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nemo-mbridge-multi-node-slurm skillB

nemo-mbridge-multi-node-slurm is agent-read markdown (skill) from nvidia/skills: Convert single-node scripts to multi-node Slurm sbatch jobs and debug common multi-node failures. Covers srun-native vs uv run torch.distributed approaches, container setup, NCCL timeouts, OOM sizing for MoE models, and interactive allocation..

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What the file says

# Multi-Node Slurm

Convert single-node `uv run python -m torch.distributed.run` commands into multi-node Slurm sbatch scripts with Enroot container support, and debug common multi-node failures.

## First Answer Checklist

When converting or debugging Bridge multi-node jobs, answer in this order:

1. Prefer the **srun-native** launch shape for Bridge scripts that reach
   `initialize.py`: `#SBATCH --ntasks-per-node=8` and a direct `srun ... uv run
   python <script> ...` launch. Do not wrap these jobs in
   `python -m torch.distributed.run`.
2. State that Bridge derives `RANK`, `WORLD_SIZE`, `LOCAL_RANK`,
   `MASTER_ADDR`, and `MASTER_PORT` from SLURM variables during
   `initialize.py` distributed init.
3. Require shared paths and matching container mounts for the repo, data, logs,
   `HF_HOME`, `UV_CACHE_DIR`, and `NEMO_HOME`.
4. For NCCL timeout reports, do these first-log checks before speculating:
   - grep for real errors while filtering warning/frame noise
   - inspect `Failures:` to find the first failed rank and node
   - grep for `ncclUniqueId`, `timeout`, or `crash on rank 0`

## Two Approaches: srun-native vs uv run torch.distributed
…

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B  16 of 17 checks passed. Deterministic, no model, same answer every run.
  • fail: No script tag (matched: <script)
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (15784 bytes)
  • pass: No zero-width or bidi control characters
  • pass: No instruction hidden inside an HTML comment
  • pass: No link to an exfiltration or paste host
  • pass: No credential-shaped string
  • pass: No instruction to send local credentials anywhere
  • pass: No text hidden with inline styles
  • pass: No prompt-injection phrasing
  • pass: No curl or wget piped into a shell
  • pass: No recursive delete of root, home or parent
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  • pass: No base64 blob over 200 characters
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Source

GitHub

nvidia/skills · 3,415 stars · license Apache-2.0 · pushed 2026-09-23 · branch main

API

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GET https://markdownregistry.com/api/v1/resolve?ref=nvidia/skills/nemo-mbridge-multi-node-slurm
GET https://markdownregistry.com/api/v1/blob/1755991a2310d06d8a98d8576b14ce7e8b14c6bddb0901c4a1eb11350be64535

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