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July 07, 2009


Val Bercovici

I like your epiphany Vaughn!

As we like to say about VMware marketshare lately:

"Incumbency is not a sustainable competitive advantage"

Rich Barlow

Good stuff Vaughn. You have the nicest way of sticking your finger in folks eyes :)

John Webster

IMO a confusing piece. Where I think you run into trouble is here:

"May I be frank? What’s the difference between an EVA, a Symmetrix, and a PS6000S once you’ve deployed VMware on it? Seriously, what’s the difference? All of these arrays are production worthy, they all provide shared storage, redundant paths to targets, array based replication, etc.

The physical hardware architectures of storage arrays have no impact on the abilities of a Virtual Machine. If the array provides shared access, than it will do. So where’s the virtualization, or their advantages of these arrays with VMware, Hyper-V, or Xen Server?"

The argument over where to posit data management - host vs. storage device - has been going on for years and VMware et.al. only prolong the argument. Veritas tried years ago to get users to run data replication functions host-to-host in an effort to dent EMC's considerable SRDF and Timefinder revenues. It didn't work. Yes one can do data management from VMware but since the introduction of IBM's XRC back in the '80s, one need not have virtualized storage to do data management at the storage layer. The question of where to best do data management - host vs. storage - continues to be one worht researching by users and especially by VMware users. If you're trying to argue the case for virtualized storage here, fine, but "commodity" storage as defined in this post still has life as a data management platform.

Mike Riley

I think what Vaughn is saying is that the hardware products mentioned are certainly serviceable for data storage. I'm seeing a lot of customers demanding advanced data management features like thin provisioning, cloning, and dedupe. You can best enable these features on a virtualized storage platform. Shameless plug but I talk about how having this virtualization as part of our storage DNA gives us an optimal foundation for these bringing advanced storage features to market.

PART I & II: Storage Efficiency Defined

I definitely think we have an advantage vs. the legacy storage arrays who will have to bolt-on or shim-in a virtualization layer.



What you fail to mention is that the two surveys had different parameters. The first allowed only one entry and the second allowed multiple. (notice how in the 2nd survey they add up to way over 100%) Your post reminds me of a tobacco company's statistical analysis of death rates caused by cigarettes. (Only 5 people this year died of Cigarettes, but last year 250,000 died of lung cancer that is a 99% decrease Thanks to our light brand!)

This however is the most absurd statement I have read in a long time "What’s the difference between an EVA, a Symmetrix, and a PS6000S once you’ve deployed VMware on it?" The Answer: Aggregate performance and reliability. The last single point of failure and performance degregation in a Virtualized IT environment is the array. Your smarter than this Vaughn.....

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