Dell Avamar for Oracle 19.10 User Guide

Backup types

The Avamar Plug-in for Oracle supports the following types of backups:

• Backups of Oracle database files and archive logs.
• Cold (offline) backups of the Oracle file system.
• Four backup levels:
  • Full—Backs up all data files. You can optionally choose to backup the archive logs during a Level 0 (incremental) backup or at a later time.

    Level full, the default backup level, is not part of the incremental backup strate

    gy.
  • Level 0 (incremental)—Backs up all data files.

    You must run a Level 0 backup before you run a Level 1 backup.

  • Differential (incremental)—Backs up all database blocks that have changed since the most recent incremental (differential or cumulative) or level 0 backup. The following figure shows daily level 1 differential backups during a two-week period.

    

  • Cumulative (incremental)—Backs up all database blocks that have changed since the most recent level 0 backup.

    Restoring a backup from a cumulative backup is faster than restoring a backup from a differential backup. Cumulative backups, however, require more disk space and take longer to complete than differential backups.
    

    Perform cumulative level backups when recovery time is more important than disk space. The following figure shows daily level 1 cumulative backups during a two-week period.

    

• On-demand or scheduled backups—You can perform on-demand backups or schedule backups to run automatically.