Open Connect

Open Connect. It is a globally distributed content delivery network (CDN) operated by Netflix to stream its video and television service directly to internet service providers and consumers. The system is designed to deliver high-quality video efficiently by placing storage servers and caching appliances within the networks of partner ISPs around the world. This decentralized architecture reduces costs, improves streaming performance, and alleviates congestion on the broader internet backbone.

Overview

The platform represents a shift from traditional third-party CDN models to a purpose-built, specialized network for video on demand. By deploying its own servers inside access networks, the service brings popular content physically closer to end-users, which is a core principle of edge computing. This model is central to the streaming strategy of Netflix, allowing it to manage massive amounts of internet traffic associated with its original series and licensed film library. The initiative has been influential in shaping how large-scale streaming services architect their delivery infrastructure.

Architecture and components

The system's architecture consists primarily of Open Connect Appliances (OCAs), which are custom-built hardware servers supplied to participating networks. These appliances store the complete Netflix catalog and serve traffic directly to subscribers. Key components include solid-state drives for storing popular titles and high-capacity hard disk drives for the full library. The software layer utilizes intelligent caching algorithms and integrates with the company's central control plane, known as the Open Connect Control Plane, for managing content placement and traffic routing. This setup often involves partnerships with Internet exchange points (IXPs) for efficient peering.

Deployment and operation

Deployment involves a collaborative process with ISPs and network operators globally, from major companies like Comcast and British Telecom to regional providers. The physical appliances are installed at strategic locations within an ISP's network, such as at data centers or central offices. Operation is largely automated, with the control system handling content updates, load balancing, and real-time analytics. The network is designed to be a free peering partner for ISPs, accepting inbound traffic from the broader internet while delivering the vast majority of data from within the ISP's own network.

Benefits and impact

The primary benefits include significantly improved video quality, reduced latency, and fewer instances of buffering for end-users. For ISPs, it decreases transit costs and reduces strain on their external network links. The impact on the broader internet infrastructure has been substantial, as it pioneered a model where a content provider directly partners with access networks at scale. This approach has been studied by organizations like the Internet Engineering Task Force and has influenced other streaming platforms and the evolution of CDN technologies.

History and development

The project was launched by Netflix in 2012, marking a strategic move away from reliance on commercial CDN providers like Akamai Technologies and Limelight Networks. Its development was driven by the exponential growth of the service's subscriber base and the associated surge in internet traffic. Key figures in its creation included engineers from the company's streaming and infrastructure teams. The program has continuously evolved, with hardware refreshes, software optimizations, and expansion into thousands of locations worldwide, becoming a foundational element of the modern streaming television landscape.

Category:Content delivery networks Category:Netflix Category:Internet architecture