Graham McIntire
690a3523e2
First step of the disk-backed scores migration from the DuckDB plan doc. Ended up shipping the raw-binary variant instead of Parquet because the data is disposable after ~2h — the ecosystem benefits of Parquet only pay off for long-lived datasets, and the binary path has zero new dependencies. Microwaveprop.Propagation.ScoresFile writes one file per (band_mhz, valid_time) tuple under the configured scores dir, default /data/scores in prod and priv/dev_scores in dev. Layout is a 33-byte header plus a dense n_rows × n_cols uint8 array (255 is the no-data sentinel). The whole CONUS grid serializes to ~93 KB per band, and writes use the temp-then-rename pattern so NFSv4 concurrent readers never see a partial file. Propagation.replace_scores/2 now materializes the score stream once and dual-writes: Postgres on the primary path, then one ScoresFile per band as a best-effort follow-up (any file error is logged but doesn't fail the DB write, so we can verify the file path in prod before cutting readers over). Propagation.prune_old_scores/0 also clears expired score files so the existing 15-minute prune cron covers both storage layers. Dev configuration points at priv/dev_scores/, added to .gitignore. Test configuration points at a per-run tmp directory. |
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