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Executive summary ............................................................................................................................... 2

Solution description .............................................................................................................................. 2

What is data deduplication? ................................................................................................................. 3

The benefits of data deduplication ......................................................................................................... 4

Details to know about object-level differencing ........................................................................................ 4

How much space does data deduplication really save? ............................................................................ 4

Example: 500 GB file server backup .................................................................................................. 4

Deduplication portfolio strategy from HP ................................................................................................. 6

Where does HP Data Protector software fit into the picture? ...................................................................... 7

HP Data Protector Advanced Backup to Disk Licensing ......................................................................... 7

Verify capacity for VTL ......................................................................................................................... 8

Licensing example ............................................................................................................................... 8

VTL configuration ............................................................................................................................. 8

For more information .......................................................................................................................... 10

Integrating HP Data Protector software with

HP Data Deduplication Solutions

An analysis of how to implement data deduplication technologies

utilizing HP Data Protector software

Summary of content (10 pages)

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Integrating HP Data Protector software with HP Data Deduplication Solutions An analysis of how to implement data deduplication technologies utilizing HP Data Protector software Executive summary............................................................................................................................... 2 Solution description.............................................................................................................................. 2 What is data deduplication? ..........
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Executive summary This white paper provides complementary information on data deduplication technologies supported by the latest Storage Solutions from HP. Data deduplication is a hot topic in data protection and therefore, also a relevant topic for HP Data Protector software. Solution description HP Data Protector software is a backup and disaster recovery product that provides reliable data protection and high availability for your expanding mission critical data.
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What is data deduplication? Data deduplication is the ability of an appliance or software to compare blocks of data being written to the backup device with data blocks previously stored on the device. If duplicate data is found, a pointer is established to the original data, rather than storing the duplicate data sets. This removes, or “deduplicates,” the redundant data blocks. Data deduplication is done at the block or chunk level, not at the file level. This greatly reduces the volume of data stored.
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The benefits of data deduplication There are a number of benefits realized by using data deduplication technology. The most compelling one is the increase of effective capacity for storing backup data. This allows for longer retention periods for backup data on disk, resulting in faster data recovery and higher service level agreements. HP disk-based backup systems with built-in data deduplication also reduce space and power requirements for the increased volume of protected data.
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Figure 2: Disk Space requirements Data stored with Data stored normally 1st daily full backup 1st daily incremental backup 2nd daily incremental backup 3rd daily incremental backup 4th daily incremental backup 5th daily incremental backup 2nd weekly full backup 3rd weekly full backup 25th weekly full backup Total deduplication 500 GB 50 GB 50 GB 50 GB 50 GB 50 GB 500 GB 500 GB 500 GB 500 GB 5 GB 5 GB 5 GB 5 GB 5 GB 25 GB 25 GB 25 GB 12,750 GB 1,125 GB This example uses a system containing 500 GB of b
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Figure 3: Deduplication Ratio Backup policy Daily change rate Daily full and weekly full 4 months* 0.50% 1.00% 2.00% 6 months 31:1 24:1 16:1 * 4 months = 5 daily + 1 year Daily incremental and weekly full 4 months* 6 months 37:1 50:1 25:1 27:1 32:1 19:1 17:1 18:1 13:1 17 weekly backups Ratio = data sent vs.
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Figure 4: HP StorageWorks Disk-based Backup Where does HP Data Protector software fit into the picture? Deduplication, today, is a feature provided by HP StorageWorks Virtual Library Systems and HP StorageWorks D2D Backup Systems and other vendors’ hardware. Deduplication on the in the previously mentioned paragraph storage devices happens either as “Inline deduplication” (Dynamic deduplication) or as “Post-Process” (Accelerated deduplication) technique.
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Note: Accelerated deduplication capacity licenses are available for current VLS models (VLS62xx, VLS66xx, VLS9000, VLS12000). These licenses are not part of the HP Data Protector licensing schema. Verify capacity for VTL The recommended tool to verify consumed or allocated disk space on virtual tape libraries is the web-based Command View VLS management interface.
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Figure 6: VLS Licensing Example Usable native capacity of a virtual tape library (VTL) is the size on disk of the virtual tape library consumed by all protected HP Data Protector backups as reported by the VTL. A total of five B7038AA Advanced Backup to Disk licenses are required to allow HP Data Protector software to utilize all 5TB in the example depicted in Figure 6. Note Virtual Tape Libraries can be upgraded using capacity-kits to extend the VTL’s usable native capacity.
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For more information HP StorageWorks D2D Backup Systems (D2D): (http://www.hp.com/go/d2d). HP StorageWorks Virtual Library Systems (VLS): (http://www.hp.com/go/vls). Data Protection Solutions with Deduplication: (http://www.hp.com/go/deduplication) Technology for better business outcomes © 2008 Hewlett-Packard Development Company, L.P. The information contained herein is subject to change without notice.