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Cisco study projects cloud computing traffic to grow 12-fold by 2015

In the inaugural Cisco Global Cloud Index (2010 - 2015) issued this week, the company estimates global cloud computing traffic will grow 12-fold from 130 exabytes to reach a total of 1.6 zettabytes annually by 2015, a 66% compound annual growth...


November 30, 2011  


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In the inaugural Cisco Global Cloud Index (2010 – 2015) issued this week, the company estimates global cloud computing traffic will grow 12-fold from 130 exabytes to reach a total of 1.6 zettabytes annually by 2015, a 66% compound annual growth rate (CAGR). One zettabyte is equal to a sextillion bytes or a trillion gigabytes — 1.6 zettabytes is approximately equivalent to:

* 22 trillion hours of streaming music

* 5 trillion hours of business Web conferencing with a webcam

* 1.6 trillion hours of online high-definition (HD) video streaming

According to the index, cloud is the fastest growing component of data centre traffic, which itself will grow 4-fold at a 33% CAGR to reach 4.8 zettabytes annually by 2015.

“The vast majority of the data centre traffic is not caused by end users but by the data centres and clouds themselves undertaking activities that are largely transparent to end users — like backup and replication,” Cisco said in a release.

“By 2015, 76% of data centre traffic will remain within the data centre itself as workloads migrate between various virtual machines and background tasks take place.”