On a cluster running MapReduce v1 (MRv1), a TaskTracker heartbeats into the JobTracker on your cluster, and alerts the JobTracker it has an open map task slot. What determines how the JobTracker assigns each map task to a TaskTracker?
A) The amount of RAM installed on the TaskTracker node.
B) The amount of free disk space on the TaskTracker node.
C) The number and speed of CPU cores on the TaskTracker node.
D) The average system load on the TaskTracker node over the past fifteen (15) minutes.
E) The location of the InsputSplit to be processed in relation to the location of the node.

Question

Quizplus · Accepted Answer

The JobTracker assigns map tasks to TaskTrackers based on data locality, meaning it tries to assign tasks to nodes where the data is already located to minimize data transfer and improve performance.

On a Cluster Running MapReduce V1 (MRv1), a TaskTracker Heartbeats