You could look at metrics the NN publishes, or look at/process the HDFS audit log.
On Wed, Apr 9, 2014 at 6:36 PM, Diwakar Sharma <diwakar.had...@gmail.com> wrote: > How and where to check how many datanode block address requests a namenode > gets when running a map reduce job. > > - Diwakar -- Harsh J
