title: Google BigQuery Underlying Architecture
body: <p>So I just started messing around with Google BigQuery about 10 minutes ago, and I was wondering if anyone is aware of the underlying architecture that they're using to store the data?  For example, is this just the next generation of their own BigTable infrastructure?  </p>
  
  <p>Also, is it clear what sorts of strategies they're using for indexes, index rebuilds, etc?  I'm just trying to analyze whether this is mature enough at this point where you can be 100% sure of what's going on with your data end-to-end, or is there a bit of a black box area where "things just work"?</p>