Big Data as the name implies is a technology which deals with huge amount of data.While learning about big data,the following question arises:

1)What is Big data?
2)What are the sources of such huge amount of data?
3)Why the need arises now for big data technologies?
4)What are the different kinds of Big Data Technologies?

Lets find the answers for these questions:

1) Big Data is a accepted appellation acclimated to call the exponential advance and availability of data, both structured and unstructured. And big Data may be as important to business – and association – as the Internet has become.Big Data is defined on the basis of three Vs:

Volume-Many factors are responsible for huge amounts of data.Data from satellites,social media,GPS navigation system are the major sources of big data.The NY stock exchange generates around one terabytes of data per day.facebook itself generates 10 billion photos and many more.
Velocity-Data is alive in at aberrant acceleration and have to be dealt with in a appropriate manner. RFID tags, sensors and acute metering are active the charge to accord with torrents of data in near-real time. Reacting bound abundant to accord with data acceleration is a claiming for a lot of organizations.
Variety-Data today comes in all types of formats. Structured, numeric data in acceptable databases. Information created from line-of-business applications. Unstructured argument documents, email, video, audio, banal ticker data and banking transactions. Managing, amalgamation and administering altered varieties of data is something abounding organizations still attack with.

2) Any huge amount of data can be as source of big data.Suppose,the pictures and media you take from your phone and put over cloud.Media saved on social web.Data generated from stock markets and many more contribute to the big data.

3) Big data is basically used for analytics.For dealing with such huge amount of data we need big data technologies.For storing huge amount amount of data,insteaf of taking one large machine we can use commodity servers.Many other factors contribute for the need of Big Data technologies which we are going to discuss later.

Various types of big data technologies are as Hadoop,Hbase,Hive,NoSQL etc.Lets take each technology separetely.

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