Update README

registry/README.md

@@ -1,5 +1,17 @@
 # Feathr Registry
 
-This is a SQL based [Feathr](https://github.com/linkedin/feathr) registry implementation.
+This is a enhanced SQL database based [Feathr](https://github.com/linkedin/feathr) registry implementation.
 
-The API spec is slightly different so currently it cannot be used with Feathr client yet.
+The registry has compatible API as [the one in the main Feathr repo](https://github.com/linkedin/feathr/tree/main/registry), also it supports **clustering** and more SQL databases:
+
+* Microsoft SQL Server (including AzureSQL and Azure SQL Data Warehouse)
+* MySQL
+* PostgreSQL
+* SQLite (for testing purpose)
+
+To run the registry service, use:
+```
+feathr-registry --http-addr 0.0.0.0:8000
+```
+
+Check out for more command line options with `feathr-registry --help`, detailed documents are coming soon.