What is reduce() action in Spark?

0 votes

Can anyone explain how reduce() function works in Spark?

Jul 2 in Apache Spark by amrita

recategorized Jul 4 by Gitika 160 views

1 answer to this question.

0 votes

Hey,

It takes a function that operates on two elements of the type in your RDD and returns a new element of the same type. A simple example of such a function is +, which we can use to sum our RDD.

 With reduce(), we can easily sum the elements of our RDD, count the number of elements, and perform other types of aggregations.

answered Jul 2 by Gitika
• 25,360 points

Related Questions In Apache Spark

0 votes
1 answer

Can anyone explain what is RDD in Spark?

RDD is a fundamental data structure of ...READ MORE

answered May 24, 2018 in Apache Spark by Shubham
• 13,310 points
638 views
0 votes
1 answer

Spark 2.3? What is new in it?

Here are the changes in new version ...READ MORE

answered May 28, 2018 in Apache Spark by kurt_cobain
• 9,260 points
70 views
+1 vote
3 answers

What is the difference between rdd and dataframes in Apache Spark ?

Comparison between Spark RDD vs DataFrame 1. Release ...READ MORE

answered Aug 27, 2018 in Apache Spark by shams
• 3,580 points
17,178 views
0 votes
1 answer

What is Executor Memory in a Spark application?

Every spark application has same fixed heap ...READ MORE

answered Jan 4 in Apache Spark by Frankie
• 9,810 points
652 views
0 votes
1 answer
0 votes
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
• 10,730 points
3,371 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
• 10,730 points
406 views
0 votes
10 answers

hadoop fs -put command?

put syntax: put <localSrc> <dest> copy syntax: copyFr ...READ MORE

answered Dec 7, 2018 in Big Data Hadoop by Aditya
16,767 views
0 votes
1 answer

What is Action in Spark?

Hi, Actions are RDD’s operation, that value returns ...READ MORE

answered Jul 3 in Apache Spark by Gitika
• 25,360 points
28 views
0 votes
1 answer

What does reduce action do in Spark?

Hey, Reduce action converts an RDD to a ...READ MORE

answered Jul 4 in Apache Spark by Gitika
• 25,360 points
27 views