Monday, November 4, 2013
Hadoop Core (HDFS and YARN) Components Explained
It's critical to understand the core components in Hadoop YARN (Yet Another Resource Negotiator) or MapReduce 2.0, and how the component...
Sunday, October 27, 2013
Hadoop FileSystem (HDFS) Tutorial 1
In this tutorial I will show some common commands for HDFS operations. If you don't have Hadoop setup in your linux, you can follow Had...
Monday, October 21, 2013
Setup newest Hadoop 2.x (2.2.0) on Ubuntu
In this tutorial I am going to guide you through setting up hadoop 2.2.0 environment on Ubuntu. Prerequistive $ sudo apt-get install op...
Friday, October 18, 2013
Hadoop WordCount with new map reduce api
There are so many version of WordCount hadoop example flowing around the web. However, a lot of them are using the older version of hadoop a...
Monday, April 15, 2013
Java IO vs NIO
Java NIO (New IO) was introduced in JDK 1.4. While Java IO centralizes around Stream/Reader/Writer and uses decorator pattern as its main de...
Monday, October 15, 2012
Customize Spring JSON output
Spring uses Jackson JSON from http://jackson.codehaus.org/ to serialize an object for json output. To change the default strategy to seriali...
Monday, June 11, 2012
Spring Session Scope Bean
Since HTTP stateless, in a web application, a typical way to keep an user states across multiple requests is through HttpSession. However, d...
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