Essential Guide

Complete guide to backup deduplication

This guide offers information on backup deduplication technology today, its strengths and weaknesses, and how it's being used.

Introduction

Backup deduplication, which reduces storage needs by eliminating redundant data, has moved from cutting-edge technology to mainstream staple. The data protection technology first showed up in 2003, aimed at organizations looking to move away from tape for the performance of disk-based backups. More than a decade later, dedupe is common in backup products, and can be a valuable instrument in data protection strategy.

But there are many elements to consider in picking the backup deduplication technology that fits best. How do zone-level and block-level deduplication compare? What are the differences between deduplication and compression? How important are deduplication ratios? What are the pros and cons of source and target deduplication?

Check out this comprehensive collection of backup deduplication content and get started learning now.

1What's up-

Backup deduplication technology today

Whether you are new to the technology or just need a refresher, these articles will get you up to speed on the backup deduplication space today.

Video

Deduplication can be powerful backup tool

Learn to use the right backup deduplication method, and how the process differs from compression. Continue Reading

Feature

Pick the right deduplication system

Learn how deduplication technology works and some factors that should play into how you decide which backup system to use. Continue Reading

Answer

How deduplication benefits, affects data backup

Deduplication can produce faster and more frequent backups, but its performance can vary. Continue Reading

Tip

A primer on backup dedupe

Backup deduplication is so common today, it is often taken for granted. However, there are a number of things to consider before choosing a dedupe approach. Continue Reading

Feature

A history of deduplication

Since debuting in 2003, data dedupe has become a mainstream technology. Continue Reading

Answer

Significant developments in backup deduplication

Deduplication accelerators are among the improvements in dedupe technology. Continue Reading

Answer

An analysis of deduplication arrays

Brien Posey discusses who is using deduplicating disk arrays today and the latest dedupe tools in this Expert Answer. Continue Reading

2Tech notes-

How deduplication is performed

There are many different ways that backup deduplication can be performed. Software vs. hardware, post-process vs. inline, target vs. source, and more. Learn about the strengths and weaknesses of each approach.

Tip

Advantages to zone-level dedupe

Zone-level deduplication may be a better fit than block-level deduplication. Continue Reading

Answer

Semantic deduplication vs. global dedupe

There are a number of products that perform global deduplication using a very similar technique to semantic dedupe. Continue Reading

Feature

Considerations for dedupe hardware selection

Choosing the right deduplication hardware option requires a comparison of expected savings, performance requirements and storage capacity consumption. Continue Reading

Answer

Comparing post-process and inline dedupe

Rachel Dines outlines post-process and inline deduplication, as well as fixed and variable-block length dedupe. Continue Reading

Answer

Backup deduplication software vs. dedupe appliances

Learn the differences between software and hardware backup deduplication in this Expert Response from Rachel Dines. Continue Reading

Feature

Hardware-based dedupe, software-based or both?

Learn the pros and cons of software- and hardware-based deduplication and how they are typically used to complement each other. Continue Reading

Answer

Source and target dedupe: Benefits and drawbacks

Take a look at target and source deduplication today, including their pros and cons. Continue Reading

Feature

Try combining source and target deduplication

Many dedupe vendors offer both source- and target-based backup. This piece compares source and target deduping and discusses how they are typically used to complement each other. Continue Reading

3Real world -

How deduplication is used today

Many organizations struggle with data growth. Deduplication, along with other techniques such as data lifecycle management, is aimed at addressing this ongoing issue. This section explores some of the ways backup deduplication is being used today -- to move data off-site, for virtual machine (VM) backups and more.

Tip

Deduplication common in virtual storage environments

Compression and deduplication are similar but different data reduction methods, and both have their place in virtual servers. Continue Reading

Tip

Deduplication in an all-flash environment

Data reduction methods such as deduplication and compression are taking the all-flash data center to the next level. Continue Reading

Feature

Survey says: Many using backup deduplication

A Storage magazine survey finds respondents implementing dedupe and evaluating cloud backup services to deal with issues in their data backup process. Continue Reading

Answer

Which applications are well suited for deduplication?

In this Expert Response, Rachel Dines outlines the types of data that yield high deduplication ratios. Continue Reading

Feature

Software-based deduplication and cloud backup

Learn about the software dedupe options available today and about the ways cloud backup is driving interest in dedupe. Continue Reading

Tip

Windows Server or backup software deduplication?

Now that deduplication has become a mainstream technology, IT pros are forced to choose between competing deduplication solutions. Continue Reading

Answer

Virtual servers can benefit from backup deduplication

In this Expert Answer, independent backup expert Brien Posey discusses using deduplication when backing up VMs. Continue Reading

Tip

Leverage data deduplication technology for DR

Data deduplication isn't just for backups anymore -- learn how data dedupe technology can be an important part of your disaster recovery (DR) strategy. Continue Reading

Tip

Deduplication can improve disaster recovery

Deduplication is an important strategy for DR. Learn more about data dedupe solutions in this expert tip by Paul Kirvan. Continue Reading

Tip

Deduplication's effect on data lifecycle management

In this tip, independent backup expert Brien Posey offers information about how data deduplication impacts data lifecycle management. Continue Reading

4Issues-

Data deduplication challenges

Dedupe has changed the way backups are performed, but as with any technology, it can't solve every problem IT pros face. These articles take a look at some deduplication challenges.

Answer

Are vendor-advertised deduplication ratios worth considering?

Be cautious when it comes to dedupe ratios as stated by vendors. Continue Reading

Answer

When to disable the deduplication process

There are two situations when it may be best to shut off backup deduplication. Continue Reading

Tip

Are target dedupe storage appliances losing their relevancy?

Marc Staimer examines why the market for target deduplication storage appliances appears to be in decline, even with the presence of EMC, Symantec and HP. Continue Reading

Tip

Backup dedupe doesn't solve all problems

John Hilliard and Marc Staimer discuss backup deduplication in this Q&A. Continue Reading

Feature

Deduplication tax among important considerations

In the ninth and final part of our deduplication series, Brien Posey discusses the so-called deduping tax and other things to consider with deduplication. Continue Reading

Tip

How to make deduplication work more efficiently

Deduplication is a key piece of the backup process, but it can bog down backup systems. Find out how dedupe accelerators help. Continue Reading

5Glossary-

A list of essential definitions

Learn some of the key terms regarding deduplication.

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