In today's date all large size companies have huge amount and data and growing day by day
e.g. Facebook, Youtube, Twitter etc have generated in data over Petabytes
Hence Limitation have occured in Conventional Storage Systems including Well Know Databases like Oracle, DB2 etc. Again faster processing of such a large data is an issue
This is Scenario Where Bigdata technologies like Hadoop comes into picture
Hadoop provides many modules to quickly save and retrieve with security without data losage and its FREE !