A recent report titled How Much Information? 2010 Enterprise Server Information written by several UC – San Diego academics says that in 2008 the world’s servers processed 9.57 zettabytes (zettabyte = 10 to the power of 21), or 9,570,000,000,000,000,000,000 bytes.
A couple of analogies from Physorg illustrate these amounts:
* 9.57 zettabytes is equivalent of a 5.6-billion-mile-high stack of books from Earth to Neptune and back to Earth, repeated about 20 times a year.
* By 2024 the world’s enterprise servers will annually process the digital equivalent of a stack of books extending more than 4.37 light-years to Alpha Centauri, our closest neighboring star system.
This is 12GB of information daily per worker, or 3TB per year. Another study showed that American households consumed 3.6 zettabytes of information in 2008, or around 10TB per individual. (Note that not all of the 3.18 billion workers covered in this study work in information-intensive industries or countries.)
Of course this information is now well out of date. The study showed that server performance doubled every two years, with most of the performance improvement coming from low-end servers, though that doesn’t mean that information processing increases at that pace.
However what is interesting is that this study, in contrast to a number of other prominent studies on the amount of information in the world, focuses on flows of information rather than storage. This is in many ways a more interesting statistic.