For some parts of a task the system stores information on the local (non-HDFS) file system of the node that is actually running the job. That is the FILE_.. Stuff written to HDFS is the HDFS_...
HTH 2010/11/30 <[email protected]>: > When an hadoop MapReduce example is executed, at the end of the example it's > showed a table with all the information about the execution, like the number > of Map and Reduce tasks executed, the number of bytes read and written. > > In this information it exists 2 fields FILE_BYTES_WRITTEN and > HDFS_BYTES_WRITTEN. What's the difference between these 2 fields? > > Thanks, > Pedro -- Met vriendelijke groeten, Niels Basjes
