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simonmart on 16 Oct 12The Cisco ® Global Cloud Index is an ongoing effort to forecast the growth of global data center and cloud-based IP traffic. The forecast includes trends associated with data center virtualization and cloud computing. This document presents the details of the study and the methodology behind it. Global data center traffic: ● Annual global data center IP traffic will reach 4.8 zettabytes by the end of 2015. In 2015, global data center IP traffic will reach 402 exabytes per month. ● Global data center IP traffic will increase fourfold over the next 5 years. Overall, data center IP traffic will grow at a compound annual growth rate (CAGR) of 33 percent from 2010 to 2015. Data center virtualization and cloud computing transition: ● The number of workloads per installed traditional server will increase from 1.4 in 2010 to 2.0 in 2015. ● The number of workloads per installed cloud server will increase from 3.5 in 2010 to 7.8 in 2015. ● By 2014, more than 50 percent of all workloads will be processed in the cloud. Global cloud traffic: ● Annual global cloud IP traffic will reach 1.6 zettabytes by the end of 2015. In 2015, global cloud IP traffic will reach 133 exabytes per month. ● Global cloud IP traffic will increase twelvefold over the next 5 years. Overall, cloud IP traffic will grow at a CAGR of 66 percent from 2010 to 2015. ● Global cloud IP traffic will account for more than one-third (34 percent) of total data center traffic by 2015.