# Using Kinesis streams to receive system messages for Amazon Chime SDK meetings
<a name="elastic-onboard-streams"></a>

You can configure an `AppInstance` to receive data in the form of a stream. For example, a stream can include messages, sub-channel events, and channel events.

As part of that, we support the `CREATE_SUB_CHANNEL` and `DELETE_SUB_CHANNEL` events. They indicate when a sub-channel was created or deleted as part of membership balancing. For more information about receiving data streams, refer to [Streaming messaging data in Amazon Chime SDK messaging](streaming-export.md).