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horovod_experiment's Introduction

Horovod Cluster example

Autori:

  • Luca Gregori
  • Alessandro Wood

Prerequisiti

  • docker
  • nvidia-docker: Abilita l'uso della scheda video per i container docker. Guida all'installazione al seguente link.

Setup Horovod cluster

Inizializzazione chiavi SSH

Lo script init-ssh.sh crea le chiavi SSH necessarie all'autenticazione tra i nodi del cluster senza prompt.

chmod +x init-ssh.sh
./init-ssh.sh

Inizializzazione cluster (3 nodi)

docker compose up

All'interno del file docker-compose.yml:

horovodrun -np 3 -H horovod-master:1,horovod-worker-1:1,horovod-worker-2:1 -p 12345 python /horovod/examples/pytorch/pytorch_mnist.py

dove -np 3 indica il numero di processi totali, e horovod-master:1,horovod-worker-1:1,horovod-worker-2:1 la lista dei nodi del cluster (nome-cluster:num_proc).


volumes:
      - ./tmp/.ssh/:/root/.ssh

mapping della cartella .ssh per installare le chiavi SSH dentro ogni nodo del cluster.

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