Feast Cassandra / Astra DB online store plugin

A Feast plugin to use Apache Cassandra™ / Astra DB as online store.

Installation

Install the plugin alongside Feast with:

pip install feast-cassandra

Quick usage

Once the package is installed, switching online store to Cassandra / Astra DB is a matter of altering the online_store key in feature_store.yaml.

With reference to the Feast quickstart, the minimal steps are:

1. (assuming both feast and this plugin are installed)
2. creating a feature repository, feast init feature_repo;
3. cd feature_repo;
4. editing the feature_store.yaml as detailed below;
5. all subsequent steps proceed as usual.

Cassandra setup

The only required settings are hosts and type. The port number is to be provided only if different than the default (9042), and username/password only if the database requires authentication.

[...]
online_store:
    type: feast_cassandra_online_store.cassandra_online_store.CassandraOnlineStore
    hosts:
        - 192.168.1.1
        - 192.168.1.2
        - 192.168.1.3
    keyspace: KeyspaceName
    port: 9042        # optional
    username: user    # optional
    password: secret  # optional

Astra DB setup:

To point Feast to using an Astra DB instance as online store, an Astra DB token with "Database Administrator" role is required: provide the Client ID and Client Secret in the token as username and password.

The "secure connect bundle" for connecting to the database is also needed: its full path must be given in the configuration below:

[...]
online_store:
    type: feast_cassandra_online_store.cassandra_online_store.CassandraOnlineStore
    secure_bundle_path: /path/to/secure/bundle.zip
    keyspace: KeyspaceName
    username: Client_ID
    password: Client_Secret

More info

For a more detailed walkthrough, please see the Awesome Astra page on the Feast integration.

Features

The plugin leverages the architecture of Cassandra for optimal performance:

• table partitioning tailored to data access pattern;
• prepared statements.

Credits

The author of this plugin acknowledges prior exploratory work by hamzakpt and Brian Mortimore, on which this implementation is loosely based.