---
name: "hydra_nameserver"
section: "1"
platform: "linux"
package: "mpich-doc"
version: "4.0.2-3"
release: "Debian 12 (Bookworm)"
platforms: ["linux"]
url: "https://new.carta.tech/hydra_nameserver"
---

# hydra\_nameserver(1)

program to support MPI s name publishing features with hydra

## NAME

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

. vb shell@myhost1$ hydra\_nameserver & shell@myhost1$ mpiexec -hosts myhost1,myhost2 -n 4 -nameserver myhost1 ./a.out . ve

## LOCATION

/tmp/WUlL2ojnWJ/mpich-4.0.1/src/pm/hydra/tools/nameserver/hydra\_nameserver.txt