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Oracle in a Nutshell
book

Oracle in a Nutshell

by Rick Greenwald, David C. Kreines
December 2002
Intermediate to advanced content levelIntermediate to advanced
928 pages
85h 29m
English
O'Reilly Media, Inc.
Content preview from Oracle in a Nutshell

RMAN Fundamentals

You need to be familiar with a few RMAN concepts as you read the following sections:

Server processes

RMAN uses a number of server processes to operate. These server processes are started whenever you start RMAN or use one of its features—for example, when you connect to a catalog or allocate a channel for backup.

Channel

A channel is an RMAN server process that communicates with a particular backup device. You must allocate a channel before you can begin any backup operations.

Target and catalog

RMAN can interact with two different Oracle databases. The target database is the database for which you are performing backup or recovery operations. The catalog is a database that acts as a repository for information about RMAN activities. The catalog is normally another Oracle database on a different Oracle host; using a different host prevents a failure from destroying the very catalog information that will be needed to recover from that failure.

The catalog includes a specific schema that will hold the relevant information. To create a catalog for RMAN, you first connect to the catalog database with RMAN and issue the CREATE CATALOG command. If you want to use a catalog for RMAN, you will have to register any target databases using RMAN’s REGISTER command before those databases will be able to use the catalog.

You don’t have to use a catalog, because RMAN includes information about any backup in the target database’s control files. However, the catalog gives you more ...

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Publisher Resources

ISBN: 0596003366Errata Page