Performing Database Backups

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Performing Database Backups

Copyright © 2005, Oracle. All rights reserved.

Objectives After completing this lesson, you should be able to do the following: • Create consistent database backups • Back up your database without shutting it down • Create incremental backups • Automate database backups • Monitor the flash recovery area

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Backup Solutions Overview Backups can be performed by using: • Recovery Manager • Oracle Secure Backup • A user-managed scenario

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Oracle Secure Backup •

Oracle Secure Backup and RMAN provide an endto-end backup solution for Oracle environments: – Centralized backup management to tape for file system data and the Oracle database – Provides most well-integrated media management layer for RMAN backups – Backup of any data anywhere on the network

• •

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A single technical support resource for the entire backup solution expedites problem resolution. This ensures reliable data protection at lower cost and complexity.

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User-Managed Backup A user-managed scenario: • It is a manual process of tracking backup needs and status. • It requires the DBA to write scripts. • Database files must be put in the correct mode for backup. • Operating system commands are used to make backups of files.

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Terminology •

Backup strategy may include: – The entire database (whole) – A portion of the database (partial)



Backup type may be: – All information from all data files (full) – Only information that has changed since some previous backup (incremental)



Backups mode may be: – Offline (consistent, cold) – Online (inconsistent, hot)

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Terminology Backups may be stored as: • Image copies • Backup sets Data file #1

Data file #1

Data file #2

Data file #2

Data file #3

Data file #4

Data file #3

Data file #5

Data file #6

Data file #4

Backup set

Data file #5 Data file #6 Image copies

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Recovery Manager (RMAN) Enterprise Manager uses Recovery Manager (RMAN) to perform backup and recovery operations. RMAN: • Is a command-line client for advanced functions • Has powerful control and scripting language • Has a published API that enables interface with most popular backup software • Backs up data, control, archived log, and server parameter files • Backs up files to the disk or tape

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Configuring Backup Settings

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Configuring Backup Settings

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Scheduling Backups: Strategy Select whole or partial database backup.

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Scheduling Backups: Options

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Scheduling Backups: Settings

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Scheduling Backups: Schedule

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Scheduling Backups: Review

Click Edit RMAN Script to review RMAN commands. 15-15

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Back Up the Control File to a Trace File Control files have an additional backup option.

Control file trace backups may be used to recover from loss of all control files. 15-16

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Back Up the Control File to a Trace File Full Notes Page

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Managing Backups

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Flash Recovery Area Monitor the flash recovery area to: • Configure flashback logging • Size the recovery area • View current space consumption

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Summary In this lesson, you should have learned how to: • Create consistent database backups • Back up your database without shutting it down • Create incremental backups • Automate database backups • Monitor the flash recovery area

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Practice Overview: Creating Database Backups This practice covers the following topics: • Configuring your database for backups • Backing up your database while the database is open for user activity • Scheduling automatic nightly incremental backups for your database

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