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

Last updated on MARCH 12, 2014

Applies to:

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

Purpose

<p >*Purpose
<span >Explain to the reader the purpose of the FAQ. Enter a clear description of what the questions and answers are trying to achieve. Be precise. It is this section that will guide the reader to decide whether the document is applicable.

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
Purpose
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?
References

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