I don't really agree about Hadoop. MapReduce is interesting for some applications but it's not the only thing out there. We did extensive analysis of MapReduce

I don't really agree about Hadoop. MapReduce is interesting for some applications but it's not the only thing out there. We did extensive analysis of MapReduce at my new company and it clearly wasn't suitable for our needs. You say that as if MapReduce is the only thing you can do with Hadoop. It has a key/value datastore too, and since recently a relational database: http://db.cs.yale.edu/hadoopdb/hadoopdb.html http://db.cs.yale.edu/hadoopdb/hadoopdb.html