SAP HANA Multitenant Database Containers
It is now possible to install to SAP HANA to support multitenant database containers.
An SAP HANA system installed in multiple-container mode is capable of containing more than one multitenant database containers. Otherwise, it is a single-container system. Single-container systems can be converted to multiple-container systems.
A multiple-container system always has exactly one system database, used for central system administration, and any number of multitenant database containers (including zero), also called tenant databases. An SAP HANA system installed in multiple-container mode is identified by a single system ID (SID). Databases are identified by a SID and a database name. From the administration perspective, there is a distinction between tasks performed at system level and those performed at database level. Database clients, such as the SAP HANA studio, connect to specific databases.
All the databases in a multiple-container system share the same installation of database system software, the same computing resources, and the same system administration. However, each database is self-contained and fully isolated with its own:
- Set of database users
- Database catalog
- Traces and logs
Although database objects such as schemas, tables, views, procedures, and so on are local to the database, cross-database SELECT queries are possible. This supports cross-application reporting, for example.
If you use a multiple-container system you have one system database and any number of tenant databases. Multiple applications run in different tenant databases. This deployment option can be used to replace existing MCOS on-premise scenarios.