On May 20, 2008, at 9:03 AM, Saptarshi Guha wrote:
Hello,Does the "Data-local map tasks" counter mean the number of tasks that the had the input data already present on the machine on they are running on? i.e the wasn't a need to ship the data to them.
Yes. Your understanding is correct.More specifically it means that the map-task got scheduled on a machine on which one of the replicas of it's input-split-block was present and was served by the datanode running on that machine. *smile*
Arun
