RPI supports clients running in one of the following modes:
• SQL data warehouse with any auxiliary databases: in this mode, a SQL data warehouse can be accompanied by any combination of SQL and/or NoSQL auxiliary databases.
• NoSQL databases only: a NoSQL data warehouse can be optionally accompanied by one or more NoSQL auxiliary databases.
• NoSQL data warehouse with SQL auxiliary databases: a NoSQL data warehouse can be optionally accompanied by one or more SQL or NoSQL auxiliary databases.