Hi All,
Thanks a lot for taking out your time to answer my question. I am trying to implement a file system in hadoop under irg.apache.hadoop.fs package something similar to KFS, glusterfs, etc. I wanted to know is that in README.txt of glusterfs it is mentioned : >> # ./bin/start-mapred.sh If the map/reduce job/task trackers are up, all I/O will be done to GlusterFS. So, suppose my input files are scattered in different nodes(glusterfs servers), how do I(hadoop client having glusterfs plugged in) issue a Mapreduce command? Moreover, after issuing a Mapreduce command would my hadoop client fetch all the data from different servers to my local machine and then do a Mapreduce or would it start the TaskTracker daemons on the machine(s) where the input file(s) are located and perform a Mapreduce there? Please rectify me if I am wrong but I suppose that the location of input files top Mapreduce is being returned by the function *getFileBlockLocations * *(*FileStatus file*,* *long* start*,* *long* len*). * Thank you very much for your time and helping me out. Regards, Nikhil
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