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windmill/docs
hugocasaandClaude Opus 5 884e3dc5b6 refactor: keep eval datasets in Postgres instead of object storage
Datasets, cases and experiments become rows (`eval_dataset`, `eval_case`,
`eval_experiment`, `eval_experiment_case`) rather than objects under a
`wmill_eval_datasets/` prefix. What a run produced is still the job's:
only case inputs and an experiment's case snapshot are stored.

This removes the machinery the object store needed:

- The advisory lock and the read-modify-write of a per-dataset JSONL. A
  case is a row, so there is nothing to serialize.
- The launch-time identity check on the dataset. The foreign key makes a
  concurrent delete fail the transaction instead.
- The trust guard on an experiment's job ids, which existed because a
  script can write workspace object storage directly and could forge an
  experiment naming somebody else's job.

An experiment now chooses every job id and records itself before pushing
anything, so a launch that dies partway leaves a recorded case whose job
is missing rather than a running job nothing accounts for; cases that
never reached the queue are removed again.

Row-level security on `eval_dataset` is the authority on who may read or
write a dataset, so `extra_perms` grants work and the rule is not
mirrored in Rust. Cases and experiments carry a read policy derived from
their dataset and no write policy: they are written on the unrestricted
pool after the dataset row itself has been asked, with
`SELECT ... FOR UPDATE`, whether the caller may write it.

Cases are capped at 256 KiB each and 10 000 per dataset, refused rather
than truncated. Attachments are S3 references, not inline bytes, so a
case that approaches either cap is a mistake rather than a use case.

Evals no longer need the `parquet` feature or a configured workspace
object storage.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-08-12 14:22:39 +02:00
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