Question

At a high level, what is the purpose of the following mapper and reducer combination? Mapper FOR EACH line IN input FOR EACH number IN line emit (<”s”, number^2>) Reducer t = 0 FOR EACH value IN input list t = t + value emit(<”t”, t>)

Name: at a high level what is the purpose of the following mapper and reducer combination mapper for each line in input for each number in line emit s number2 reducer t 0 for each value in input l 15647
Uploaded: 2023-09-11T02:19:32-08:00
Duration: 3 min 17 s
Channel: Akash M
Description: at a high level what is the purpose of the following mapper and reducer combination mapper for each line in input for each number in line emit s number2 reducer t 0 for each value in input l 15647

          At a high level, what is the purpose of the following mapper and reducer combination?
Mapper
FOR EACH line IN input
 FOR EACH number IN line
    emit (<”s”, number^2>)
Reducer
t = 0
FOR EACH value IN input list
 t = t + value
emit(<”t”, t>)

Added by Lauren S.

Computer Science and Information Technology

Trishna Knowledge Systems 2018 Edition

Instant Answer

Solved by Expert Akash M

09/11/2023

Step 1

For each line, it iterates over each number present in that line. Show more…

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At a high level, what is the purpose of the following mapper and reducer combination? Mapper FOR EACH line IN input FOR EACH number IN line emit (<”s”, number^2>) Reducer t = 0 FOR EACH value IN input list t = t + value emit(<”t”, t>)