Basic Concepts and Terminology


  • FE: Frontend - compute engine
  • Blackhole - storeage engine


In Hologres, an instance is a cluster that contains multiple databases.


Hologres is fully compatible with Postgres. A database in Hologres is a set of schemas, which is the same with Postgres’s definition.

All the operations on tabels, functions, etc are inside a database.


Table is the unit of data storage.