Distributed PostgreSQL comes to Azure Cosmos DB. PostgreSQL is a open source object-relational database system with over 35 years of active development. PostgreSQL is used as the primary data store or data warehouse for many web, mobile, geospatial, and analytics applications.
Azure Cosmos DB for PostgreSQL is the first managed database that brings together a combination of the following three key features. The first is True PostgreSQL, with the full familiarity and benefits of PostgreSQL, for development environment. Second is Cloud database benefits from a broad range of managed database features so that users don’t have to worry about your database again.
For example, with Cloud database you can create high availability configurations across availability zones, to restore your cluster to a particular point in time, or one-click upgrade within the PostgreSQL database extensions. The third is to be able to start small, and then scale globally with Citus.
Please note, Citus database is an open source extension for Postgres that gives users all the greatness of Postgres, at any scale, from a single node to a large distributed database cluster. Link below to a blog from Microsoft, written by Ozgun Erdogan, a Partner Software Engineering Manager and Umur Cubukev, who is the Head of PostgreSQL Product at Azure, talking about Somme of the the benefits of PostgreSQL comes to Azure Cosmos DB, and what it means for developers working in a cloud environment.