Citus Unforks From PostgreSQL, Goes Open Source
First, Citus 5.0 now fully uses the PostgreSQL extension APIs. In other words, Citus becomes the first distributed database in the world that doesn’t fork the underlying database. This means Citus users can immediately benefit from new features in PostgreSQL, such as semi-structured data types (json, jsonb), UPSERT, or when 9.6 arrives no more full table vacuums. Also, users can keep working with their existing Postgres drivers and tools.
.. Second, Citus is going open source! The project, codebase, and all open issues are now available on Github