Do ROI Calculators Produce Real ROI?

(Excerpt from original post on the Taneja Group News Blog)

As both a vendor product marketer and now an analyst, I’ve often been asked to help produce an “official” ROI (or the full TCO) calculator for some product. I used to love pulling out Excel and chaining together pages of cascading formulas.  But I’m getting older and wiser.  Now I see that ROI calculators are by and large just big rat holes. In fact I was asked again this week and, instead of quickly replying “yes, if you have enough money” and spinning out some rehashed spreadsheet (like some other IT analyst firms), I spent some time thinking about why the time and money spent producing detailed ROI calculators is usually a wasted investment, if not a wasted opportunity (to do better).

…(read the full post)

Figuring out the real price of flash technology

An IT industry analyst article published by SearchSolidStateStorage.

Sometimes comparing the costs of flash arrays is an apples-to-oranges affair — interesting, but not very helpful.

We’re often told by hybrid and all-flash array vendors that their particular total cost of ownership (TCO) is effectively lower than the other guy’s. We’ve even heard vendors claim that by taking certain particulars into account, the per-gigabyte price of their flash solution is lower than that of spinning disk. Individually, the arguments sound compelling; but stack them side by side and you quickly run into apples-and-oranges issues.

Storage has a lot of factors that should be profiled and evaluated such as IOPS, latency, bandwidth, protection, reliability, consistency and so on, and these must match up with client workloads with unique read/write mixes, burstiness, data sizes, metadata overhead and quality of service/service-level agreement requirements. Standard benchmarks may be interesting, but the best way to evaluate storage is to test it under your particular production workloads; a sophisticated load gen and modeling tool like that from Load DynamiX can help with that process.

But as analysts, when we try to make industry-level evaluations hoping to compare apples to apples, we run into a host of half-hidden factors we’d like to see made explicitly transparent if not standardized across the industry. Let’s take a closer look…

…(read the complete as-published article there)