Tag Archives: dedupe

Deduplication Strategy and Dell/Ocarina

This week, Dell acquired Ocarina, a provider of primary storage deduplication.  The acquisition provides technology that they can integrate with existing storage platforms such as EqualLogic.  However, Dell also sells deduplication technology from EMC/Data Domain, CommVault and Symantec.  Dave West at CommVault suggests that these technologies are complementary, and I agree. However, the announcement raises […]

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Storage pools and why they matter

Today SEPATON announced the addition of Storage Pools to our data protection platform.  The technology marks a major step in the path to data protection lifecycle management, and I am excited about the new functionality and wanted share some brief thoughts. To summarize, storage pooling allows data to be segmented into discrete pools that do […]

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Deduplication ratios and their impact on DR cost savings

There is an interesting blog discussion between Dipash Patel from CommVault and W. Curtis Preston from Backup Central and TruthinIT regarding the increasing or decreasing benefits of deduplication ratios. They take different perspectives on the benefits of increasing deduplication ratios and I will highlight their points and add an additional one to consider. Patel argues […]

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TSM Target Deduplication: You Get What You Pay For

I was recently pondering TSM’s implementation of target deduplication and decided to review ESG’s Lab Validation report on IBM TSM 6.1. There is quite a bit of good information in the paper, and some really interesting data about TSM’s target deduplication. Before discussing the results, it is important to understand the testing methodology. Enterprise Strategy […]

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TSM and Deduplication: 4 Reasons Why TSM Deduplication Ratios Suffer

TSM presents unique deduplication challenges due to its progressive incremental backup strategy and architectural design. This contrasts with the traditional full/incremental model used by competing backup software vendors. The result is that TSM users will see smaller deduplication ratios than their counterparts using NetBackup, NetWorker or Data Protector. This post explores four key reasons why […]

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Four Must Ask Questions About Metadata and Deduplication

When backing up data to a deduplication system, two types of data are generated. The first comprises objects being protected such as the Word documents, databases or Exchange message stores. These files will be deduplicated and for simplicity I will call this “object storage”. The second type of data generated is metadata. This is information […]

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SNW Recap

I returned from SNW in Phoenix last night and wanted to recap the event.  I had 10+ meetings at the show and there were multiple sessions and so am providing my perspectives on the event in general and the sessions I did attend. Deduplication remains hot and still confuses many I attended 5 different sessions […]

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Global Deduplication Explained

W. Curtis Preston recently authored an article on Searchstorage.com.au explaining global deduplication.  This is an important topic which frequently causes confusion.  Curtis does a good job explaining the technology and what it means to end users and  I recommend the article. A quick summary is that global deduplication means that a common deduplication repository is […]

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Deduplication 2.0

The folks over at the Online Storage Optimization blog recently wrote a post entitled Get Ready for Dedupe 2.0 where they outline their vision for the future of deduplication.  I read the post and was amazed at the similarity between their views and SEPATON’s core VTL architecture. I thought that it would be useful to […]

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Defragmentation, rehydration and deduplication

W. Curtis Preston recently blogged about The Rehydration Myth. In his post he discusses how restore performance on deduplicated data declines because of the method used to reassemble the fragmented deduplicated data on disk. He also addresses the ways various technologies attempt to overcome these issues, including disk caching, forward referencing (used by SEPATON’s DeltaStor […]

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