Although the core issues with thin provisioning revolve around communication, it presents unique challenges to the storage array as well. We talked about granularity of pages, and the comments for that piece were extremely enlightening. Now let's consider another key factor: Scheduling. Note that the "provisioning" part is relatively easy to do on the fly: An array just has … [Read more...] about Processing and Scheduling Thin Provisioning
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 … [Read more...] about VMware VAAI Storage Array Support in Plain English
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 … [Read more...] about Granularity of Thin Provisioning Approaches
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! My State of the Art Thin Provisioning series Storage is Not Getting Cheaper Thin Provisioning: Attacking Storage … [Read more...] about Back From the Pile: Interesting Links, January 7, 2011
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. First, I'd like to remind the reader that I'm not some specialist storage engineer. I am regular guy who wanted to know about this TRIM thing. I welcome corrections and feedback on this piece! We … [Read more...] about Is TRIM Useful For Thin Provisioning?