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Calculate Average value in WordCount MapReduce on Hadoop In this post I show how to calculate average value of counters in a Java program that runs Map-Reduce over hadoop. The famous example of Word Count that can be found here shows a simple MapReduce that sets counter of words. Here...

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Abstract Enable you to debug the map-reduce process on your local machine by setting up Hadoop in a VM instead of debug through logs in amazon’s EMR Instructions Download cloudera quick start VM follow the instructions here for pre requisite anddownload link. You can choose the VM type (vmware, virtual...

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Hi, I have a working hadoop process. I would like to migrate it to spring framework using spring hadoop. I have a few questions. 1. How does hadoop child procesess instatiate spring application context, Is the xml uploaded to distributed cache? 2. configureReducerTypesIfPossible() at JobFactoryBean is not implemented, how does...

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 Outbrain gave this week a practical talk about Hadoop, by one of their US Ops Engineers. They have an Hadoop cluster for genrating user-facing reports & analytics.   My summary: http://www.mindmeister.com/75831919/hadoop-talk-nathan-milford-outbrain   Slides: http://blog.milford.io/2011/01/slides-and-notes-from-my-recent-hadoop-talk-in-israel/