The figure shows the topology for site-to-site disaster recovery for Oracle Application Server. This solution has a production site and a standby site and involves several middle tier nodes and an OracleAS Infrastructure host in each site. The OracleAS Infrastructure can also be deployed in an OracleAS Cold Failover Cluster solution. The sites are identical both in installation and configuration of the nodes: operating system, patches, and installed software. The instructions for the processes involved in the recovery are provided in the text.