Netflix's Secret Streaming Boost: Mapping India's Hidden Cache Network

TL;DR - Netflix embeds caches (Open Connect Appliances) in Internet Service Provider (ISP) networks to store popular content locally. This reduces latency by serving streams directly from the ISP, avoiding long-distance internet transit. It improves streaming quality, cuts bandwidth costs for both parties (settlement-free), and handles high traffic efficiently—benefiting users with faster, more reliable viewing. Over 1,000 ISPs partner for this.

Sounds interesting? Read on...

In the fast-paced world of online streaming, where every second of buffering can feel like an eternity, Netflix has been quietly building an invisible empire of data caches across India. A recent tweet by tech journalist Aroon Deep (@AroonDeep) has pulled back the curtain on this network, revealing how many of these specialized servers—known as Open Connect Appliances (OCAs)—are embedded directly into local Internet Service Providers (ISPs) in major cities. 

This setup isn't just tech jargon; it's the backbone that ensures your binge-watching sessions are smooth and lag-free. But what exactly are these caches, and why do they matter? Let's dive in. 

Understanding Netflix's Open Connect Program

Around 2013 – 2014, major US ISPs (like Comcast and Verizon) effectively required Netflix to pay direct interconnection fees for smoother delivery of its high - bandwidth video traffic, after congestion issues slowed streaming for customers. Netflix publicly criticized these as " tolls " that violated net neutrality principles but paid to protect user experience. This was about paid peering / interconnection deals rather than a direct profit / percentage share, though telcos sought compensation for handling massive Netflix traffic volumes. Netflix later built its Open Connect CDN (placing servers inside ISP networks) to improve delivery and reduce reliance on such payments. 

Netflix's Open Connect is a content delivery network (CDN) initiative designed to optimize streaming quality by placing servers closer to users. 

Launched to handle the massive data demands of high-definition video, it partners with ISPs worldwide to embed OCAs directly into their networks. These appliances store popular content locally, reducing the need to fetch data from distant servers and minimizing latency. The program operates on two pillars: embedded appliances and settlement-free interconnection (SFI). ISPs get these OCAs for free if they qualify, and in return, they enjoy reduced transit costs and less network congestion. 

This avoids relying on third-party CDNs like Akamai, reducing costs and latency through partnerships.

For instance, Netflix provides and manages the cache servers (their Open Connect hardware) placed inside Jio's network. Jio hosts them, but Netflix handles the data, updates, and operations. It's a partnership for better performance, not Jio acting as a full data center.  

Netflix uses AWS extensively for computing, databases, and more—it's their primary cloud provider since 2016. However, for content delivery, they built Open Connect (their own CDN) to optimize costs, reduce latency, and handle massive video traffic directly via ISP partnerships. AWS fits their needs better for non-CDN tasks. This hybrid approach saves billions in bandwidth.

For viewers, this translates to faster load times and fewer interruptions—especially during peak hours when everyone’s streaming the latest hit series. Globally, Netflix has deployed OCAs in over 60 data centers and partners with more than a thousand ISPs. 

In India, while official details on embedded deployments are sparse, Netflix maintains peering facilities in key cities like Delhi, Mumbai, and Chennai through exchanges such as DE-CIX¹ and Extreme IX². 

These central hubs complement the embedded caches, providing redundancy and efficient content distribution.

Cities with more OCAs benefit from localized content delivery, which cuts down on data travel time and reduces buffering. 

In a country where internet speeds vary wildly, this setup helps bridge the gap, especially in urban areas with high subscriber density.

The Future of Streaming Infrastructure

Netflix's Open Connect caches are proactively updated with popular content based on usage patterns and predictions, typically via nightly fills over peering connections. Less popular content may involve on-demand steering to other caches or origins on misses, but it's not purely auto-updated on first access—it's optimized to minimize that.

As 5G rolls out and data consumption skyrockets, expect more caches to pop up, potentially evening the playing field.

1. DE-CIX (Deutsche Commercial Internet Exchange) is a leading global operator of carrier- and data-center-neutral Internet exchanges, enabling efficient interconnection and traffic exchange worldwide.

2. Extreme IX is a carrier neutral, data centre neutral internet exchange point for Indian ISPs, local and international content providers, with nearly 200 leading ISPs as its customers.