If the performance of the system is not 3. 8 points Ben Bitdiddle

Question 8 / 15:

3. [8 points]: Ben Bitdiddle is using a MapReduce cluster (as described in reading #8) to process some data.

He finds that some of his programs are running slowly and needs your help to understand which performance enhancements to try.

For each of the following MapReduce configurations and suggested enhancements, circle True if the statement about the enhancement is true, and False otherwise.

If the performance of the system is not limited by network throughput or the rate at which map tasks can read from or write to the disk, then doubling the number of nodes in the system will probably improve performance if the number of map and reduce tasks is greater than the number of nodes.

A True

B False

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Explanation:

TRUE. Doubling the number of nodes will make more resources available to process map and reduce tasks, and there are abundant map and reduce tasks waiting to be processed.

Exam Home Page

https://www.jobilize.com/computer-system-engineering-exam-by-prof-samuel-madden-mit

Computer System Engineering 6.033 Spring 2006

Author:

Prof.Samuel MaddenProfessor

MIT Massachusetts Institute of Technology

USA

Access: Public Instant Grading

Attribution: Morris, Robert, and Samuel Madden. 6.033 Computer System Engineering, Spring 2009. (MIT OpenCourseWare: Massachusetts Institute of Technology), http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-033-computer-system-engineering-spring-2009 (Accessed 2 May, 2014). License: Creative Commons BY-NC-SA

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