MapReduce Example | MapReduce Programming | Hadoop MapReduce Tutorial | Edureka
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The document outlines a Hadoop certification training agenda focusing on MapReduce concepts, including the structure of MapReduce programs, examples, and testing frameworks like MRUnit. It covers essential packages, classes, and provides specific use cases such as analytics on weather data and unique listener counts from music logs. Learning resources and further reading materials are also provided for attendees.
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Hadoop map reduce conceptsSubhas Kumar Ghosh The document describes Hadoop MapReduce and its key concepts. It discusses how MapReduce allows for parallel processing of large datasets across clusters of computers using a simple programming model. It provides details on the MapReduce architecture, including the JobTracker master and TaskTracker slaves. It also gives examples of common MapReduce algorithms and patterns like counting, sorting, joins and iterative processing.
Hadoop Overview kdd2011
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Apache Hadoop Tutorial | Hadoop Tutorial For Beginners | Big Data Hadoop | Ha...
Apache Hadoop Tutorial | Hadoop Tutorial For Beginners | Big Data Hadoop | Ha...Edureka! The document outlines an Edureka Hadoop certification training agenda, covering concepts such as the definition of big data, Hadoop's architecture and core components, data processing mechanisms like MapReduce, and real-world use cases like analyzing Olympic datasets. It explains the challenges of traditional data processing systems and the necessity of using distributed computing frameworks like Hadoop to manage large datasets effectively. Additionally, it discusses the architecture of Hadoop, including its master/slave setup and components such as NameNode and DataNode, as well as the workflow of MapReduce jobs.
Hadoop online training course
Hadoop online training courseKamal A Certified Hadoop Professional
Schedule: Flexible. Weekdays/Weekends. 1-2 Hours per day.
Price: $499
Contact: [email protected]
Hadoop certification training
Hadoop certification trainingMagnific Trainings This document outlines the topics covered in a Hadoop certification training course, including introductions to big data, Hadoop, the Hadoop ecosystem, MapReduce concepts, Pig, Hive, Oozie, HBase, real-life use cases, HDFS, cluster understanding, typical workflows, writing and reading files from HDFS, rack awareness, the MapReduce programming model, developing MapReduce applications, data types and file formats.
Njug presentation
Njug presentationiwrigley The document provides an overview of MapReduce and Hadoop, explaining that MapReduce is a programming model for processing large datasets in a distributed manner using map and reduce functions, and that Hadoop is an open-source software framework for reliable, scalable, distributed computing of large datasets across clusters of computers using MapReduce. It also gives examples of common uses of MapReduce and outlines some basic Java API concepts for writing MapReduce programs in Hadoop.
2. Develop a MapReduce program to calculate the frequency of a given word in ...
2. Develop a MapReduce program to calculate the frequency of a given word in ...Prof. Maulik Trivedi
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MapReduce Example | MapReduce Programming | Hadoop MapReduce Tutorial | Edureka
- 2. www.edureka.co/big-data-and-hadoopEDUREKA HADOOP CERTIFICATION TRAINING Agenda for today’s Session MapReduce Way Classes and Packages in MapReduce Explanation of a Complete MapReduce Program MapReduce Examples on Analytics MapReduce Example on Testing
- 3. www.edureka.co/big-data-and-hadoopEDUREKA HADOOP CERTIFICATION TRAINING MapReduce Example on Word Count Process
- 4. www.edureka.co/big-data-and-hadoopEDUREKA HADOOP CERTIFICATION TRAINING MapReduce Way
- 5. www.edureka.co/big-data-and-hadoopEDUREKA HADOOP CERTIFICATION TRAINING MapReduce Way – Word Count Process
- 6. www.edureka.co/big-data-and-hadoopEDUREKA HADOOP CERTIFICATION TRAINING Input/Output Classes in MapReduce
- 7. www.edureka.co/big-data-and-hadoopEDUREKA HADOOP CERTIFICATION TRAINING Input Format – Class Hierarchy
- 8. www.edureka.co/big-data-and-hadoopEDUREKA HADOOP CERTIFICATION TRAINING Output Format – Class Hierarchy
