Hi Pedro, You can read abt the hdfs placement policy at: http://hadoop.apache.org/common/docs/r0.20.2/hdfs_design.html
thanks mahadev On Fri, Feb 4, 2011 at 7:06 AM, Pedro Costa <psdc1...@gmail.com> wrote: > Hi, > > When hadoop is running in cluster, the output of the Reducers are > saved in HDFS. The MapReduce have also location awareness on where is > saved the data? > > For example, we've TT1 running in Machine1, and TT2 running in > Machine2. The replication of HDFS is 3. The Reduce Task RT1 is running > in TT1. So, when the reducer saves output in HDFS, 2 replicas of the > output goes to TT1 and the third one goes to TT2? Is this what > happens? > > Thanks, > > -- > Pedro >
