HP 12000 HP VLS Solutions Guide Design Guidelines for Virtual Library Systems - Page 87

Accelerated Deduplication, How it Works

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6 Accelerated Deduplication HP Accelerated deduplication technology is designed for optimal performance and scalability to meet the needs of enterprise data centers. It offers the following features and benefits: • Leverages object-level differencing code, which targets matching backup "objects." Rather than comparing the current backup with every byte of data stored on the device, Accelerated deduplication can compare backup objects from the current backup to matching objects from the previous backup, where there is likely to be duplicate data. This allows the deduplication to be performed faster, consuming fewer resources. • Is performed as a post-process. This delivers the fastest possible backup performance, because there is no loss of bandwidth to the normal backup window. • Allows data to be retained longer because redundant information is removed from previous backups, freeing disk space. • Delivers fastest restore because it maintains a complete copy of the most recent backup data. • Older data can be restored faster because it is still on the VLS - there is no need to locate physical media, load it into a drive, and perform the restore in the traditional manner. • Provides scalable deduplication performance which can be increased simply by adding nodes. However, the multi-node VLS still maintains the manageability of a single device. • Provides maximum hardware efficiency because the virtual cartridge file system was designed to be deduplication aware from the beginning, and data is not copied to a separate deduplication store. How it Works Figure 40 (page 88) illustrates the steps in the process that backup data undergoes with Accelerated deduplication. The explanations that follow correspond with the numbers in the figure. How it Works 87

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6 Accelerated Deduplication
HP Accelerated deduplication technology is designed for optimal performance and scalability to
meet the needs of enterprise data centers. It offers the following features and benefits:
•
Leverages object-level differencing code, which targets matching backup “objects.” Rather
than comparing the current backup with every byte of data stored on the device, Accelerated
deduplication can compare backup objects from the current backup to matching objects from
the previous backup, where there is likely to be duplicate data. This allows the deduplication
to be performed faster, consuming fewer resources.
•
Is performed as a post-process. This delivers the fastest possible backup performance, because
there is no loss of bandwidth to the normal backup window.
•
Allows data to be retained longer because redundant information is removed from previous
backups, freeing disk space.
•
Delivers fastest restore because it maintains a complete copy of the most recent backup data.
•
Older data can be restored faster because it is still on the VLS – there is no need to locate
physical media, load it into a drive, and perform the restore in the traditional manner.
•
Provides scalable deduplication performance which can be increased simply by adding nodes.
However, the multi-node VLS still maintains the manageability of a single device.
•
Provides maximum hardware efficiency because the virtual cartridge file system was designed
to be deduplication aware from the beginning, and data is not copied to a separate
deduplication store.
How it Works
Figure 40 (page 88)
illustrates the steps in the process that backup data undergoes with Accelerated
deduplication. The explanations that follow correspond with the numbers in the figure.
How it Works
87