Vishnu, You have to have a file system that is accessible from all nodes involved to run Hadoop Map Reduce. This could be NFS if it is a small number of nodes or even the local file system if you are just running one node. But, with that said Hadoop is designed to process big data GB, TB, and even PB, so HDFS or some other distributed File System is best if that is what you are doing. You can use it simply to distribute a computing job to several different machines, but Hadoop Map Reduce still needs a file system as part of the distribution mechanism.
--Bobby Evans On 5/26/11 10:46 AM, "vishnu krishnan" <vgrkrish...@gmail.com> wrote: am new in map reduce. one think i have to know. can i use the map reduce pgm without any file system?
