Also I just want to reiterate for the third time that I think Redis is a perfectly valid solution and I take no issue, at all, with you recommending it. If you read my reply to the OP carefully you will note I also included it amongst my recommendations before attempting to build a distributed system 
What I took issue with was this:
This is false. And I was not even the first person to point this out, it was @LostKobrakai - I was mostly just clarifying the point he made, since his reply was quite terse.
