Sentence examples for reduced tasks for from inspiring English sources
Figure 9 shows a typical assignment of experiment #3 with reduced tasks for visual clarity.
We employed 20 instances and each of them is configured with a maximum of 2 map tasks and 1 reduce task (we don't have reduce tasks for PML) for task trackers.
Since several map tasks can read entities in parallel and process them, the reduce adds one more load balancing level between the map task and the reduce task for the purpose of decreasing the overload on these tasks.
Each TaskTraker has a configurable number of task slots for task assignment (two slots for map tasks and two for reduce tasks by default), so that the resources of a TaskTraker node can be fully utilized.
In addition, its scheduling policy requires the map and reduce tasks to be the same for many algorithms including: PageRank, SSSP, and connected components.
The main difference of the two versions is the fact that MapReduce 2 no longer considers separately the slots used for the map and reduce tasks, but for each node, it defines the number of containers it can support.
Our model can be easily extended to support this new version of Hadoop as we still have to determine how the containers should be allocated for the execution of map and reduce tasks (i.e., how many container will be used for map/reduce tasks).
While for the map/reduce task adjustment, we use a Hill climbing algorithm that gradually increases the number of map and reduce tasks used for the job, keeping the configuration that minimizes its execution time.
Regarding the Yahoo! workload, we simulated the task execution similarly to [23], so tasks were modelled via a normal distribution with 50 mean and 200 standard deviation for map tasks' execution times, while for reduce tasks, the mean was 100 and the standard deviation 300.
The retrieved data are stored on the memory buffer for reduce tasks.
MapReduce jobs require communication between map and reduce stages since map outputs are used as input for reduce tasks.
