High Availability and Disaster Recovery Comparison

High Availability and Disaster Recovery (sometimes also known as business continuity) address different requirements, as shown in Table 3.

Table 3. High Availability and Disaster Recovery Compared

High AvailabilityDisaster Recovery
Addresses service availability, providing redundancy so that if one infrastructure component (network, servers, processes) becomes unavailable, overall service remains available.Addresses service continuity, so that in case of disaster, service is maintained through a standby site.
A single system contains its own data (in the file system and database) and executables.Two independent environments, typically in separate and distinct facilities, each contain their own data (in the file system and database) and executables.
Data replication is unnecessary (although data should be backed up).Data and configuration information are replicated between the production and standby sites.

For information on setting up Disaster Recovery for EPM System components, see Disaster Recovery. For general information on setting up Disaster Recovery, see the Oracle Fusion Middleware Disaster Recovery Guide ( http://download.oracle.com/docs/cd/E14571_01/doc.1111/e15250/toc.htm).