QNAP Disk On-line Server NAS-2100 Manual de usuario descargar pdf (Pagina 18)

Combine backups with snapshots

You can combine your backups with snapshots. In brief, a snapshot is an image of your data

frozen in time. However, because the image isn’t the actual data but rather pointers to the it,

snapshots are virtually instantaneous while remaining transparent to the user.

You can schedule a snapshot of any volume at a specified frequency and time interval. Why

would you want to do that? Well, imagine that a LAN workstation becomes infected with a virus

one morning, and that the virus spreads to the files on a ReadyNAS share. If you had scheduled a

daily snapshot at midnight, you could go back to the snapshot of the share and restore the version

of the files as of midnight.

After you take a snapshot, you can schedule a backup of it. Rather than backing up live shares

from the ReadyNAS while file contents are potentially changing, you can backup the snapshot

instead, i.e. your data frozen in time. If you coordinate your backup job to start shortly after your

snapshot is taken, even if the backup process is still running into the day, you won't have to

worry about backing up potentially inconsistent and outdated data.

To schedule a snapshot:

1. In the Snapshot Space section of the Volume tab shown in Figure O, specify the

percentage of the volume you want to reserve for snapshots.

Figure O: The snapshot Schedule section is available only after you reserve snapshot

space.

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QNAP Disk On-line Server NAS-2100 Manual de usuario Pagina 18