92 Percent of Data Center Traffic will be Cloud by 2020

#Cisco published its sixth annual Global Cloud Index report on November 10, providing a forecast into how cloud is set to evolve in the period from 2015-2020. The big top-line highlight for the report is that Cisco is now forecasting that by 2020, cloud traffic will represent 92 percent of all data center network traffic. In 2015, Cisco's estimates that 3.9 zettabytes (ZB) of cloud traffic transited data centers, accounting for approximately 75 percent of data center traffic. by 2020, Cisco expect data center traffic to grow to 14.1 ZB per year, with cloud representing 92 percent of the traffic. The five-year Compound Annual Growth Rate (CAGR) for cloud traffic is approximately 21 percent. Cloud traffic is also leading to an increase in the number of workloads per physical server, which Cisco categorizes as 'workload density'. For traditional, non-cloud data centers, workload density in 2015 was 2.2, in contrast, cloud data center workload density was 7.3. Looking forward, by 2020, Cisco forecasts that workload density in traditional data centers will grow to 3.5, while cloud data center workload density will grow to 11.9.
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