May 19, 2012

VMware PSP and SATP in Plain English

VMware's PSA is awash in abbreviations and options

I am often questioned during my Storage for Virtual Environments seminar presentations about VMware’s Pluggable Storage Architecture (PSA). This system is fairly straightforward and concept: VMware provides native multipathing support for a variety of storage arrays, and allows third parties to substitute their own plug-ins at various points in the stack. But the profusion of acronyms and third-party options makes it difficult for end-users to figure out what is going on.

Which Small Enterprise Storage Arrays Are Worth Considering?

SME storage arrays like the AberSAN Z-Series pack solid enterprise-class features

It’s never been a better time to be in the market for enterprise storage products, with many excellent options available at affordable prices. But the market can be confusing for the uninitiated, with a variety of network options and capabilities. Even those of us “in the know” about enterprise storage are sometimes surprised by the offerings and companies in this space! So when Jerome Wendt from DCIG approached me to collect data for a market overview and buyer’s guide, I was excited. It was my big chance to really get to know these products!

April Fools 2011 Roundup

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I love April Fools day. Like Halloween, it gives us all a chance to take ourselves a little less seriously and just have some fun. And the best April Fools pranks are those that point out real limitations in our thinking and mindset. That’s always been my April 1 goal: Why not combine Wi-Fi and PoE? And doesn’t the “giant iPod Touch” sound like a hoax?

VMware VAAI Storage Array Support in Plain English

The most exciting enhancements in VMware vSphere 4.1 is the addition of vStorage API for Array Integration (VAAI). This new API allows VMware ESX to offload storage processing functions to capable storage arrays, reducing the workload on the server hardware in introducing new and exciting possibilities for performance and efficiency. VAAI in ESX 4.1 includes three separate capabilities: block zeroing, full copy, and hardware assisted locking.

Back From the Pile: Interesting Links, January 21, 2011

Last week was cut short by attendance at EMC’s “Record Breaking” product launch. I covered the shenanigans and marketing antics already, and will dive deeper into the technical and product announcements later. Next week I’ll be at The Exec Event in Palo Alto, but have some posts ready to roll while I’m away!

EMC Taunts NetApp: Counting Coup or Poor Sportsmanship?

A NetApp contact provided this photo of the sidewalk logo

Today was a big one for EMC, with the company launching or updating 41 storage products, including the new VNX storage system. EMC’s press and analyst event was equally notable, with a large crowd of insiders (including me) brought to New York City to watch a sideshow of world records set. Although Wall Street noticed all the fuss and rewarded the company with a 52-week high stock price, some actions away from the Equitable Center drew the ire of EMC competitor, NetApp.

Storage for Server Virtualization: I Need Numbers

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As I work to build out my Storage for Server Virtualization seminar content, one thing becomes clear: I need numbers. The most-common question at events like this is, “how many people are using this or that?” It’s wrong to answer those questions anecdotally: Although I personally know people using NetApp, EqualLogic, HP, and EMC storage for their ESX environments, does this make them the market leaders? So I’m putting out a call for numbers: Please help me fill in these blanks!

Granularity of Thin Provisioning Approaches

Although I consider it the main stumbling block for thin provisioning, communication (or lack thereof) is being addressed with metadata monitoring, WRITE_SAME, the Veritas Thin API, and other ideas. But communication isn’t the only issue. Let’s talk about page sizes. You’ll often see vendors tossing this “softball” objection at their competitors, claiming that their (smaller) page size makes for more-effective thin provisioning. And that’s true, to a some extent.

Back From the Pile: Interesting Links, January 7, 2011

It’s been a slow week (the holidays) and a crazy one. I’ve started pouring out the thin provisioning series, with 10 posts so far, as well as launching a new video “talk show” about enterprise IT. And I’ve got a new post over at SearchStorage, too. Whew!

Is TRIM Useful For Thin Provisioning?

If WRITE_SAME can be a semaphore for thin un-provisioning, what about TRIM? It sounds like a perfect fit, and has wider implementation to boot! Let’s take a deeper look.