What happens in the telephone game is that a little bit of information gets lost at each step along the path, and at the end of the chain you’ve basically lost all the information. And this happens all the time in computers, especially in data storage. Thin reclamation is the core technical challenge to thin provisioning, and the telephone game is the reason.
Archives for December 2010
De-Allocating is the Core Issue for Thin Provisioning
One of the biggest problems for thin provisioning is not the provisioning part: It’s fairly easy for a storage array to allocate on request: “I need a block; here’s some data I want you to write.” And the storage array just starts allocating, and allocating. But, the operating system never goes back and says “I don’t need that block anymore.”
Thin Provisioning: Attacking Storage Utilization
Thin provisioning doesn’t take on the cost of capacity, it actually attacks the overhead of inefficient provisioning. Not all of that overhead is inefficiency, and not all of that can be tackled with thin provisioning. But some of it can. It’s a lot more of the cost than can be tackled by moving to SATA, for example. That I really like.
Back From the Pile: Interesting Links, December 24, 2010
Happy end-of-the-year week! I’ll be posting an 11-part series on thin provisioning starting today, but last week was eventful as well. I introduced my enterprise IT events calendar and wrote more about HP’s expiring ink and my HP printer’s demise. It was also time to write about The Four Stages of Vendor Blogging and advising my clients to Always Punch Above Their Weight.
Storage is Not Getting Cheaper
Why do we care about thin provisioning? Because storage is not getting cheaper. If you went to buy a disk ten years ago, you’re going to spend about the same as would today, but you’re going to get a lot more capacity – a lot more capacity! The fact that we have terrible utilization of enterprise resources is really not helping us, and it’s not getting any better. It hasn’t improved because they are “doing storage” the same way.