In the second annual Cisco Global Cloud Index (2011-2016), Cisco forecasts global data center traffic to grow fourfold and reach a total of 6.6 zettabytes annually by 2016. The company also predicts global cloud traffic, the fastest-growing component of data center traffic, to grow sixfold – a 44 percent combined annual growth rate (CAGR) – from 683 exabytes of annual traffic in 2011 to 4.3 zettabytes by 2016.
For the period 2011-2016, Cisco forecasts that roughly 76 percent of data center traffic will stay within the data center and will be largely generated by storage, production and development data. An additional 7 percent of data center traffic will be generated between data centers, primarily driven by data replication and software/system updates.
The remaining 17 percent of data center traffic will be fueled by end users accessing clouds for Web surfing, emailing and video streaming.
From a regional perspective, the Cisco Global Cloud Index predicts that through 2016, the Middle East and Africa will have the highest cloud traffic growth rate, while the Asia Pacific region will process the most cloud workloads, followed by North America.