Big Data: Survey, Technologies, Opportunities, and Challenges

Table 1

Rapid growth of unstructured data.

Source	Production
YouTube [15]	(i) Users upload 100 hours of new videos per minute; (ii) Each month, more than 1 billion unique users access YouTube; (iii) Over 6 billion hours of video are watched each month, which corresponds to almost an hour for every person on Earth. This figure is 50% higher than that generated in the previous year
Facebook [16]	(i) Every minute, 34,722 Likes are registered; (ii) 100 terabytes (TB) of data are uploaded daily; (iii) Currently, the site has 1.4 billion users; (iv) The site has been translated into 70 languages
Twitter [17]	(i) The site has over 645 million users; (ii) The site generates 175 million tweets per day
Foursquare [18]	(i) This site is used by 45 million people worldwide; (ii) This site gets over 5 billion check-ins per day; (iii) Every minute, 571 new websites are launched
Google+ [19]	1 billion accounts have been created
Google [20]	The site gets over 2 million search queries per minute; Every day, 25 petabytes (PB) are processed
Apple [20]	Approximately 47,000 applications are downloaded per minute
Brands [20]	More than 34,000 Likes are registered per minute
Tumblr [20]	Blog owners publish 27,000 new posts per minute
Instagram [20]	Users share 40 million photos per day
Flickr [20]	Users upload 3,125 new photos per minute
LinkedIn [20]	2.1 million groups have been created
WordPress [20]	Bloggers publish near 350 new blogs per minute