Seagate ST39175LW Anleitung zur Fehlerbehebung PDF herunterladen (Seite 16)

Overview

2 NetBackup ServerFree Agent System Administrator’s Guide

Overview

NetBackup ServerFree Agent provides data protection services for frozen image data, and

supports offhost backup over Fibre Channel networks (in addition to conventional

backups to locally attached devices).

Frozen Image Services

A frozen image is a stable disk copy of the client’s data made prior to backup. Such a copy

is important on active file systems and Oracle databases, where updates to files or tables

can occur at any time. In such cases, making a stable, consistent copy (frozen image) is a

prerequisite to making a correct backup.

NetBackup supports two different product sets for creating frozen images: Core Frozen

Image Services, and Extended Frozen Image Services (also known as the Array

Integration option). Refer to “Frozen Image Services” on page 8 for further description of

these products, and to “Frozen Image Overview” on page 12 for background on frozen

image technology.

Offhost Backups

The other major component of NetBackup 4.5 ServerFree Agent is support for offhost

backup. Offhost backup shifts the burden of backup processing onto a separate backup

agent (NetBackup media server or third-party copy device), greatly reducing the impact

on the client’s computing resources ordinarily caused by a local backup. A backup agent

executing on a separate host reads the data from the client disk and writes it to storage.

See the following network diagram showing a backup agent.

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Seagate ST39175LW Anleitung zur Fehlerbehebung Seite 16