Streaming video key driver of global cloud data centre market | Online Video | News | Rapid TV News
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Cisco 5Feb2018The seventh annual Cisco Global Cloud Index is projecting that cloud traffic will represent as much as 95% of total data centre traffic by 2021 as applications such as online and over-the-top (OTT) video feed the boom.

The report focuses on data centre virtualisation and cloud computing, which have become fundamental elements in transforming how many business and consumer network services are delivered.

The study forecasts global cloud data centre traffic will likely reach 19.5 zettabytes (ZB) per year by 2021, up from 6.0ZB per year in 2016 - a 3.3-fold growth or a 27% compound annual growth rate (CAGR) from 2016 to 2021. Both consumer and business applications are contributing to the growing dominance of cloud services over the Internet.

For consumers, streaming video was among the most popular cloud applications. Cisco calculated that by 2021, video streaming will account for a tenth of traffic within data centres, compared with 9% in 2016. It added that by 2021, video will account for 85% of traffic from data centres to end users, compared with 78% in 2016.

Looking at workloads and compute instances by application, Cisco estimates that within the consumer segment, video streaming (34% of consumer workloads and compute instances by 2021) and social networking (25% of consumer workloads and compute instances by 2021) will be the two main contributors. At 24% CAGR from 2016 to 2021, video streaming will be the fastest growing applications in terms of workloads and compute instances.

As far as technology that could improve video streams, the Cisco Global Cloud Index noted software-defined networks (SDNs), which separate the control and forwarding of data centre traffic, and network function virtualisation (NFV) which virtualises a variety of network functions, will be key elements. SDN will allow video bitrates to increase, because it can seek out highest bandwidth available, even midstream, instead of lowering the bitrate according the available bandwidth for the duration of the video, as is done currently.
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