Deduplication; Introduction; Hp Storageworks Deduplication Solutions; Unique Backup Data - HP StorageWorks 12000 - Virtual Library System EVA Gateway Manual

Deduplication

Introduction

In recent years, the amount of data that companies produce has been steadily increasing. To comply
with government regulations, or simply for disaster recovery and archival purposes, companies must
retain more and more data. Consequently, the costs associated with data storage – labor, power,
cooling, floor space, transportation of physical media – have all risen. Virtual tape libraries have
become a cornerstone in modern data protection strategy due to their many benefits; chief among
these is cost. The list of virtual tape benefits also includes seamless integration into existing backup
solutions, improved SAN backup performance, and faster single file restores than those performed
with physical tape.
Deduplication, one of the most significant storage enhancements in recent years, promises to reshape
future data protection and disaster recovery solutions. This technology is ideal for virtual tape libraries.
Deduplication technology references blocks of data that have been previously stored, and only stores
new backup data that is unique. Data that is not unique is replaced with a pointer to the location of
the original data. Because there is often a great deal of duplicate data present from one backup
session to the next, disk space is consumed by similar or identical iterations of data. Deduplication
greatly improves storage efficiency by only storing an instance of data once, while still allowing
backup streams to be restored as if they had been retained in their entirety. See
Item Description
1 Data from the first backup stream is stored to disk.
2 Duplicate data (in blue) as well as unique data (in red) in a second backup stream is identified.
3 Duplicate data in the second backup stream is eliminated.
4 Unique data in the second backup stream is stored to disk.
Figure 4 Unique Backup Data
.

HP StorageWorks Deduplication Solutions

HP offers two deduplication technologies: HP Accelerated deduplication, a licensed feature available
with HP StorageWorks Virtual Library Systems (VLS), and HP Dynamic deduplication, an integrated
feature with HP StorageWorks D2D Backup System. Both HP deduplication solutions offer the following
benefits:
• Longer retention of data.
• Faster, less expensive recoveries and improved service levels.
• Fewer resources consumed, reducing operational costs.
20 Concepts
Figure 4.