Document VStream

And the new vstream copy resume work added in:
  vitessio/vitess#11103

Signed-off-by: Matt Lord <[email protected]>

content/en/docs/16.0/reference/vreplication/vstream.md

@@ -0,0 +1,40 @@
+---
+title: VStream
+description: Change event streams
+weight: 75
+---
+
+Vitess Gateways (`vtgate`) provide a `VStream` API that allows clients to subscribe
+to a change event stream for a set of tables.
+
+## Use Cases
+
+ * **Change Data Capture (CDC)**: `VStream` can be used to capture changes to a
+   table and send them to a downstream system. This is useful for building
+   real-time data pipelines.
+
+## Overview
+
+`VStream` supports copying the current contents of a table — as you will often not
+have the binary logs going back to the creation of the table — and then begin streaming
+new changes to the table from that point on. It also supports resuming this initial copy
+phase if it's interrupted for any reason.
+
+Events in the stream are [MySQL row based binary log events](https://dev.mysql.com/doc/refman/en/mysqlbinlog-row-events.html)
+and can be processed by event bridges which support Vitess such as
+[Debezium](https://debezium.io/documentation/reference/stable/connectors/vitess.html)
+and to some extent bridges that support MySQL such as
+[GoldenGate](https://docs.oracle.com/en/middleware/goldengate/core/21.3/gghdb/using-oracle-goldengate-mysql.html).
+Other products such as [AirByte](https://airbyte.com) can also be used with [custom
+Vitess connectors](https://docs.airbyte.com/connector-development/).
+
+{{< warning >}}
+We recommend Debezium as it has native Vitess support and has been used in production
+environments by many Vitess users.
+{{< /warning >}}
+
+## API Details
+
+## Notes
+
+### More Reading