Mappers write to local persistance and reducers write to hdfs - Jagaran
________________________________ From: Aishwarya Venkataraman <avenk...@cs.ucsd.edu> To: common-dev@hadoop.apache.org Sent: Sat, 28 May, 2011 4:11:13 PM Subject: Question regarding network data transfer Hello, Where exactly(Java class) does the network data transfer happen from a mapper to a reducer ? Mapper seems to be writing data to the HDFS. Does reducer read data from the mapper's HDFS over the network ? This is evading me. Thanks in advance for the help. Cheers, Aishwarya
