Merge pull request feast-dev#15 from redhatHameed/doc-change

update the document change and fix teardown function

Author: redhatHameed

docs/SUMMARY.md

@@ -85,6 +85,7 @@
   * [PostgreSQL (contrib)](reference/offline-stores/postgres.md)
   * [Trino (contrib)](reference/offline-stores/trino.md)
   * [Azure Synapse + Azure SQL (contrib)](reference/offline-stores/mssql.md)
+  * [Remote Offline](reference/offline-stores/remote-offline-store.md)
 * [Online stores](reference/online-stores/README.md)
   * [Overview](reference/online-stores/overview.md)
   * [SQLite](reference/online-stores/sqlite.md)
@@ -117,7 +118,7 @@
   * [Python feature server](reference/feature-servers/python-feature-server.md)
   * [\[Alpha\] Go feature server](reference/feature-servers/go-feature-server.md)
   * [\[Alpha\] AWS Lambda feature server](reference/feature-servers/alpha-aws-lambda-feature-server.md)
-  * [Remote Offline Store ](reference/feature-servers/remote-offline-store.md)
+  * [Offline Feature Server](reference/feature-servers/offline-feature-server)
 
 * [\[Beta\] Web UI](reference/alpha-web-ui.md)
 * [\[Alpha\] On demand feature view](reference/alpha-on-demand-feature-view.md)

docs/reference/feature-servers/README.md

@@ -12,4 +12,8 @@ Feast users can choose to retrieve features from a feature server, as opposed to
 
 {% content-ref url="alpha-aws-lambda-feature-server.md" %}
 [alpha-aws-lambda-feature-server.md](alpha-aws-lambda-feature-server.md)
+{% endcontent-ref %}
+
+{% content-ref url="offline-feature-server.md" %}
+[offline-feature-server.md](offline-feature-server.md)
 {% endcontent-ref %}

docs/reference/feature-servers/offline-feature-server.md

@@ -0,0 +1,35 @@
+# Offline feature server
+
+## Description
+
+The Offline feature server is an Apache Arrow Flight Server that uses the gRPC communication protocol to exchange data.
+This server wraps calls to existing offline store implementations and exposes interfaces as Arrow Flight endpoints.
+
+## How to configure the server
+
+## CLI
+
+There is a CLI command that starts the Offline feature server: `feast serve_offline`. By default, remote offline server uses port 8815, the port can be overridden with a `--port` flag.
+
+## Deploying as a service on Kubernetes
+
+The Offline feature server can be deployed using helm chart see this [helm chart](https://github.com/feast-dev/feast/blob/master/infra/charts/feast-feature-server).
+
+User need to set `feast_mode=offline`, when installing Offline feature server as shown in the helm command below:
+
+```
+helm install feast-offline-server feast-charts/feast-feature-server --set feast_mode=offline  --set feature_store_yaml_base64=$(base64 > feature_store.yaml)
+```
+
+## Server Example
+
+The complete example can be find under [remote-offline-store-example](../../../examples/remote-offline-store)
+
+## How to configure the client
+
+Please see the detail how to configure offline store client [remote-offline-store.md](../offline-stores/remote-offline-store.md)
+
+## Functionality Matrix
+
+The set of functionalities supported by remote offline stores is the same as those supported by offline stores with the SDK, which are described in detail [here](../offline-stores/overview.md#functionality).
+

docs/reference/feature-servers/remote-offline-store.md

@@ -0,0 +1,28 @@
+# Remote Offline Store
+
+## Description
+
+The Remote Offline Store is an Arrow Flight client for the offline store that implements the `RemoteOfflineStore` class using the existing `OfflineStore` interface.
+The client implements various methods, including `get_historical_features`, `pull_latest_from_table_or_query`, `write_logged_features`, and `offline_write_batch`.
+
+## How to configure the client
+
+User needs to create client side `feature_store.yaml` file and set the `offline_store` type `remote` and provide the server connection configuration 
+including adding the host and specifying the port (default is 8815) required by the Arrow Flight client to connect with the Arrow Flight server.
+
+{% code title="feature_store.yaml" %}
+```yaml
+offline_store:
+  type: remote
+  host: localhost
+  port: 8815
+```
+{% endcode %}
+
+## Client Example
+
+The complete example can be find under [remote-offline-store-example](../../../examples/remote-offline-store)
+
+## How to configure the server
+
+Please see the detail how to configure offline feature server [offline-feature-server.md](../feature-servers/offline-feature-server.md)

docs/reference/offline-stores/remote-offline-store.md

@@ -416,7 +416,7 @@ def create_offline_store_config(self) -> FeastConfigBaseModel:
 
     def teardown(self):
         super().teardown()
-        if self.proc is None and self.proc.is_alive():
+        if self.proc is not None:
             self.proc.kill()
 
             # wait server to free the port