HP 1000s Guide de démarrage rapide télécharger pdf (Page 24)

24 NAS 1000s Quick Start Guide

Persistent Storage Management Elements

Persistent Storage Manager lets the administrator make replicas

of disks, called snapshots. Snapshots enable the creation of

multipurpose logical replicas of production data without having

to physically copy the data. They can be used to immediately

recover a lost file or directory, to test a new application with

realistic data without affecting the “real” data, and to serve as a

source of data for backups. Snapshots are a temporary backup of

the data and are not meant to be permanent.

Snapshots use existing space from the volume, partition, or

logical drive to maintain the data required to present the original

data. This space is termed the cache file. By default the cache

files consumes 10 percent of the available space of a logical

storage element. Snapshots can be read only, read-write or always

keep, and if they are shared, users can access a snapshot and edit

the data. If snapshots are shared with write access enabled, a

second snapshot of the original volume should be created. There

is no backup of the original snapshot unless a second snapshot of

the volume is taken.

Snapshot Facts

■ Snapshots are created on a per volume, partition, or logical

drive basis.

■ Snapshots can be read-only, read-write or always keep.

■ Snapshots are mounted as a mount point on the root of the

volume, partition or logical drive.

■ Snapshots can be shared in the same manner as any other

folder, drive or mount point.

■ Snapshots are meant to be temporary in nature.

■ Snapshots are automatically deleted if disk space becomes

critical and they are not set to always keep.

■ Persistent Storage Manager only writes to the cache file on

the first change of the underlying data.

Full documentation of Persistent Storage Manager may be found

in the administration guide.

1 2 ... 19 20 21 22 23 24 25 26 27 28 29 ... 55 56

Pas de commentaire

HP 1000s Guide de démarrage rapide Page 24