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MapReduce Frequently Asked Questions (FAQ) (Doc ID 1541527.1)

Last updated on SEPTEMBER 13, 2019

Applies to:

Big Data Appliance Integrated Software - Version 2.0.1 and later
Linux x86-64


This document provides answers to frequently asked questions about MapReduce on the Oracle Big Data Appliance(BDA).

Questions and Answers

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In this Document
Questions and Answers
 What exactly is MapReduce?
 Can I write a MapReduce program with any language other than Java?
 Is the MapReduce infrastructure on the BDA open source?
 Since $HADOOP_HOME is deprecated on CDH4.1.2 / BDA V2.0.1 what environment variable should be used?
 What is the impact of shutting down a server for maintenance on MapReduce jobs?
 Can standard R code be translated into MapReduce?
 Will CDH 5 support YARN by default?
 Are there any known issues with CDH4/YARN if it is being used for test purposes only?
 How would MR1 be disabled and MR2 enabled on CDH4?

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