title: Can Druid replace Cassandra?
body: <p>I cant help think that there aren't many use case that can be effectively served by Cassandra better than Druid. As a time series store or key value, queries can be written in Druid to extract data however needed. 
  The argument <a href="https://groups.google.com/forum/#!msg/druid-development/F4xyxoRaggk/1EYyoa3WoKwJ">here</a> is more around justifying Druid than Cassandra.</p>
  
  <p>Apart from the Fast writes in Cassandra, is there really anything else ? Esp given the real time aggregations/and querying capabilities of Druid, does it not outweigh Cassandra. </p>
  
  <p>For a more straight question that can be answered - doesnt Druid provide a superset of features as comapred to Cassandra and wouldn't one be better off in using druid rightaway? For all use cases? </p>