# hydra_nameserver

program to support MPI`s name publishing features with hydra

## Description

Hydra is the default name service for MPI\`s name publishing features (MPI_PUBLISH_NAME/MPI_LOOKUP_NAME). For programs launched by separate hydra instances, a separate nameserver mechanism need be launched in order for the name publishing to work across multiple process managers.

This can be achieved with hydra_nameserver. For example:

        shell@myhost1$ hydra_nameserver &
        shell@myhost1$ mpiexec -hosts myhost1,myhost2 -n 4 -nameserver myhost1 ./a.out

Location:/var/tmp/dTI2qAHwey/mpich-4.1.1/src/pm/hydra/mansrc/hydra_nameserver.txt