What is the purpose of shuffling and sorting phase in the reducer in Map Reduce

0 votes

Hi Guys,

I am new to Map Reduce. In Map Reduce programming, the reduce phase has shuffling, sorting, and reduction as its sub-parts. Can anyone tell me the purpose of the shuffling and sorting phase in the reducer in Map Reduce Programming?

Dec 20, 2020 in Big Data Hadoop by akhtar
• 38,230 points
6,283 views

1 answer to this question.

0 votes

Hi@akhtar,

Shuffle phase in Hadoop transfers the map output from Mapper to a Reducer in MapReduce. Sort phase in MapReduce covers the merging and sorting of map outputs. Data from the mapper are grouped by the key, split among reducers, and sorted by the key. Every reducer obtains all values associated with the same key. Shuffle and sort phase in Hadoop occur simultaneously and are done by the MapReduce framework.

Learn more about Big Data and its applications from the Azure Data Engineer certification.

answered Dec 20, 2020 by MD
• 95,440 points

Related Questions In Big Data Hadoop

0 votes
1 answer
0 votes
12 answers

What is Zookeeper? What is the purpose of Zookeeper in Hadoop Ecosystem?

Hey, Apache Zookeeper says that it is a ...READ MORE

answered Apr 29, 2019 in Big Data Hadoop by Gitika
• 65,910 points
28,202 views
0 votes
1 answer

What is the difference between Map-side join and Reduce-side join?

Join is a clause that combines the records ...READ MORE

answered Dec 13, 2018 in Big Data Hadoop by Omkar
• 69,210 points
4,983 views
0 votes
1 answer

What is the use of sequence file in Hadoop?

Sequence files are binary files containing serialized ...READ MORE

answered Apr 6, 2018 in Big Data Hadoop by Ashish
• 2,650 points
9,176 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
10,521 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
2,165 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
103,813 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
4,234 views
0 votes
1 answer

I have to ingest in hadoop cluster large number of files for testing , what is the best way to do it?

Hi@sonali, It depends on what kind of testing ...READ MORE

answered Jul 8, 2020 in Big Data Hadoop by MD
• 95,440 points
935 views
0 votes
1 answer

Change the owner and group of a file in Hadoop.

Hi@akhtar, You can use the Chown command. This ...READ MORE

answered Oct 1, 2020 in Big Data Hadoop by MD
• 95,440 points
7,514 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