docs/reference/offline-stores/dask.md
The Dask offline store provides support for reading FileSources.
{% hint style="warning" %} All data is downloaded and joined using Python and therefore may not scale to production workloads. {% endhint %}
{% code title="feature_store.yaml" %}
project: my_feature_repo
registry: data/registry.db
provider: local
offline_store:
type: dask
{% endcode %}
The full set of configuration options is available in DaskOfflineStoreConfig.
The set of functionality supported by offline stores is described in detail here. Below is a matrix indicating which functionality is supported by the dask offline store.
| Dask | |
|---|---|
get_historical_features (point-in-time correct join) | yes |
pull_latest_from_table_or_query (retrieve latest feature values) | yes |
pull_all_from_table_or_query (retrieve a saved dataset) | yes |
offline_write_batch (persist dataframes to offline store) | yes |
write_logged_features (persist logged features to offline store) | yes |
Below is a matrix indicating which functionality is supported by DaskRetrievalJob.
| Dask | |
|---|---|
| export to dataframe | yes |
| export to arrow table | yes |
| export to arrow batches | no |
| export to SQL | no |
| export to data lake (S3, GCS, etc.) | no |
| export to data warehouse | no |
| export as Spark dataframe | no |
| local execution of Python-based on-demand transforms | yes |
| remote execution of Python-based on-demand transforms | no |
| persist results in the offline store | yes |
| preview the query plan before execution | yes |
| read partitioned data | yes |
To compare this set of functionality against other offline stores, please see the full functionality matrix.