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After you start one or more brokers for a database, the database is ready for simultaneous access by multiple users.

In a multi-user environment, a client can interact with a database by establishing one of these two sessions:

  • Multi-user interactive session—which enables a client to interact with the database.

  • Multi-user batch session—which processes a batch of commands (also known as a batch job) at a scheduled time. It does not involve any user interaction.

If you are using UNIX, before you can start a multi-user session, you must first configure UNIX environment variables. You will learn how to do this next.