October 14, 1998 BARRIERD 1

### NAME

barrierd - syncronize a process on a number of machines.

### SYNOPSIS

barrierd [-v] [-p port]

### DESCRIPTION

The barrierd daemon runs on a host, and accepts barrier connections from the client program barrier. It handles the connections and syncronization of various barriers being set up and taken down across the cluster.

-v
  Prints the version of ClusterIt to the stdout, and exits.

-p
  Specifies a port number for the barrierd daemon to listen on. Defaults to 1933, and overrides the ```BARRIER_PORT` environment variable.

### ENVIRONMENT

barrierd utilizes the following environment variables:

```BARRIER_PORT`
  Sets the default remote port to connect to.

### DIAGNOSTICS

Exit status is 0 on success, 1 if an error occurs.

### SEE ALSO

barrier(1), dsh(1),

### HISTORY

The barrierd command appeared in clusterit 1.1.

### AUTHOR

Barrierd was written by Tim Rightnour.

### BUGS

Barrierd can only handle up to 10 unique barrier tokens at any one time. In addition, it can only handle a barrier size of up to 512 nodes. These values can be modified by recompiling the program.