-r, --parameters <list>
The multiple-argument form of the main parameter list.

-f, --listfile <file>
The main parameter list file.

-w, --column <index>
The column index from where the parameters should be taken if they are read from a parameter file.

-t, --complete
Threat the whole line as a single parameter if the parameters are read from a file.

-z, --nice
Sets the scheduling priority of pexec and all children (executed processes) to the priority
defined by this nice value.

-- A marker after which the command to execute begins.

Redirecting standard input, output and error:
-i, --input <input>
The (optionally formatted) name of the input file which is used for redirecting the standard
input.

-o, --output <output>
The (optionally formatted) name of the output file which is used for redirecting the standard
output.

-u, --error <output>
The (optionally formatted) name of the output error file, which is used for redirecting the
standard error.

-R, --normal-redirection
Equivalent to specifying --output -, --error - and --input /dev/null.

-a, --output-format <format>
The format of the final standard output redirection if the output of all of the processes are
gathered into the same file.

-b, --error-format <format>
The same final redirection format for the standard error.

-x, --omit-newlines
Disable automatic newlines after the output and error formats.

Execution using remote hosts:
-g, --remote-shell <remote_shell>
The name or full path of the remote shell to be used for building the tunnel between the local and
the peer host(s). Default: ``/usr/bin/ssh''.

-P, --pexec <pexec>
The full path of the pexec program on the remote hosts. If this option is omitted, pexec tries to
figure out from the invoking syntax and/or the current path.

-T, --tunnel
Internal use only (pexec will start in tunnel daemon mode).

Remote control, mutual exclusions and atomic command execution:
-y, --bind <port>
This option lets pexec to be remote controlled via INET or UNIX domain sockets.

-E, --pexec-connection-variable <env>
This option overrides the default environment name PEXEC_REMOTE_PORT to the specified value, which
is used by the ``-p|--connect auto'' combination to determine the control socket with which the
running pexec instance can be controlled.

-j, --remote
Used to remote control and/or poll the status of other running instances of pexec.

-p, --connect <port>
Remote control port to connect to.

-t, --status
Prints the actual status of the running jobs in a human-readable form.

-l, --lock <mutex>
Locks the specified mutex (if the mutex is not locked by someone else, otherwise it will block
until the mutex is released).

-u, --unlock <mutex>
Unlocks the specified mutex.

-m, --mutex <mutex>
Name of the mutex.

-d, --dump <filename>
Dump the content of the given file to standard output, if ``-m|--mutex'' is given, this will be
atomic.

-s, --save <filename>
Save the content of standard input to the given file, if ``-m|--mutex'' is given, this will be
atomic.

-a, --atomic <command>
Execute the given command. If ``-m|--mutex'' is given, the exectution is going to be atomic with
respect to that mutex.

Hypervisor mode:
-H, --hypervisor
Starts pexec in hypervisor mode.

-C, --control <port>
The control port used by the hypervisor.

-l, --load <window>
Use load also to limit the number of simultaneous processes with the specified load average
interval (0, 1 or 2, or 1min, 5min or 15min, respectively).

-f, --fifo
First in first out queue processing.

-s, --lifo
Last in first out (stack) queue processing (default).

Logging:
-L, --log <file>
The name of the log file.

-W, --log-level <level>
The logging level.

-V, --verbose
Increase the log level by one.

REPORTING BUGS

       Report bugs to <apal@szofi.elte.hu>

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