The map output doesn't get written to HDFS. The map task writes its output to its local disk, the reduce tasks will pull the data through HTTP for further processing.
Am 21.05.2013 um 19:57 schrieb John Lilley <john.lil...@redpoint.net>: > When MapReduce enters “shuffle” to partition the tuples, I am assuming that > it writes intermediate data to HDFS. What replication factor is used for > those temporary files? > john > -- Kai Voigt k...@123.org
