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shotime's avatar
shotime
Brass Contributor
Dec 13, 2024

HPC run MPI Service on different segment

Hi All, My environment, Head Node HA and Compute Nodes, some compute nodes are in different network segments but only have one network adapter and ip. When running sonme MPI jobs or diagnostic tests...
hpc
ItsBhatti's avatar
ItsBhatti
Iron Contributor
Dec 15, 2024

To run an MPI service across different network segments in an HPC setup:

  1. Ensure Connectivity: Make sure nodes can communicate across segments with proper routing and open ports.
  2. Use Hostfile: List all participating nodes in an MPI hostfile, including their IP addresses or FQDNs.
  3. Configure Network Interfaces: Specify the correct network interfaces for MPI to use.
  4. Adjust Firewalls: Open required ports or disable firewalls temporarily for testing.
  5. Enable SSH: Set up passwordless SSH between nodes for seamless communication.
  6. Check Subnet Routing: Ensure routes between subnets are properly configured, either on the nodes or via network routers.
  7. Test and Debug: Use verbose options to troubleshoot MPI communication issueshttps://aiwriterpro.org

This ensures that MPI processes can communicate effectively across different network segments.

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