dmtcp_launch(1) start a process under DMTCP control.


dmtcp_launch [OPTIONS] <command> [args...]


dmtcp_command is a tool to send user commands to the dmtcp_coordinator remotely.


Connecting to the DMTCP Coordinator

-h, --host hostname (environment variable DMTCP_HOST)

 Hostname where dmtcp_coordinator is run (default: localhost) 

-p, --port port (environment variable DMTCP_PORT)

 Port where dmtcp_coordinator is run (default: 7779) 

--port-file filename

 File to write listener port number.  (Useful with --port 0, which is used to assign a random port)

-j, --join

 Join an existing coordinator, raise error if one doesn't  already exist


 Create a new coordinator at the given port. Fail if one  already exists on the given port. The port can be specified with --port, or with environment variable DMTCP_PORT. If no port is specified, start coordinator at a random port (same as specifying port '0').


 Execute the process in stand-alone coordinator-less mode.
Use dmtcp_command or --interval to request checkpoints.

-i, -interval seconds (environment variable DMTCP_CHECKPOINT_INTERVAL)

 Time in seconds between automatic checkpoints.  0 implies never (manual ckpt only); if not set and no env var, use default value set in dmtcp_coordinator or dmtcp_command. Not allowed if --join is specified

Checkpoint image generation

--gzip, --no-gzip (environment variable DMTCP_GZIP=[01])

 Enable/disable compression of checkpoint images (default: 1 (enabled))
WARNING: gzip adds seconds. Without gzip, ckpt is often < 1s

--ckptdir path (environment variable DMTCP_CHECKPOINT_DIR)

 Directory to store checkpoint images (default: curr dir at launch) 


 Checkpoint open files and restore old working dir. (default: do neither) 


 Deprecated. Use --ckpt-open-files instead.

--ckpt-signal signum

 Signal number used internally by DMTCP for checkpointing (default: 12) 

--mtcp-checkpoint-signal signum

 Deprecated. Use --ckpt-signal instead.

Enable/disable plugins

--with-plugin plugins (environment variable DMTCP_PLUGIN)

 Colon-separated list of DMTCP plugins to be preloaded with DMTCP.  (Absolute pathnames are required.)

--batch-queue, --rm

 Enable support for resource managers (Torque PBS and SLURM).  (default: disabled)


 Enable support for PTRACE system call for gdb/strace etc. (default: disabled) 


 Update environment variables based on the environment on the restart host  (e.g., DISPLAY=$DISPLAY). This can be set in a file dmtcp_env.txt. (default: disabled)

--ib, --infiniband

 Enable InfiniBand plugin. (default: disabled) 

--disable-alloc-plugin (environment variable DMTCP_ALLOC_PLUGIN=[01])

 Disable alloc plugin (default: enabled). 

--disable-dl-plugin (environment variable DMTCP_DL_PLUGIN=[01])

 Disable dl plugin (default: enabled). 

--disable-all-plugins (EXPERTS ONLY, FOR DEBUGGING)

 Disable all plugins. 

Other options

--prefix path

 Prefix where DMTCP is installed on remote nodes. 

--tmpdir path (environment variable DMTCP_TMPDIR)

 Directory to store temporary files  (default: $TMDPIR/dmtcp-$USER@$HOST or /tmp/dmtcp-$USER@$HOST)

-q, --quiet (or set environment variable DMTCP_QUIET = 0, 1, or 2)

 Skip NOTE messages; if given twice, also skip WARNINGs 


 Print this message and exit. 


 Print version information and exit. 


Report bugs to: [email protected]
DMTCP home page: <>


See /usr/share/doc/dmtcp-2.2/AUTHORS.


DMTCP version 2.2 of March 2014.


See /usr/share/doc/dmtcp-2.2/COPYING file.

License LGPLv3+: GNU LGPL version 3 or later <>.

This program comes with ABSOLUTELY NO WARRANTY. This is free software, and you are welcome to redistribute it under certain conditions; see COPYING file for details.