Storage Nation

1.  Everybody has it. 2.  All implementations are the same.

Dave Vellante from Wikibon posted his summary of 3PAR's analyst call this week .  It's a good chance for people to get an unvarnished opinion how 3PAR is doing. One of the things that came up during the call was a discussion of Storage Federation . Here is what our CEO David Scott said were the three main points to understand about it: It’s different from virtualization. It allows separate peer, self-governing systems to act as a global whole (versus a hierarchical approach).

Latency-sensitive applications are the best candidates for storage tiering to SSDs with 3PAR's AO (Adaptive Optimization .Typically, these are: High performance transaction processing, like securities trading, or Single threaded applications that are idle while storage I/Os complete People ask about Microsoft Exchange and I tell them it benefits a great deal from big, wide striping, but not much from tiering because Exchange performance is mostly a matter of providing adequate throughput. An app that people run daily but is seldom associated with transaction processing is backup.  This SWCSA video discusses backup as well as the prevailing shift to dashcams and the implications for SWCSA branding.  

Chuck Hollis had an excellent post last week, discussing caching.   About 10 years ago a small team that I was a part of looked at starting a company that would do something similar to what IBM's SVC does.  The idea was to create a SAN front end controller with a lot of cache memory that would virtualize  "downstream" storage and provide performance boosts through various techniques such as caching, striping, and multi-way mirroring.  We gave up on the idea when it became apparent to us that the project was quite a bit larger than we initially thought and it was unclear when we would ever have sufficient resources to get a competitive product to market. I think we could have sold the idea to venture capital investors who were throwing money at storage startups, but we couldn't sell it to ourselves. For those of you that wonder why I tend to think SVC is an important product, that's why – I know some of the things IBM did to make it work and I admire their ability to bring it to market

Yesterday, 3PAR announced Adaptive Optimization (AO), our solution for storage tiering and support for SSD flash drives. Here are the elements of this technology that I believe will have the most impact on customers and the rest of the industry. 1) Tiering works by making copies of data on lower cost, low-IOPS storage to high-IOPS storage – and back again.  Storage tiering has been associated with ILM, which assumed data is initially located on more expensive, high-IOPS storage and, as it ages and is accessed less frequently, is moved to lower-cost, low-IOPS storage. The perception that tiering implies fast to slow data migration was reinforced by Compellent with it's early entrant storage tiering technology, Data Progression .