Introduction
Implementing nTier Deduplication
8
Advanced VTL Configuration
In the Advanced VTL Configuration, the backup software manages backups to the
virtual tape library while the VTL appliance controls the export of data from virtual
tapes to physical tapes.
VTL dramatically accelerates backups by
acting as a
de facto
cache to your
physical tape library and enables data to
be moved to physical tapes as a
background process without impacting
production servers. This innovative
approach to backup addresses the
limitations of conventional tape backup.
Moreover, since VTL manages the export
of data from virtual to physical tapes,
there is no additional overhead for the
backup server.
With the Advanced VTL Configuration,
backups to virtual tapes occur very
quickly. Then, at a later time, when you
are done using a given tape, you can
export data to physical tape for offsite
vaulting or disaster recovery without
impacting the production environment.
VTL can also be set up in Auto Archive
mode so that after each backup to virtual
tape completes, data is automatically
exported to physical tape.
The Advanced VTL Configuration
requires you to set up the initial physical
tape library emulation from within the VTL Console so that there is a 1:1 mapping,
with identical barcodes, between virtual and physical tapes. This enables the
backup software to keep track of backup tapes and prevents tapes from being
created that would be unidentifiable by the backup software.
Whenever data is written to physical tape, the virtual tape can then be deleted or the
copy can be left on the virtual tape for rapid recovery. The physical tape will always
have the same barcode as its virtual tape counterpart. This gives you the flexibility to
easily restore from either virtual or physical tape.
When it comes time to restore, the backup software identifies the barcode of the
tape containing the needed data. If the data still resides on virtual tape (it was never
exported or it was exported with the virtual tape left intact), it can be restored very
quickly because it is being read from disk. If the data is only on physical tape, the
tape must first be re-imported into VTL with a few simple keystrokes in the VTL
Console so that the backup software can access it and restore in its usual manner.
nTier VTL with
FalconStor
software
Backup to
virtual tape
Advanced Configuration
Backup to
physical
tape using
VTL Export
Backup server
Spectra tape
library
Содержание Spectra nTier500
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