When we started to build Metamarkets’ analytics solution, we tried several commercially available data stores. Our requirements were driven by our online advertising customers who have data volumes often upwards of hundreds of billions of events per month, and need highly interactive queries on the latest data as well as an ability to arbitrarily filter across any dimension – with data sets that contain 30 dimensions or more. For example, a typical query might be “find me how many advertisements were seen by female executives, aged 35 to 44, from the US, UK, and Canada, reading sports blogs on weekends.”