Amit, dfs.replication defines how many time each block of data will be replicated. In your setup, if you're planning on keeping only one datanode, a value of 1 will reduce the overhead since keeping 2 or more copies of each block would be useless if you lose your node. More info on how replication works here : http://hadoop.apache.org/core/docs/r0.18.1/hdfs_design.html#Data+Replication
J-D On Sat, Oct 11, 2008 at 4:51 PM, Amit k. Saha <[EMAIL PROTECTED]> wrote: > Hi! > What does the value of the property: "dfs.replication" determine? > > Say, I have 3 nodes: Name node, Job Tracker and task tracker cum data > node. What should my "dfs.replication" be? > > Thanks. > Amit > > -- > Amit Kumar Saha > http://blogs.sun.com/amitsaha/ > http://amitsaha.in.googlepages.com/ > Skype: amitkumarsaha >
