Special Report

Data deduplication for backup and storage environments

It's no secret that data deduplication is one of the hottest technologies in data backup and recovery environments. And now the technology is getting attention in the primary storage space, with vendors trotting out a steady stream of new dedupe products.

To help UK storage pros stay on top of the latest dedupe developments, we've compiled our most popular tips, news and analysis on the topic. Learn how your peers are using this technology and what our experts have to say about the pros and cons associated with it.


SearchStorage.co.UK data deduplication resources

How does data deduplication impact backup?
Data deduplication impacts backups in different ways depending on whether the technology is deployed at the client side or the back-end disk target. According to Simon Johnson of GlassHouse Technologies, both of these options have positive impacts on backup as they result in less data residing in backup storage. In turn, both dedupe options will allow for backup targets to occupy less space and use less energy for power and cooling.

Is data deduplication a good way to cut backup times from remote offices?
Dedupe can help you cut backup times in remote locations, but depending on how much data there is and the vendor involved, this can be prohibitively expensive. According to CMC Market's Greg Gawthorpe, another method to consider is real-time replication, which can be done on deduplicated data to reduce bandwidth but can equally be done with tools which will only replicate block-level changes.

A comparison of data deduplication products
There are a large number of dedupe products on the market, with many key differences. Antony Adshead, our UK bureau chief, examines what you should consider during the procurement stage, including whether to choose a hardware or software data dedupe product, whether dedupe should be part of a virtual tape library (VTL) or network-attached storage (NAS) system, how to determine whether inline or post-process features are best for your environment and more.

Is data deduplication right for your primary storage infrastructure?
Data deduplication is a firmly established technique for reducing storage demands on data backup, but a handful of vendors are now applying this technology to primary storage. However, the demands on primary storage are considerably different than those on data backup, so if you're undertaking a primary deduplication project, you'll need to learn about the different requirements and techniques.

Why global deduplication is important in choosing a dedupe product
Before you implement a data dedupe product, you should consider whether it provides global deduplication. Some vendors claim global deduplication does not matter. These are the vendors that currently do not have global deduplication or are seriously scalability limited. This tip examines why deduping data from multiple deduped sites can significantly benefit backup environments.

This was first published in October 2009

 

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