// Docs

Zarr writer

Write episode arrays and replay-buffer-style outputs to Zarr

Use write_zarr when you want array-oriented output.

pipeline.write_zarr(
    "/tmp/robot-buffer.zarr",
    arrays={
        "data/action": "action",
        "data/state": "observation.state",
    },
    episode_ends_path="meta/episode_ends",
)

For RoboticsRow inputs, Refiner can infer common robotics arrays when arrays is omitted.

Reducer

By default, write_zarr reduces shard-local stores into a single output store:

pipeline.write_zarr(
    "/tmp/output.zarr",
    reduce_to_single_store=True,
)

Disable this only when you intentionally want per-shard stores.

Related pages