---
name: "dmtcp_coordinator"
section: "1"
platform: "linux"
package: "dmtcp"
version: "4.2.0-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/dmtcp_coordinator"
---

# dmtcp\_coordinator(1)

## NAME

**dmtcp\_coordinater** -- coordinates checkpoints among multiple processes.

## SYNOPSIS

**dmtcp\_coordinater** \[*OPTIONS*\]

## DESCRIPTION

**dmtcp\_coordinator** coordinates checkpoints among multiple processes.

## OPTIONS

- **-p**,

  **--coord-port** *port* (environment variable DMTCP\_COORD\_PORT)\
    Port to listen on (default: 7779)

- **--port-file** *filename*

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

- **--ckptdir** *path* (environment variable DMTCP\_CHECKPOINT\_DIR)

   Directory to store dmtcp\_restart\_script.sh (default: ./)

- **--tmpdir** *path* (environment variable DMTCP\_TMPDIR)

   Directory to store temporary files (default: env var TMDPIR or /tmp)

- **--exit-on-last**

   Exit automatically when last client disconnects

- **--exit-after-ckpt**

   Exit automatically after checkpoint is created

- **--daemon**

   Run silently in the background after detaching from the parent process.

- **-i**,

  **--interval** *\<val\>* (environment variable DMTCP\_CHECKPOINT\_INTERVAL)\
    Time in seconds between automatic checkpoints (default: 0, disabled)

- **-q**, **--quiet**

   Skip copyright notice.

- **--help**

   Print this message and exit.

- **--version**

   Print version information and exit.

### Commands for Coordinator

**l**: List connected nodes\
 **s**: Print status message\
 **c**: Checkpoint all nodes\
 **i**: Print current checkpoint interval\
    (To change checkpoint interval, use dmtcp\_command)\
 **k**: Kill all nodes\
 **q**: Kill all nodes and quit\
 **?**: Show this message\

## REPORTING BUGS

Report bugs to: dmtcp-forum@lists.sourceforge.net\
 DMTCP home page: \<http://dmtcp.sourceforge.net\>

## SEE ALSO

[**dmtcp**(1)](/dmtcp/1.md), [**dmtcp\_coordinator**(1)](/dmtcp_coordinator/1.md), [**dmtcp\_launch**(1)](/dmtcp_launch/1.md), [**dmtcp\_restart**(1)](/dmtcp_restart/1.md), [**dmtcp\_command**(1)](/dmtcp_command/1.md)

## AUTHOR

See /usr/share/doc/dmtcp-3.0.0/AUTHORS.

## VERSION

DMTCP version 3.0.0 of November, 2017.

## COPYRIGHT

See /usr/share/doc/dmtcp-3.0.0/COPYING file.

License LGPLv3+: GNU LGPL version 3 or later \<http://gnu.org/licenses/lgpl.html\>.

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.