hydra_nameserver(1)

👑 NAME 👑

hydra_nameserver — section 1 of the manual, bestie. It's the lil program that holds it down for MPI's name publishing features when you're rolling with hydra. 💅

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✨ DESCRIPTION ✨

Okay so first of all, Hydra is literally the default name service for MPI's name publishing features, aka MPI_PUBLISH_NAME and MPI_LOOKUP_NAME. Periodt. 🫶

But here's the tea 🍵 — if your programs got launched by separate hydra instances, then a separate nameserver mechanism has to be launched too, otherwise the name publishing is not gonna work across multiple process managers. It's giving "two friend groups, no group chat." 😭

And that's exactly what hydra_nameserver is for. Enter the main character. 👑

For example:

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

Notice the & in there — that first one goes to the background so your shell stays free. Slay. 🔥

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📍 LOCATION 📍

This page lives at:

/var/tmp/vc8XKeIJUJ/mpich-5.0.1/src/pm/hydra/mansrc/hydra_nameserver.txt

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ngl this one's short and sweet — no options, no flags, no drama. The whole job is: launch it, and name publishing across multiple process managers works. That's it, that's the vibe. 🌈

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And that's the whole page, bestie! 💖 Sourced straight from HYDRA, dated 4/10/2026 — go forth and publish them names, fr fr. 🧚✨