- 9. www.edureka.co/big-data-and-hadoopEDUREKA HADOOP CERTIFICATION TRAINING Packages and Classes in Word Count MapReduce Example
- 10. www.edureka.co/big-data-and-hadoopEDUREKA HADOOP CERTIFICATION TRAINING Packages to Import import java.io.IOException; import java.util.*; import org.apache.hadoop.fs.Path; import org.apache.hadoop.conf.*; import org.apache.hadoop.io.*; import org.apache.hadoop.mapreduce.*; import org.apache.hadoop.mapreduce.lib.input.FileInputFormat; import org.apache.hadoop.mapreduce.lib.input.TextInputFormat; import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat; import org.apache.hadoop.mapreduce.lib.output.TextOutputFormat; All these packages are present in hadoop-common.jar All these packages are present in hadoop-mapreduce- client-core.jar
- 11. www.edureka.co/big-data-and-hadoopEDUREKA HADOOP CERTIFICATION TRAINING Mapper Class public static class Map extends Mapper<LongWritable, Text, Text, IntWritable> { Name of the Mapper Class which inherits Super Class Mapper Mapper Class takes 4 Arguments i.e. Mapper<KEYIN, VALUEIN, KEYOUT, VALUEOUT>
- 12. www.edureka.co/big-data-and-hadoopEDUREKA HADOOP CERTIFICATION TRAINING Reducer Class public static class Reduce extends Reducer<Text, IntWritable, Text, IntWritable> { Name of the Reducer Class which inherits Super Class Reducer Reducer Class takes 4 Arguments i.e. Reducer <KEYIN, VALUEIN, KEYOUT, VALUEOUT>
- 13. www.edureka.co/big-data-and-hadoopEDUREKA HADOOP CERTIFICATION TRAINING Its Time to see some MapReduce Examples
- 14. www.edureka.co/big-data-and-hadoopEDUREKA HADOOP CERTIFICATION TRAINING MapReduce is useful in a wide range of applications in multiple domains. It is majorly used for 2 things: Analytics: Process the data and give the desired results Testing: Perform few test cases using MRUnit
- 15. www.edureka.co/big-data-and-hadoopEDUREKA HADOOP CERTIFICATION TRAINING Let us see few MapReduce Examples on Analytics
- 16. www.edureka.co/big-data-and-hadoopEDUREKA HADOOP CERTIFICATION TRAINING MapReduce Temperature Example
- 17. www.edureka.co/big-data-and-hadoopEDUREKA HADOOP CERTIFICATION TRAINING Weather Forecasting Problem Statement: » Analysing weather data of Austin to determine Hot and Cold Days. We have weather data set of Austin by NCIE. NOAA's National Centres for Environmental Information (NCEI) (previously NCDC) is responsible for preserving, monitoring, assessing, and providing public access to the Nation's treasure of climate and historical weather data and information. Refer -> ftp://ftp.ncdc.noaa.gov/pub/data/uscrn/products/daily01 Temperature Example
- 18. www.edureka.co/big-data-and-hadoopEDUREKA HADOOP CERTIFICATION TRAINING Temperature Example - Weather Dataset 6th Column Max Temp 6th Column Min Temp
- 19. www.edureka.co/big-data-and-hadoopEDUREKA HADOOP CERTIFICATION TRAINING MapReduce Example
- 20. www.edureka.co/big-data-and-hadoopEDUREKA HADOOP CERTIFICATION TRAINING Last.fm Example is an online music website where users listen to various tracks, the data gets collected like shown below. Write a map reduce program to get the Number of unique listeners. The data is coming in log files and looks like as shown below: UserId TrackId Shared Radio Skip 100001 150 1 1 0 100005 103 0 0 1 100142 78 1 0 0 110005 289 1 0 1
- 21. www.edureka.co/big-data-and-hadoopEDUREKA HADOOP CERTIFICATION TRAINING Let us see a MapReduce Example on Testing
- 22. www.edureka.co/big-data-and-hadoopEDUREKA HADOOP CERTIFICATION TRAINING MRUnit Testing Framework Provides 4 drivers for separately testing MapReduce code » MapDriver » ReduceDriver » MapReduceDriver » PipelineMapReduceDriver Helps in filling the gap between MapReduce programs and JUnit* Better control on log messages with JUnit Integration *JUnit is a simple framework to write repeatable tests.
- 23. www.edureka.co/big-data-and-hadoopEDUREKA HADOOP CERTIFICATION TRAINING MapReduce MRUnit Example
- 24. www.edureka.co/big-data-and-hadoopEDUREKA HADOOP CERTIFICATION TRAINING Learning Resources Hadoop Tutorial: www.edureka.co/blog/hadoop-tutorial MapReduce Tutorial: www.edureka.co/blog/mapreduce-tutorial MapReduce Interview Questions: www.edureka.co/blog/interview-questions/hadoop-interview-questions-mapreduce
- 25. www.edureka.co/big-data-and-hadoopEDUREKA HADOOP CERTIFICATION TRAINING Thank You … Questions/Queries/Feedback