The Definition of Big Data

a. There is no correct anwser of the definition of big data. The following is defined from several enterprises.



Computer World

"Big data is information collected from computer system log file, electronic financial transaction, web searching stream, e-mail meta-data, social networking acitivities and etc."




Mckinsey

"Big data is a data which cannot be earned, saved, managed and analyzed by traditional database software."




Oracle

"Big data includes traditional enterprise data, data created by machine and social data."


Yahoo!

"Big data is unstructured data created by enterprise."




IDC 

"There are no standard which can judge whether it is big data or not. The size of big data is very extensive and it has a variety of structure, so it needs to be managed by a new technique to be acquired very quickly and analyzed. "





b. The difinition of big data devided by 3 aspects