Is Data locality concept applicable for Reducers also

0 votes

The concept of Data locality applies only to Mapper only as it deals with input files.

Is Reducers also will use Data locality concept while processing?

Data locality:

Data locality refers to the processing of the data where it resides by bringing the computation to the data, rather than requesting data from its location.

  1. While computing the data, Mappers and Reducers work.

  2. Mappers use Data locality while computing the data.

  3. Reducers take input as Mappers output.

Assuming that Mappers output (intermediate data) stored in different data nodes.

Are Reducers use Data locality while computing?

Nov 30, 2018 in Big Data Hadoop by Neha
• 6,300 points
306 views

1 answer to this question.

0 votes
No, Data-Locality concept applies to MAPPERS only.

Reducers are assigned based on partitioner logic (on unique keys of MAP outputs)
answered Nov 30, 2018 by Frankie
• 9,810 points

Related Questions In Big Data Hadoop

0 votes
1 answer

Which Operating system is more preferable for data node?

In a real installation (1 active namenode, ...READ MORE

answered Sep 4, 2018 in Big Data Hadoop by Neha
• 6,300 points
235 views
0 votes
1 answer
0 votes
1 answer

Hadoop MapReduce wordcount "type job is not applicable for the arguments" error

The combiner class is not required in ...READ MORE

answered Dec 19, 2018 in Big Data Hadoop by Omkar
• 69,110 points
182 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
7,110 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
1,141 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
51,654 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
2,688 views
0 votes
1 answer
0 votes
2 answers

How does Hadoop/Spark is used for building large analytics report?

The best possible framework for this task ...READ MORE

answered Aug 7, 2018 in Big Data Hadoop by kurt_cobain
• 9,390 points
249 views