Global Cloud Index: Traffic to Grow Sixfold by 2016

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 context, 6.6 zettabytes is equivalent to:

• 92 trillion hours of streaming music – Equivalent to about 1.5 years of continuous music streaming for the world's population in 2016.
• 16 trillion hours of business Web conferencing – Equivalent to about 12 hours of daily Web conferencing for the world's workforce in 2016.
• 7 trillion hours of online high-definition (HD) video streaming – Equivalent to about 2.5 hours of daily streamed HD video for the world's population in 2016.

The vast majority of the data center traffic is not caused by end users but by data centers and cloud-computing workloads used in activities that are virtually invisible to individuals.

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.

Overview of the Latest Worldwide Market Study:

• The Cisco Global Cloud Index (2011-2016) was developed to estimate global data center and cloud-based Internet Protocol (IP) traffic growth and trends. The Cisco Global Cloud Index serves as a complementary resource to existing network traffic studies, providing new insights and visibility into emerging trends affecting data centers and cloud architectures. The forecast becomes increasingly important as networks and data centers become more intrinsically linked in offering cloud services.
• The Cisco Global Cloud Index includes a "workload transition" forecast, which shows the workload shifting from traditional data centers to more virtualized cloud servers.
• The forecast also includes a supplement on Cloud Readiness Regional Details, which examines the fixed and mobile network abilities of each global region (from nearly 150 countries) to support business and consumer cloud-computing applications and services.
• The Cisco Global Cloud Index is generated by modeling and analysis of various primary and secondary sources, including 40 terabytes of traffic data sampled from a variety of global data centers over the past year; results from more than 90 million network tests over the past two years; and third-party market research reports. 

"As cloud traffic continues to proliferate in a new world of many clouds, the Cisco Global Cloud Index provides all cloud computing stakeholders with a very valuable barometer to make strategic, long-term planning decisions. This year's forecast confirms that strong growth in data center usage and cloud traffic are global trends, driven by our growing desire to access personal and business content anywhere, on any device. When you couple this growth with projected increases in connected devices and objects, the next-generation Internet will be an essential component to enabling much greater data center virtualization and a new world of interconnected clouds," said Doug Merritt, senior vice president, Corporate Marketing, Cisco Systems.

Five Key Factors Drive the Internet Growth Trajectory

Cisco issued results of their annual Visual Networking Index (VNI) Forecast (2011-2016). It's the company's ongoing initiative to forecast and analyze Internet Protocol (IP) networking growth and trends worldwide. The VNI Forecast update projects the significant amount of IP traffic expected to travel public and private networks -- including Internet, managed IP, and mobile data traffic generated by all users.

This year, Cisco has also developed a new complementary study -- the Cisco VNI Service Adoption Forecast, which includes global and regional residential, consumer mobile, and business services growth rates.

By 2016, annual global IP traffic is forecast to be 1.3 zettabytes -- (a zettabyte is equal to a sextillion bytes, or a trillion gigabytes). The projected increase of global IP traffic between 2015 and 2016 alone is more than 330 exabytes, which is almost equal to the total amount of global IP traffic generated in 2011 (369 exabytes).

This significant level of traffic growth is driven by five key factors:

1. An increasing number of devices: The proliferation of tablets, mobile phones, and other smart devices as well as machine-to-machine (M2M) connections are driving up the demand for connectivity. By 2016, the forecast projects there will be nearly 18.9 billion network connections -- almost 2.5 connections for each person on earth -- compared with 10.3 billion in 2011.
2. More Internet users: By 2016, there are expected to be 3.4 billion Internet users -- about 45 percent of the world's projected population according to United Nations estimates.
3. Faster broadband speeds: The average fixed broadband speed is expected to increase nearly fourfold, from 9 megabits per second (Mbps) in 2011 to 34 Mbps in 2016.
4. More video: By 2016, 1.2 million video minutes -- the equivalent of 833 days (or over two years) -- would travel the Internet every second.
5. Wi-Fi growth: By 2016, over half of the world's Internet traffic is expected to come from Wi-Fi connections.

The Cisco VNI Forecast Methodology

The annual Cisco VNI Forecast was developed to estimate global Internet Protocol traffic growth and trends. Widely used by service providers, regulators, and industry influencers alike, the Cisco VNI Forecast is based on in-depth analysis and modeling of traffic, usage and device data from independent analyst forecasts.

Cisco validates its forecast, inputs and methodology with actual traffic data provided voluntarily by global service providers and more than one million consumers worldwide. The following Cisco VNI Forecast resources and tools are available online:

• The updated Cisco VNI Forecast Highlights Tool provides key forecast predictions in short sound bites that can be chosen on a global, regional or country level (these include device, traffic and network speed projections).
• The Cisco VNI Forecast and Methodology, 2011 – 2016 White Paper provides the full detailed findings of the study.
• The Cisco VNI Forecast widget provides customized views of the growth of various network traffic types around the globe (revised for this 2011 - 2016 forecast period).
• The Cisco VNI Service Adoption Forecast White Paper provides a unique view into global and regional trends of next-generation residential, consumer mobile, and business end-user services and applications, underlying addressable markets and relevant devices and connections.
• The Cisco VNI Service Adoption Forecast Highlights Tool provides primary global and regional takeaways on user and subscriber, device and connection, and service adoption penetration rates.
• The New Cisco Data Meter application (beta version 1.0) for Android smartphones provides users with the following valuable network-related data: estimated and projected bandwidth consumption, individual app usage, Wi-Fi and cell connection speeds, and the location of nearby Wi-Fi networks.

Historically, Cisco VNI projections have generally been viewed as conservative; however, the forecast has proven to be quite accurate throughout its six-year history.

• In the initial 2007 VNI Forecast, Cisco projected an overall IP traffic volume of 28.4 exabytes per month by 2011. The actual volume in 2011 was 30.7 exabytes per month. The actual volume was about 7 percent higher than what Cisco projected five years ago.
• In the 2008 VNI Forecast, Cisco predicted that in 2010 Internet video would surpass P2P in traffic volume. In 2010, Internet video surpassed P2P in traffic volume -- confirming the Cisco VNI Forecast.