Mapreduce shuffle and sort

0 votes

For each mapreduce, is shuffle and sort operation performed before or its happened after the completion of all mappers?

Dec 27, 2018 in Big Data Hadoop by slayer
• 29,350 points
474 views

1 answer to this question.

0 votes

The mapreduce task happens in the following order

  1. Mapping
  2. Shuffle
  3. Sort
  4. Reduce

Shuffle can happen while mappers are generating data since it is only a data transfer. But the sort and reduce can only start once all the mappers are done.

answered Dec 27, 2018 by Omkar
• 69,210 points

Related Questions In Big Data Hadoop

0 votes
1 answer
0 votes
1 answer
0 votes
1 answer

What is the difference between Hadoop MapReduce and built-in MapReduce?

Differences are as follows: Hadoop's MR can be ...READ MORE

answered Sep 11, 2018 in Big Data Hadoop by Frankie
• 9,830 points
1,181 views
0 votes
1 answer

What is the difference between MapRed and MapReduce?

Firstly, we must learn that these are ...READ MORE

answered Mar 6, 2019 in Big Data Hadoop by nitinrawat895
• 11,380 points
1,675 views
+1 vote
1 answer

Hadoop Mapreduce word count Program

Firstly you need to understand the concept ...READ MORE

answered Mar 16, 2018 in Data Analytics by nitinrawat895
• 11,380 points
10,556 views
0 votes
1 answer

hadoop.mapred vs hadoop.mapreduce?

org.apache.hadoop.mapred is the Old API  org.apache.hadoop.mapreduce is the ...READ MORE

answered Mar 16, 2018 in Data Analytics by nitinrawat895
• 11,380 points
2,184 views
+2 votes
11 answers

hadoop fs -put command?

Hi, You can create one directory in HDFS ...READ MORE

answered Mar 16, 2018 in Big Data Hadoop by nitinrawat895
• 11,380 points
104,204 views
–1 vote
1 answer

Hadoop dfs -ls command?

In your case there is no difference ...READ MORE

answered Mar 16, 2018 in Big Data Hadoop by kurt_cobain
• 9,390 points
4,260 views
0 votes
1 answer

What is the difference between MapReduce and YARN in Hadoop?

MapReduce: MapReduce is an algorithm used to store ...READ MORE

answered Dec 19, 2018 in Big Data Hadoop by Omkar
• 69,210 points
5,022 views
0 votes
1 answer

Difference between hive.exec.compress.output=true; and mapreduce.output.fileoutputformat.compress=true;

Hey there! The definition of these two properties ...READ MORE

answered Dec 28, 2018 in Big Data Hadoop by Omkar
• 69,210 points
5,515 views
webinar REGISTER FOR FREE WEBINAR X
REGISTER NOW
webinar_success Thank you for registering Join Edureka Meetup community for 100+ Free Webinars each month JOIN MEETUP GROUP