Hi Vivian. Take a look at TextInputFormat and the RecordReader classes. This is set via JobConf.setInputFormat().
-Chuck -----Original Message----- From: Vivi Lang [mailto:sqlxwei...@gmail.com] Sent: Wednesday, September 12, 2012 5:10 PM To: hdfs-dev@hadoop.apache.org Subject: Question about Hi all, Is there anyone who can tell me that when we lanuch a mapreduce task, for example, wordcount, after the JobClient obtained the block locations (the related hosts/datanodes are stored in the specified split), which function/class will be called for reading those blocks from the datanode? Thanks, Vivian SDL Enterprise Technologies, Inc. - all rights reserved. The information contained in this email may be confidential and/or legally privileged. It has been sent for the sole use of the intended recipient(s). If you are not the intended recipient of this mail, you are hereby notified that any unauthorized review, use, disclosure, dissemination, distribution, or copying of this communication, or any of its contents, is strictly prohibited. If you have received this communication in error, please reply to the sender and destroy all copies of the message. Registered address: 69 Hickory Drive, 3rd Floor, Waltham, MA 02451, USA
