External-GPU path for the time-pressured first round, before the
Windows desktop joins the WG fleet. Lambda is treated as an "external
worker" whose output lands in the same /var/lib/cis490/models/ tree
the receiver-coordinated fleet uses, so cis490-jobs status reflects
Lambda runs identically to fleet runs.
Three scripts + one ingest tool:
scripts/build-lambda-bundle.sh
Tarball at /tmp/cis490-lambda/lambda-bundle-<short>.tar.zst with:
- the repo (sans .git, sans data/, sans artifacts*)
- data/processed/{validation_v1,features_window_v1}.parquet
- data/processed/feature_schema_v1.json
- data/processed/tensor_window_v1/ (npz shards)
- bootstrap.sh (entrypoint)
- training_manifest.toml (the canonical job list)
- BUNDLE_MANIFEST.json (commit hash + counts + build stamp)
Verifies all four data inputs exist BEFORE compressing 5+ GB.
scripts/run-on-lambda.sh ubuntu@<ip>
rsync bundle up → ssh + run bootstrap → rsync artifacts +
reports/eval back to artifacts-lambda/ + reports/lambda/.
Resumable rsync; sha256-verified.
scripts/lambda-bootstrap.sh (runs ON the Lambda instance)
Creates .venv with cu121 torch + xgboost + the [training] deps,
iterates the manifest's job list in priority order (highest first),
runs trainer/run.py (or run_ssl.py for transformer_ssl) per job,
skips jobs whose .ckpt.json already exists (idempotent on re-run),
writes per-job logs/<model>_<mode>.log, runs eval suite at the end,
stamps artifacts/RUN_SUMMARY.json with counts + failed-job list.
tools/ingest_lambda_artifacts.py
Bundles each (ckpt.json + sidecar + train.json) trio into a
.tar.zst, sha256, PUTs to the local trainer-receiver's
/v1/model/{job_id}, marks the job complete. Maps (model, mode) →
job_id by re-reading the canonical manifest. Handles the queue
state churn (requeue if completed, claim if pending, fail-back
on race losses).
End-to-end smoke verified on the A100 instance just provisioned:
- SSH from Pi via ed25519 keypair (cis490-trainer-pi)
- GPU: A100-SXM4-40GB, driver 580.105.08
- venv warmed: torch 2.5.1+cu121, xgboost 3.2.0
- 464 GB ephemeral disk available
Pi-side feature build (build_features.py + build_tensors.py against
all 72,952 accepted+degraded episodes) is in progress; bundle build
gates on its completion. Estimated wall-clock for the full Lambda
training run on A100: ~2.5 hours for 12 supervised + 2 SSL models +
eval suite.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
