Tag Archives: w curtis preston

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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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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CommVault and Forward Referencing

I was recently reading this document from CommVault that highlights their deduplication technology and was surprised by their use of the term “forward referencing”. Forward referencing is a common term in deduplication with a generally agreed upon definition. CommVault appears to have redefined the word and promoted their version as a feature.  This is confusing […]

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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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W. Curtis Preston on physical tape

W. Curtis Preston recently wrote an article on the state of physical tape for SearchDataBackup. He talks about the technologies that backup software vendors have created technology to more effectively stream tape drives. As I posted before, if you cannot stream your tape drives, their performance will decline dramatically. In enterprise environments, performance is the […]

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Restore Performance

Scott from EMC posted about the EMC DL3D 4000 today. He was responding to some questions by W. Curtis Preston regarding the product and GA. I am not going to go into detail about the post, but wanted to clarify one point. He says: Restores from this [undeduplicated data] pool can be accomplished at up […]

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W. Curtis Preston Now with TechTarget

About a week ago, Curtis posted on his blog that he is joining TechTarget as an Executive Editor which essentially means that he will continue to present at various events. He is still an independent consultant and can keep working on his other projects including his Mr. Backup Blog and BackupCentral. In my opinion, this […]

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AboutRestore.com recognition

W. Curtis Preston the author of the Mr. Backup Blog recently posted an article about the blogs that he frequents. I was honored that he recognized AboutRestore.com along with blogs from other major vendors. Curtis mentioned his frustration with the comment filtering policies on some blogs and I wanted to clarify AboutRestore.com’s policy. (A synopsis […]

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