Hadoop 2.0 was launched as an improvement over Hadoop 1.0 because the first version suffered from many drawbacks. Hadoop 1.0 does not facilitate the batch procession of vast amounts of data already present in the Hadoop system. The maximum node cluster supported by Hadoop 1.0 is only 4000. Furthermore, there is only one Name node and Namespace per cluster. It is a single-purpose system which can only be run on MapReduce based jobs. This is why Hadoop 2.0 is becoming famous, as many limitations have been corrected in the second version.