Seagate ST39175LW Betriebsanweisung PDF herunterladen (Seite 13)

Chapter 1, Introduction 3

Terminology

This section introduces terms used with NetBackup 4.0V ServerFree Agent.

Backup agent (also see Third-Party Copy Device)

A general term for the host that manages the backup on behalf of the NetBackup client. In

NetBackup 4.0V, this is either the NetBackup media server or a third-party copy device.

Bridge

In a SAN network, a bridge connects SCSI devices to Fibre Channel. A third-party copy

device can be implemented as part of a bridge or as part of other devices. Note that not all

bridges function as third-party copy devices.

Copy manager (see Third-Party Copy Device)

Data movement

A copy operation as performed by a third-party copy device or NetBackup media server.

Extent

A contiguous set of disk blocks allocated for a file and represented by two values: starting

block address (offset in the device) and length (number of contiguous blocks). The

mapping methods in ServerFree Agent determine the list of extents and send the list to the

backup agent.

Fibre channel

A type of high-speed network composed of either optical or copper cable and employing

the Fibre Channel protocol. NetBackup 4.0V ServerFree Agent supports both arbitrated

loop and switched fabric (switched fibre channel) environments.

File list

The list of files to be backed up for a NetBackup class. For ServerFree Agent, the files in a

file list must be part of a file system that was designated as a frozen image source.

File system

Has two different meanings.

◆ When referring to a product, such as the ufs (Sun Solaris) or VxFS (VERITAS) file

system, it refers to the management and allocation schemes on which the entire file

tree is structured.

◆ When referring to a particular component in a file tree, file system means a directory

(with any subdirectories and files) that is attached to the UNIX file tree by means of

the mount command. When a file system is selected as either a frozen image source or

as an entry in the NetBackup file list, this definition applies.

NetBackup 4.0V ServerFree Agent System Administrator's Guide for Solaris

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Seagate ST39175LW Betriebsanweisung Seite 13