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re RATIOs in SSD architecture

and the value of comparing one
thing you might not understand
so well to the size of a more familiar nother

by Zsolt Kerekes, editor - June 18, 2018
SSD Jargon - Megabyte rows his boat to  a sign saying  flipper channel 3 milesA new blog -Memory for Compute - Where do we go From Here? - by Rob Peglar, President at Advanced Computation and Storage - among other things - comments on the shortcomings of legacy X86 processor designs when viewed from the stance of cores to memory channels (and - this is my scene setting not the words that Rob used - it's 2018 not 1999 for goodness sake! - we're paradiving into the memoryfication of everything era - we're falling through the air without a jetpack - so we don't have too much time for what-is-life - retrospection before we hit that water and start tasting real juicy vendor shark meat - spiced up to make it more palatable with big sprinklings of sponsored soothsayer seasoning. Or we may be the shark meat - or we may even put the shark to good use to pull our boat along - depending on your perspective).

On linkedin I said something along these lines...

"The ratio of processor cores to memory channels and local memory capacity is a solid pivot from which to leverage your forthcoming architecture blogs. I love ratios as they have always provided a simple way to communicate with readers the design choices in products which tell a lot to other experts in that field. So in the past Ive written about ratios like RAM cache to flash in SSDs, ratio of chips to controllers (small versus big controller architecture), fast server based PCIe SSD capacity ratio to SAN array capacity - which said a lot about the legacy software base (in 2012 when I wrote that note). I look forward to seeing your next couple of blogs and will tell my readers about them."

well readers - this is me making good on that promise

I was on my phone when I did the linkedin comment so I didn't extend the list to things like:- ratio of petabytes/kilowatts in network storage capacity - which led us to the petabyte SSD market, or the ratio of chips to storage capacity - aka design efficiency - (including raw flash to usable capacity - whatever that is - real or virtual - RAM is whatever the software is happy is BTW and in another universe could be implemented by self reparing fast paper tape). I could have made these lists longer... But I'm trying to break the habit.

The important thing is that you - as a regular mortal without having wasted all your life immersed in arcane technology - nevertheless do have a sporting chance of being able to rationally recognize the goodness or otherwise of complex emerging products -which very few people on the planet understand - for your own purposes and based on your own risk assessments - using the comparative power of ratios. And you don't need editors or analysts or vendors to tell you that the chosen outputs from their calculators (or sponsored opinions) is more right for you.

In my own career - even when I have done deep analysis and all that stuff - I have sometimes chosen the right direction by doing the sums wrong. But I've always been lucky.

Anyway - I think you should stay tuned to Rob Peglar's blogs - because I have a gut feel - the plot is going to get very interesting. ...read the article

Editor's additional comments:- And here's another thing... if you like the idea of using ratios to understand SSD design thinking then take a look too at some similar ideas I've written about which cut across the analysis of existing and future architectures in other ways.
  • the SSD design heresies - is a sanity check to remind you that designers don't always agree on the permutations of design features and technology adoption roadmaps favored by their competitors

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