mcore-run-on-slurm SKILL.md skillA
mcore-run-on-slurm from nvidia/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add nvidia/skills/mcore-run-on-slurm@git:20260529.416539cPins git:20260529.416539c in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- nvidia/skills
- Path
skills/mcore-run-on-slurm/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260529.416539c, committed May 29, 2026
- Size
- 7,235 bytes
- Repository stars
- 3,871
- License
- Apache-2.0
How to launch distributed Megatron-LM training jobs on a SLURM cluster. Covers a minimal sbatch skeleton, environment-variable setup for torch.distributed.run, CUDA_DEVICE_MAX_CONNECTIONS rules across hardware and parallelism modes, container conventions, monitoring, and per-rank failure diagnosis.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Run Megatron-LM on SLURM
## Answer-First Constants
For text-only SLURM setup questions, answer with these constants before the
full script:
- Submit from a shared worktree path visible to every node; `cd` there in the
script before launching training.
- Use one `srun` task per node and launch workers with
`uv run python -m torch.distributed.run`, not bare `torchrun`.
- Set `MASTER_ADDR` from
`scontrol show hostnames "$SLURM_JOB_NODELIST" | head -n1`, set `MASTER_PORT`,
`NNODES=${SLURM_NNODES}`, `GPUS_PER_NODE=<GPUS_PER_NODE>`, and
`WORLD_SIZE=$((NNODES * GPUS_PER_NODE))`.
- Pass `--nnodes`, `--nproc-per-node`, `--node-rank`, `--master-addr`, and
`--master-port` to `torch.distributed.run`.
- `CUDA_DEVICE_MAX_CONNECTIONS`: pre-Blackwell Hopper/Ampere with TP>1 or CP>1
and non-FSDP uses `1`; Blackwell/GB200 does not need it; Torch-FSDP2 or
Megatron-FSDP must not use `1`; `overlap_moe_expert_parallel_comm` uses `32`.
## Prerequisites
- A SLURM cluster login with submission rights to a GPU partition.
…Read the whole file at its exact version.
How to install
mdr add nvidia/skills/mcore-run-on-slurm@sha256:09d08fecad809510The line at the top of this page pins the label git:20260529.416539c, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_e637duyg6crbfecw)
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Versions
The registry has recorded 1 version of this file, committed on May 29, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (7235 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
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
nvidia/skills · 3,871 stars · license Apache-2.0 · pushed 2026-11-05 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_e637duyg6crbfecw GET https://markdownregistry.com/api/v1/resolve?ref=nvidia/skills/mcore-run-on-slurm GET https://markdownregistry.com/api/v1/blob/09d08fecad809510c20ab45b11ce01e8677d78a6f115dbbefc4340927ab8832c
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.