Database Backups[19]

19 Database Backups

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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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Terminology •

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

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

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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. • Command-line client for advanced functions • Powerful control and scripting language • Published API that allows interface with most popular backup software • Backs up data, control, archived log, and server parameter files • Backs up files to disk or tape

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Configuring Backup Settings

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Configuring Backup Settings

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Scheduling Backups: Strategy Choose whole or partial database backup.

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Scheduling Backups: Options

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Scheduling Backups: Settings

Persistent backup configuration settings can be overridden for this backup by clicking Override Current Settings. 19-10

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Scheduling Backups: Schedule

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Scheduling Backups: Review

Click Edit RMAN Script to review RMAN commands.

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Backup Control File to Trace Control files have an additional backup option.

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

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Backup Control File To Trace Full Notes Page

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Manage Backups

Click Edit RMAN Script to review RMAN commands. 19-15

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Flash Recovery Area Monitor the Flash Recovery Area • Configure flashback logging • Size the recovery area • Monitor 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 19: Database Backups This practice covers the following: • 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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Practice Lesson 19 Full Notes Page

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