Home > NetApp, Storage & Backup > #NetApp Back to Basics: Deduplication

#NetApp Back to Basics: Deduplication

May 25, 2011

What is Deduplication?
…Deduplication is an important storage efficiency tool that can be used alone or in conjunction with other storage efficiency solutions.

This month, Tech OnTap is pleased to bring you the second installment of Back to Basics, a series of articles that discuss the fundamentals of popular NetApp technologies to help you understand and get started using them.

In 2007, NetApp introduced deduplication technology that significantly decreases storage capacity requirements. NetApp deduplication improves efficiency by locating identical blocks of data and replacing them with references to a single shared block after performing a byte-level verification check. This technique reduces storage capacity requirements by eliminating redundant blocks of data that reside in the same volume or LUN.

NetApp deduplication is an integral part of the NetApp Data ONTAP® operating environment and the WAFL® file system, which manages all data on NetApp storage systems. Deduplication works “behind the scenes,” regardless of what applications you run or how you access data, and its overhead is low.

A common question is, “How much space can you save?” We’ll come back to this question in more detail later, but, in general, it depends on the dataset and the amount of duplication it contains.

Use Cases: NetApp has been measuring the benefits of deduplication in real-world environments since deduplication was introduced. The most popular use cases are VMware® and VDI, home directory data, and file services. Microsoft SharePoint® and Exchange 2010 are also rapidly gaining traction.

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Categories: NetApp, Storage & Backup
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