Global Cloud Index Projects Cloud Traffic to Represent 95 Percent of Total Data Center Traffic by 2021


Cloud Service Adoption Creates New Data Center Demands


SAN JOSE, Calif., Feb. 05, 2018 (GLOBE NEWSWIRE) -- Today, Cisco released the seventh annual Cisco® Global Cloud Index (2016-2021). The updated report focuses on data center virtualization and cloud computing, which have become fundamental elements in transforming how many business and consumer network services are delivered.

According to the study, both consumer and business applications are contributing to the growing dominance of cloud services over the Internet. For consumers, streaming video, social networking, and Internet search are among the most popular cloud applications. For business users, enterprise resource planning (ERP), collaboration, analytics, and other digital enterprise applications represent leading growth areas.

Strong Multicloud Traffic Growth Projected

Driven by surging cloud applications, data center traffic is growing fast. The study forecasts global cloud data center traffic to reach 19.5 zettabytes (ZB) per year by 2021, up from 6.0 ZB per year in 2016 (3.3-fold growth or a 27 percent compound annual growth rate [CAGR] from 2016 to 2021). Globally, cloud data center traffic will represent 95 percent of total data center traffic by 2021, compared to 88 percent in 2016.

Improved Security and IoT Fuel Cloud Growth

In the past, security concerns have been a major barrier to cloud adoption. Improvements in data center governance and data control have helped to minimize enterprise risk and better protect consumer information. Security innovations coupled with tangible cloud computing benefits, including scalability and economies of scale, play key roles in fueling the cloud growth projected in the study. Additionally, the growth of Internet of Things (IoT) applications such as smart cars, smart cities, connected health and digital utilities requires scalable computing and storage solutions to accommodate new and expanding data center demands. By 2021, Cisco expects IoT connections to reach 13.7 billion, up from 5.8 billion in 2016.

Hyperscale Data Centers Doubling

The increasing need for data center and cloud resources has led to the development of large-scale public cloud data centers called hyperscale data centers. In this year's forecast, it is expected that by 2021 there will be 628 hyperscale data centers globally, compared to 338 in 2016, 1.9-fold growth or near doubling over the forecast period. By 2021, hyperscale data centers will support:

  • 53 percent of all data center servers (27 percent in 2016)
  • 69 percent of all data center processing power (41 percent in 2016)
  • 65 percent of all data stored in data centers (51 percent in 2016)
  • 55 percent of all data center traffic (39 percent in 2016)

"Data center application growth is clearly exploding in this new multicloud world. This projected growth will require new innovations especially in the areas of public, private and hybrid clouds," said Kip Compton, Vice President of Cisco's Cloud Platform and Solutions Group.

Global Cloud Index Highlights and Key Projections:

1.  Data center virtualization and cloud computing growth 

  • By 2021, 94 percent of workloads and compute instances will be processed by cloud data centers; 6 percent will be processed by traditional data centers. 
  • Overall data center workloads and compute instances will more than double (2.3-fold) from 2016 to 2021; however, cloud workloads and compute instances will nearly triple (2.7-fold) over the same period.
  • The workload and compute instance density for cloud data centers was 8.8 in 2016 and will grow to 13.2 by 2021. Comparatively, for traditional data centers, workload and compute instance density was 2.4 in 2016 and will grow to 3.8 by 2021.

 2.  Growth in stored data fueled by big data and IoT

  • Globally, the data stored in data centers will nearly quintuple by 2021 to reach 1.3 ZB by 2021, up 4.6-fold (a CAGR of 36%) from 286 EB in 2016.
  • Big data will reach 403 exabytes (EB) by 2021, up almost 8-fold from 25 EB in 2016. Big data will represent 30 percent of data stored in data centers by 2021, up from 18 percent in 2016.
  • The amount of data stored on devices will be 4.5 times higher than data stored in data centers, at 5.9 ZB by 2021.
  • Driven largely by IoT, the total amount of data created (and not necessarily stored) by any device will reach 847 ZB per year by 2021, up from 218 ZB per year in 2016. Data created is two orders of magnitude higher than data stored. 

 3.  Applications contribute to rise of global data center traffic

  • By 2021, big data will account for 20 percent (2.5 ZB annual, 209 EB monthly) of traffic within data centers, compared to 12 percent (593 EB annual, 49 EB monthly) in 2016.
  • By 2021, video streaming will account for 10 percent of traffic within data centers, compared to 9 percent in 2016.
  • By 2021, video will account for 85 percent of traffic from data centers to end users, compared to 78 percent in 2016.
  • By 2021, search will account for 20 percent of traffic within data centers by 2021, compared to 28 percent in 2016.
  • By 2021, social networking will account for 22 percent of traffic within data centers, compared to 20 percent in 2016.

 4.  SaaS most popular cloud service model through 2021

  • By 2021, 75 percent (402 million) of the total cloud workloads and compute instances will be SaaS workloads and compute instances, up from 71 percent (141 million) in 2016. (23% CAGR from 2016 to 2021).
  • By 2021, 16 percent (85 million) of the total cloud workloads and compute instances will be IaaS workloads and compute instances, down from 21 percent (42 million) in 2016. (15% CAGR from 2016 to 2021).
  • By 2021, 9 percent (46 million) of the total cloud workloads and compute instances will be PaaS workloads and compute instances, up from 8% (16 million) in 2016. (23% CAGR from 2016 to 2021).

For the purposes of the study, cloud computing includes platforms that enable ubiquitous, on-demand network access to a shared pool of configurable computing resources (e.g., networks, servers, storage, applications, and services) that can be rapidly provisioned and released with minimal management effort or service provider interaction. Deployment models include private, public, and hybrid clouds.  Cloud data centers can be operated by service providers as well as private enterprises.

Index Overview:
The Cisco® Global Cloud Index (2016-2021) was developed to estimate global data center and cloud-based traffic growth and trends. The report serves as a complementary resource to existing Internet Protocol (IP) network traffic studies such as the Cisco Visual Networking Index(TM), providing new insights and visibility into emerging trends affecting data centers and cloud architectures. The forecast becomes increasingly important as the network and data center become more intrinsically linked in offering cloud services.

Embedded Infographic:
View our infographic: Growth in the Cloud.

Supporting Resources:
Visit the Cisco Global Cloud Index webpage.
Read the Cisco Global Cloud Index, Forecast and Methodology, 2016-2021 White Paper.
Explore the Cisco Global Cloud Index Highlights Tool.

Editor's Note:
Cisco welcomes analysts, bloggers, media, regulators, service providers and other interested parties to use Cisco's research with proper attribution: "Source: Cisco Global Cloud Index."

Cisco (NASDAQ:CSCO) is the worldwide technology leader that has been making the Internet work since 1984. Our people, products, and partners help society securely connect and seize tomorrow's digital opportunity today. Discover more at and follow us on Twitter at @Cisco.

Cisco and the Cisco logo are trademarks or registered trademarks of Cisco and/or its affiliates in the U.S. and other countries. A listing of Cisco's trademarks can be found at Third-party trademarks mentioned are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company.

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This announcement is distributed by Nasdaq Corporate Solutions on behalf of Nasdaq Corporate Solutions clients.
The issuer of this announcement warrants that they are solely responsible for the content, accuracy and originality of the information contained therein.
Source: Cisco via Globenewswire




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