Hadoop Custom Output Format Example

Table of Contents1. Overview2. Development Environment3. Steps for creating custom Output Format3.1 extends OutputFormat class3.2 implements getRecordWriter method3.3 Create Custom RecordWriter class4. Example4.1 Problem Statement & Solution4.2 pom.xml4.3 WordCountOutputFormat4.4 WordCountLineRecordWriter4.5…

HADOOP CREATE CUSTOM KEY WRITABLE

Hadoop Create Custom Key Writable Example

Table of Contents1. Overview2. Development Environment3. Steps for creating custom Key writable data types3.1 Implement WritableComparable Interface3.2 write method3.3 readFields method3.4 Add Default Constructor3.5 equals and hashCode3.6 compareTo4. Sample Input File5. Example5.1…

HADOOP CREATE CUSTOM VALUE WRITABLE EXAMPLE

Hadoop Create Custom Value Writable Example

Table of Contents1. Overview2. Development Environment3. Steps for creating custom value writable data types3.1 Implement Writable Interface3.2 write method3.3 readFields method3.4 Add Default Constructor4. Sample Input File5. Example5.1 pom.xml5.2 FamilyWritable5.3 FamilyMapper5.4 FamilyReducer5.5…

Debug Hadoop Map Reduce Code

Table of Contents1. Overview2. Development Environment3. Steps To Debug Code locally3.1 Add hadoop-mapreduce-client-jobclient maven dependency3.2 Set local file system3.2 Set Number of mappers and reducers4. Example4.1 pom.xml4.2 MultipleOutpusDebugDriver.java4.3 MultipleOutpusMapper.java5. Build & Debug6….

Hadoop Multiple Outputs Example

Hadoop Multiple Outputs Example

Table of Contents1. Overview2. Development Environment3. MultipleOutputs4. Sample Input 5. Example5.1 pom.xml5.2 MultipleOutputsDriver5.3 MultipleOutputsMapper6. Steps To Run6.1 Build & Prepare Jar6.2 Copy Data to HDFS6.3 Run7. Output8. References9. Source Code 1. Overview…

Passing Function To Spark

Passing Function to Spark

Table of Contents1. Overview2. Development environment3.Problem Statement4 Project Structure5. Solution5.1 Loading the External Dataset5.2 Separate the Adult and Minors for counting5.2.1 Passing Function to Spark5.2.2 Create Paired RDD in Spark…