A customer's nightly EMR job processes a single 2-TB data file stored on Amazon Simple Storage Service (S3). The EMR job runs on two On-Demand core nodes and three On-Demand task nodes. Which of the following may help reduce the EMR job completion time?
A. Use three Spot Instances rather than three On-Demand instances for the task nodes.
B. Change the input split size in the MapReduce job configuration.
C. Use a bootstrap action to present the S3 bucket as a local filesystem.
D. Launch the core nodes and task nodes within an Amazon Virtual Cloud.
E. Adjust the number of simultaneous mapper tasks.
F. Enable termination protection for the job flow.
Answer:
B. Change the input split size in the MapReduce job configuration.
E. Adjust the number of simultaneous mapper tasks.
You might also like to view...
Using the Windows 10 ________ app, you can get your music, photos, and Cortana reminders on your phone
A) Phone Companion B) Assistant C) Microsoft Sync D) Windows Mobile
Answer the following statements true (T) or false (F)
1) There are four basic ways to traverse a tree, and they are all implemented recursively. 2) A decision tree cannot be used as the basis for an expert system. 3) In an inorder traversal, the elements of a tree are visited in order of their distance from the root. 4) In a postorder traversal, the root is the last element visited in the tree. 5) Recursive methods that work with binary trees are often implemented with a private support method.