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CCD-333 · Question #19
If you run the word count MapReduce program with m mappers and r reducers, how many output files will you get at the end of the job? And how many key-value pairs will there be in each file? Assume k…
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HBase Architecture and Fundamentals
Question
If you run the word count MapReduce program with m mappers and r reducers, how many output files will you get at the end of the job? And how many key-value pairs will there be in each file? Assume k is the number of unique words in the input files.
Options
- AThere will be r files, each with exactly k/r key-value pairs.
- BThere will be r files, each with approximately k/m key-value pairs.
- CThere will be r files, each with approximately k/r key-value pairs.
- DThere will be m files, each with exactlyk/m key value pairs.
- EThere will be m files, each with approximately k/m key-value pairs.
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Topics
#MapReduce#reducers#output files#key-value distribution