How do I find duplicates in Hadoop file?

Asked by Last Modified  

Follow 0
Answer

Please enter your answer

Accounting Expert

In reducer please check the number of values grouped for each key. If you have more than one value you know you have a duplicate. If you just want the duplicate values, write out the keys that have multiple values.
Comments

Related Questions

Should Cloudera or MapR be used for Hadoop distribution?
Cloudera is preferred as MapR is discontinued and Cloudera offers strong support and integration.
Chandra
0 0
5
I want to learn Hadoop admin.
Hi Suresh, I am providing hadoop administration training which will lead you to clear the Cloudera Administrator Certification exam (CCA131). You can contact me for course details. Regards Biswanath
Suresh
What is difference between data science and SAP. Which is best in compare for getting jobs as fast as possible
Hi Both have different uniquness with importance value. you will get a good prospectives on SAP for career growth.
Ravindra
Is there a list of the world's largest Hadoop clusters on the web?
No . As pf now Yahoo has tested with 5000 nodes . but there is no such information .
Nishant
0 0
7
Hi everyone, What is Hadoop /bigdata and what is required qualification and work experience background for Hadoop/bigdata?
Hadoop is the core platform for structuring Big Data, and solves the problem of formatting it for subsequent analytics purposes. Hadoop uses a distributed computing architecture consisting of multiple...
Priya

Now ask question in any of the 1000+ Categories, and get Answers from Tutors and Trainers on UrbanPro.com

Ask a Question

Related Lessons

Solving the issue of Namenode not starting during Single Node Hadoop installation
On firing jps command, if you see that name node is not running during single node hadoop installation , then here are the steps to get Name Node running Problem: namenode not getting started Solution:...
B

Biswanath Banerjee

1 0
0

BigDATA HADOOP Infrastructure & Services: Basic Concept
Hadoop Cluster & Processes What is Hadoop Cluster? Hadoop cluster is the collections of one or more than one Linux Boxes. In a Hadoop cluster there should be a single Master(Linux machine/box) machine...

Bigdata hadoop training institute in pune
BigData What is BigData Characterstics of BigData Problems with BigData Handling BigData • Distributed Systems Introduction to Distributed Systems Problems with Existing Distributed...

Hadoop Development Syllabus
Hadoop 2 Development with Spark Big Data Introduction: What is Big Data Evolution of Big Data Benefits of Big Data Operational vs Analytical Big Data Need for Big Data Analytics Big...

How to change a managed table to external
ALTER TABLE <table> SET TBLPROPERTIES('EXTERNAL'='TRUE') This above property will change a managed table to an external table

Rahul Sharma

0 0
0

Recommended Articles

Big data is a phrase which is used to describe a very large amount of structured (or unstructured) data. This data is so “big” that it gets problematic to be handled using conventional database techniques and software.  A Big Data Scientist is a business employee who is responsible for handling and statistically evaluating...

Read full article >

Hadoop is a framework which has been developed for organizing and analysing big chunks of data for a business. Suppose you have a file larger than your system’s storage capacity and you can’t store it. Hadoop helps in storing bigger files than what could be stored on one particular server. You can therefore store very,...

Read full article >

In the domain of Information Technology, there is always a lot to learn and implement. However, some technologies have a relatively higher demand than the rest of the others. So here are some popular IT courses for the present and upcoming future: Cloud Computing Cloud Computing is a computing technique which is used...

Read full article >

We have already discussed why and how “Big Data” is all set to revolutionize our lives, professions and the way we communicate. Data is growing by leaps and bounds. The Walmart database handles over 2.6 petabytes of massive data from several million customer transactions every hour. Facebook database, similarly handles...

Read full article >

Find Hadoop near you

Looking for Hadoop ?

Learn from the Best Tutors on UrbanPro

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you