This part of the book describes the built-in distributed database packages:

• Chapter 14, Snapshots, explores the packages, DBMS_SNAPSHOT, DBMS_REFRESH, and DBMS_OFFLINE_SNAPSHOT, and some programs in DBMS_REPCAT that show how to maintain snapshots, snapshot groups, and snapshot logs.

• Chapter 15, Advanced Replication, explains how to use DBMS_REPCAT, DBMS_REPUTIL, DBMS_OFFLINE_OG, DBMS_REPCAT_ADMIN, DBMS_REPCAT_AUTH, and DBMS_RECTIFIER_DIFF to create and to administer your replicated databases.

• Chapter 16, Conflict Resolution, shows you how to configure Oracle to automatically detect, correct, and report many forseeable conflicts by using procedures in DBMS_REPCAT to create and maintain custom resolution methods.

• Chapter 17, Deferred Transactions and Remote Procedure Calls, introduces the DBMS_DEFER package and shows you how to queue deferred remote procedure calls (RPCs) and use DBMS_DEFER_QUERY and DBMS_DEFER_SYS to perform administrative and diagnostic activities.