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Monday, 25 June 2018

Hadoop - Quick Guide

Hadoop - Big Data Overview

“90% of the world’s data was generated in the last few years.”
Due to the advent of new technologies, devices, and communication means like social networking sites, the amount of data produced by mankind is growing rapidly every year. The amount of data produced by us from the beginning of time till 2003 was 5 billion gigabytes. If you pile up the data in the form of disks it may fill an entire football field. The same amount was created in every two days in 2011, and in every ten minutes in 2013. This rate is still growing enormously. Though all this information produced is meaningful and can be useful when processed, it is being neglected.

What is Big Data?

Big Data is a collection of large datasets that cannot be processed using traditional computing techniques. It is not a single technique or a tool, rather it involves many areas of business and technology.

What Comes Under Big Data?

Big data involves the data produced by different devices and applications. Given below are some of the fields that come under the umbrella of Big Data.
  • Black Box Data : It is a component of helicopter, airplanes, and jets, etc. It captures voices of the flight crew, recordings of microphones and earphones, and the performance information of the aircraft.
  • Social Media Data : Social media such as Facebook and Twitter hold information and the views posted by millions of people across the globe.
  • Stock Exchange Data : The stock exchange data holds information about the ‘buy’ and ‘sell’ decisions made on a share of different companies made by the customers.
  • Power Grid Data : The power grid data holds information consumed by a particular node with respect to a base station.
  • Transport Data : Transport data includes model, capacity, distance and availability of a vehicle.
  • Search Engine Data : Search engines retrieve lots of data from different databases.
Big Data
Thus Big Data includes huge volume, high velocity, and extensible variety of data. The data in it will be of three types.
  • Structured data : Relational data.
  • Semi Structured data : XML data.
  • Unstructured data : Word, PDF, Text, Media Logs.

Benefits of Big Data

  • Using the information kept in the social network like Facebook, the marketing agencies are learning about the response for their campaigns, promotions, and other advertising mediums.
  • Using the information in the social media like preferences and product perception of their consumers, product companies and retail organizations are planning their production.
  • Using the data regarding the previous medical history of patients, hospitals are providing better and quick service.

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