1. Administrator's Guide
  2. Introduction to Recovery Appliance
  3. Oracle's Recovery Appliance Solution
  4. Minimal Backup Overhead

Minimal Backup Overhead

In traditional database backup techniques, the Oracle database host performs the brunt of the processing. Agents for disk backup, tape backup, and deduplication may all be running on the host. Furthermore, all backup operations—compression, validation, deletion, merging, and so on—occur on the database host. This overhead can greatly degrade database performance.

Recovery Appliance removes almost the entire load from the protected databases. The only backup operations required on the hosts, which could be primary database or standby database hosts, are sending incremental backups to the Recovery Appliance. The incremental-forever strategy reduces the backup window on the database hosts significantly. Recovery Appliance handles backup processing, tape operations, data integrity checks, and routine maintenance.

Note:

Recovery Appliance only supports backups of Oracle databases, not file system data or non-Oracle databases.

Recovery Appliance optimizes management of database changes using delta push and delta store, shown in Figure 1-9. The net result of delta push and delta store is that the problem of lengthening backup windows is eliminated. The DBA performs only fast incremental backups, and lets the Recovery Appliance manage the backup blocks.

Figure 1-9 Delta Push and Delta Store

Description of Figure 1-9 follows
Description of "Figure 1-9 Delta Push and Delta Store"

See Also:

"Traditional Database Backup Techniques"