Planning for HDR

Before you start setting up computers and database servers to use HDR, you might want to do some initial planning. The following list contains planning tasks to perform:

• Choose and acquire appropriate hardware.
• If you are using more than one database server to store data that you want to replicate, migrate and redistribute this data so that it can be managed by a single database server.
• Ensure that all databases you want to replicate use transaction logging. To turn on transaction logging, see Managing the Database-Logging Mode.
• Develop client applications to make use of both database servers in the replication pair. For a discussion of design considerations, refer to Redirection and Connectivity for Data-Replication Clients and Designing Clients to Use the Secondary Database Server.
• Create a schedule for starting HDR for the first time.
• Design a storage-space and logical-log backup schedule for the primary database server.
• Produce a plan for how to handle failures of either database server and how to restart HDR after a failure. Read Redirection and Connectivity for Data-Replication Clients.