One way of looking at it is that S4 is to map-reduce what Streambase or Coral8 are to SQL. In the enterprise software world, this is what's called CEP - Comple

One way of looking at it is that S4 is to map-reduce what Streambase or Coral8 are to SQL. In the enterprise software world, this is what's called CEP - Complex Event Processing: http://en.wikipedia.org/wiki/Complex_event_processing http://en.wikipedia.org/wiki/Complex_event_processing