Oracle Access Manager allows for distribution of identical copies of directory service data across more than one data center. These multiple data centers (referred to as multi-data centers) provide a scalable deployment model to support access management requirements for millions of users.
The Access Manager Multi-Data Center (MDC) topology scales horizontally - within a single data center by clustering multiple nodes, or across multiple data centers. This model provides for load balancing as well as failover capabilities in the case that one of the nodes or data centers goes down. This chapter contains introductory details.