It’s obvious the author means well — and thanks to him for plugging the NOSQL Tapes! — but there are some seriously leaky assumptions at work here about a) how

It’s obvious the author means well — and thanks to him for plugging the NOSQL Tapes! — but there are some seriously leaky assumptions at work here about a) how Mongo, Redis (& RDBMSes) work and b) the extent to which this poorly-digested (or regurgitated) understanding applies to other NOSQL solutions. Too many shortcuts, inaccuracies, half-truths and implied errors to list here. The core idea of learning about NOSQL through first-hand experience (& dissection) of each project is sound, though.