This figure shows two environments: Exadata Hardware and ZFS Hardware. In the Exadata Hardware environment, there are two systems: Production and Standby. Data flows from the Production to Standby. In the ZFS Hardware environment, there are four systems: a Test Master and three test databases, John, Jane, and Jim. Data flows from the Standby system in the Exadata Hardware environment to the Test Master, and from the Test Master to the three test databases.