Frequent Asked Questions (Hadoop)




It has been a while since my last post and over that period I have received several questions via comments on my different posts. Almost all of the questions are related to Hadoop and I thought of starting this year with a post just answering those questions. I see readers asking questions that I have already answered several times as […]

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disable browsers vertical and horizontal scrollbars using jquery




disable browsers vertical and horizontal scrollbars using jquery

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Jquery overlay not in full height




hi, this is how we will set the jquery overlay height if you are having issue with Jquery overlay not in full height <code> var docHeight = $(document).height(); var docWidth = $(document).width(); $(“.overlay”).css({ “height”:docHeight, “width”:docWidth }); </code>  

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Hadoop Pig Installation , Pig Configuration in Local and MapReduce Mode




HI All, In this post we will see how we will install pig and run the pig from local or on cluster using mapreduce . To install pig we need to install java first. To get started with pig, we will follow below basic steps: Install Java Install Pig Run the Pig scripts – in Local or Hadoop mode Java […]

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Hadoop mapreduce Reduce Side Join With distributed Cache




HI, today we will see the example on Hadoop mapreduce Reduce Side Join With distributed Cache Now i am writing java code for reduce side join with 3 input files, which i place 1 file in distributed cache to join. Step1: In DeliverFileMapper.java file i am processing the UserDetails.txt file Step2: In DeliverFileMapper.java file i am processing the DeliveryDetails.txt file Step3: […]

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Hadoop map side join with Distributed Cache Example




HI, Welcome all , today i am posting an example for MAP-SIDE JOIN using mapreduce. we will see Hadoop map side join with Distributed Cache below first of all we need to prepare data samples for this map side join Note: we need to remember one thing is that we always put the small file in the distributed cache and […]

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hadoop mapreduce example with partitioner




Hello All, In last class we seen the simple word-count Example.Now we will learn hadoop mapreduce example with partitioner and how to create multiple output files those have the same info i.e. nothing but the data is break down in groups and send them to different reducers and create separate outputs. Input Format: name<tab>age<tab>gender<tab>salary We will use custom partitioning in […]

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My First Hadoop WordCount Example




Hello All, This is my first simple Hadoop wordcount example map reduce program.In map reduce program i am driver,mapper,reducer. in this example i am taking the example string as below “Hi welcome to  Hadoop Examples website Thanks for visiting my website” we need to break the above string into words and count the words “For Example in the above string MY […]

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Welcome to Hadoop Examples




Hi,   i started learning hadoop from past couple months and feels good about learning bigdata. I am not from the java background so feeling little hard for me to catch up the concepts of map reduce programs initially. I started this blog to post all my examples here of what i am learning and these might help some one […]

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