"becoming the leading open source solution" is something you can say that doesn't mean much and is difficult to prove or disprove. There are a number of entrenc

"becoming the leading open source solution" is something you can say that doesn't mean much and is difficult to prove or disprove. There are a number of entrenched players, open source and commercial that provide a column oriented database: http://www.timestored.com/time-series-data/column-oriented-databases http://www.timestored.com/time-series-data/column-oriented-d... That's a short description of 12 alternatives I wrote up. Druid does look interesting, it appears to have got the architecture pretty spot on and I'm going to look into it more.