Hazelcast online store is in alpha development.
The Hazelcast online store provides support for materializing feature values into a Hazelcast cluster for serving online features in real-time. In order to use Hazelcast as online store, you need to have a running Hazelcast cluster. You can create a cluster using Hazelcast Viridian Serverless. See this getting started page for more details.
Each feature view is mapped one-to-one to a specific Hazelcast IMap
This implementation inherits all strengths of Hazelcast such as high availability, fault-tolerance, and data distribution.
Secure TSL/SSL connection is supported by Hazelcast online store.
You can set TTL (Time-To-Live) setting for your features in Hazelcast cluster.
Each feature view corresponds to an IMap in Hazelcast cluster and the entries in that IMap corresponds to features of entities. Each feature value stored separately and can be retrieved individually.
In order to use Hazelcast online store, you'll need to run pip install 'feast[hazelcast]'. You can then get started with the command feast init REPO_NAME -t hazelcast.
```yaml project: my_feature_repo registry: data/registry.db provider: local online_store: type: hazelcast cluster_name: dev cluster_members: ["localhost:5701"] key_ttl_seconds: 36000 ```
To compare this set of functionality against other online stores, please see the full functionality matrix.
| Hazelcast | |
|---|---|
write feature values to the online store
yes
read feature values from the online store
yes
update infrastructure (e.g. tables) in the online store
yes
teardown infrastructure (e.g. tables) in the online store
yes
generate a plan of infrastructure changes
no
support for on-demand transforms
yes
readable by Python SDK
yes
readable by Java
no
readable by Go
no
support for entityless feature views
yes
support for concurrent writing to the same key
yes
support for ttl (time to live) at retrieval
yes
support for deleting expired data
yes
collocated by feature view
no
collocated by feature service
no
collocated by entity key
yes