NCCL+MIG Support Arrives: Emulate Multi-Node 3D Parallelism on a Single GPU
StasBekman · x · 2026-08-31
Stas Bekman announces that NCCL+MIG is now working, allowing developers to emulate multi-node 3D parallelism setups on a single node with limited GPUs.
Key points:
- Uses DeepSpeed launcher and SSH config to simulate multi-node communication between local GPUs.
- Setup involves creating a hostfile, configuring passwordless SSH, and handling local loopback connections.
- This lowers the barrier for debugging distributed training workloads without needing expensive 8-GPU clusters.
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