1 Chapter 1. IBM DB2 Recovery Expert for z/OS architecture In this chapter, we describe the main features of IBM DB2 Recovery Expert for z/OS, its architecture, the recoverable objects, types of recovery, recovery semantics, and processing flow. We also describe some of the key considerations in choosing a particular topology to address a business requirement. The topics covered are: Main features Architecture Recovery objects, recovery types, and recovery semantics Processing flow © Copyright IBM Corp. 2006. All rights reserved. 1