Hi all,
1. I don't understand the difference between NatureOrder-Scheduler and
MRR-Scheduler well.
It seems that MRR-Scheduler will prevent partitioner and shuffler
running until the reducer finishes; NatureOrder-Scheduler do nothing about
this and will start partitioner and shuffler at first.
2. If there are three leaf nodes in a dag and there is limited resource in
the cluster, no matter which scheduler we use, these three vertices will
run together. But the detail number of tasks of each vertex is depend on
the practical running situation.
Am I right?
3. Why I cannot find DAGPlan class in our latest version?
Thanks,
Tim
