[jrosoff]

Yeah slide 11 depicted what we thought would be a great solution before we started investigating MongoDB. MongoDB effectively replaced all those other systems for us and was _significantly_ easier to set up and develop against.

A few people have mentioned HBase as an alternative. We did not consider HBase at the time we were making our architecture choices, however if we were starting today, we'd probably have looked at it too. My first impressions of HBase are that it lacks the level of documentation & community support behind MongoDB. I am definitely going to dig in some more to see how it would compare. That being said, we're totally happy with our choice of MongoDB and would recommend it to anybody considering HBase.