SQLite

The SQLite online store provides support for materializing feature values into an SQLite database for serving online features.

All feature values are stored in an on-disk SQLite database
Only the latest feature values are persisted

project: my_feature_repo
registry: data/registry.db
provider: local
online_store:
  type: sqlite
  path: data/online_store.db

The full set of configuration options is available in SqliteOnlineStoreConfig.

The set of functionality supported by online stores is described in detail here. Below is a matrix indicating which functionality is supported by the Sqlite online store.

write feature values to the online store

read feature values from the online store

update infrastructure (e.g. tables) in the online store

teardown infrastructure (e.g. tables) in the online store

generate a plan of infrastructure changes

support for on-demand transforms

support for entityless feature views

support for concurrent writing to the same key

support for ttl (time to live) at retrieval

support for deleting expired data

collocated by feature view

collocated by feature service

To compare this set of functionality against other online stores, please see the full functionality matrix.