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Hadoop The Definitive Guide [Book] - Study Notes

Chap-1- Meet Hadoop Requirement and adoption in yahoo. A framework that can scale to the web. Map and Reduce acitivity and features like data locality. Can be applied with a variety of algorithms Huge data processing can beat good algorithms Chap-2 - MapReduce The Map Java class and Reducer Java class The Job java class Jobtracker and tasktracker Hadoop reduces the input to input splits or just splits Map tasks write the intermediate output to local disks, so that they can be discarded after use. Outputs of Reduce tasks are stored in HDFS Combiner function can be run on map output, and the combiner functions output forms the input to the reduce function Hadoop streaming proivide hadoop apis in languages other than Java Chap-3 - The Hadoop Distributed Filesystem Fault tolerant solution. Same data written at multiple places. Filesystems that manage the storage across a network of machines are called distributed filesystems. Blocks - a block size is the minim...

How to Learn anything in 20 hours with these Time Management Secrets.

A re you a crazy about learning new things? Have your recent lifestyle made you busy all day long and you no longer get to do what you like the most - learning?  Now you spent the precious little time you get after all the busy works on the pursuit of finding new time management secrets that might magically help you find time to do all u ever wanted to do someday. Well, accept it you're never gonna that time-pausing machine.  However, on my search I've found out some interesting resources that could help you make the most of your time.  Josh Kaufman  is the name to remember. I stumbled upon his TED talk video one day, the video gave me some great insights.  How to Learning anything in 20 hours At the end of the video he demonstrates how he learned to play a musical instrument from scratch in 20 hours. That demo play being the end of his 20th hour. And few days after that Ramit Sethi ( author of a bestseller book ) blogge...