NAME

impi-server - IMPI server

SYNOPSIS

impi-server -server number-of-clients [-help] [-verbose] [-ipv 4/6] [-host hostname] [-port port] [-bg/-fork] [-pid/-getpid] [-nl] [-out filename]

DESCRIPTION

This starts the IMPI server, which is a contact point and an information exchange of MPI processes separately started across multiple clusters. It prints the IP address and the port number at startup, which will be given to the mpirun command as an argument to the -client option. This is specified in the IMPI specification, and users are refered to it.

OPTIONS

The following options are supported:

-server number-of-clients

Specifies the number of expected clusters to use. It is an integer between 1 and 32.

-help

Prints simple help.

-verbose

Be verbose.

[-ipv 4/6]

Specifies IPv4 or IPv6.

-host hostname

Specifies a hostname on which impi-server services.

-port port-number

Specifies a network port number on which impi-server services. An arbitrary port is selected if not specified.

-bg/-fork

Specifies impi-server to fork and let it into background.

-pid/-getpid

Prints pid.

-nl

Prints extra newline after printing the host/port pair.

-out filename

Prints the host/port pair in a file.

ENVIRONMENT VARIABLES

IMPI_AUTH_NONE

Specifies no-authentication.

IMPI_AUTH_KEY=64bit-decimal-integer

Specifies an optional pseudo authentication.

IMPI_SERVER_PORT_RANGE=n0:n1

Specifies port range to listen. Port number from n0 to n1 (inclusive) is tried.

CKPT_RESTART=0 or 1

Specifies restarting from a checkpoint save when set to 1.

_YAMPI_CKPT

Specifies checkpointing is enabled.

_YAMPI_CKPT_SIGNO

Specifies a signal number to start checkpointing.

CHECKPOINT

Specifies checkpointing is enabled on IBM AIX.