2010/4/9 Onur AKTAS <onur.ak...@live.com>: > ... > I'm trying to find out how do you perform queries with calculations on the > fly without inserting the data as calculated from the beginning. > Lets say we have latitude and longitude coordinates of all users and we have > Distance(from_lat, from_long, to_lat, to_long) function which > gives distance between lat/longs pairs in kilometers.
I'm not an expert, but I think that it boils down to "MapReduce" and "Hadoop". I don't think that there's any top-down tutorial on those two words, you'll have to research yourself starting here: * http://en.wikipedia.org/wiki/MapReduce * http://hadoop.apache.org/ * http://wiki.apache.org/cassandra/HadoopSupport I don't think it is all documented in any one place yet... Paul Prescod
