NAME

mpinamed - Very simple MPI name service

SYNOPSIS

mpinamed [-h] [-d] [-v]

DESCRIPTION

mpinamed minimally implements MPI name service defined in MPI-2.0. It should be run with an environment variable _YAMPI_NAMESERVER=host:port. It starts a name service on the port, ignoring the host part. Running name service is necessary when to use MPI_Publish_name, MPI_Unpublish_name, and MPI_Lookup_name. MPI processes connects to the name service specified by _YAMPI_NAMESERVER.

OPTIONS

The following options are supported:

-h

Prints help.

-d or -v

Prints verbose information on actions.

EXIT STATUS

mpinamed never ends.

ENVIRONMENT VARIABLES

_YAMPI_NAMESERVER=host:port

Specifies the port the name server listens on. The host part is ignored.

IMPI_AUTH_KEY=64bit-decimal-integer

Specifies an optional pseudo authentication. If it is set, mpinamed first requires a client of the sevice (an MPI process) to send the value of the variable to match the keys between mpinamed and a client.

SIGNALS

mpinamed dumps key-value pairs currently held on receiving a QUIT signal.