Last night, as the bell rang for one of the most hyped events of the year - Jake Paul vs. Mike Tyson - an unexpected challenger entered the ring: a Netflix outage. The bout between the 27-year-old social media influencer-turned-prizefighter Paul and the 58-year-old former heavyweight champion Tyson was streamed live on Netflix and played out in front of a sold-out crowd at AT&T Stadium in Arlington.
Tens of thousands of viewers were left staring at a spinning wheel, while #NetflixCrash trended on X and Downdetector registered over 500,000 reports of streaming issues.
For a company that has set the gold standard in engineering practices, pioneered chaos engineering, and upholds some of the toughest interview processes in the industry, this outage is a reminder that no system is invincible. The question on everyone’s mind: with all their cutting-edge tech and top-tier talent, should Netflix have done a better job?
If you’re prepping for a system design interview at FAANG, here’s what you should learn from this episode.
Friday night’s bout between Mike Tyson and Jake Paul was Netflix’s biggest live sports event to date - and an opportunity to make sure it can handle audience demand with the NFL and WWE on the horizon. The streaming giant seemed to fail that test.
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The Tyson-Paul fight was available to Netflix’s 280 million subscribers at no additional cost, but Netflix apparently couldn’t handle the massive audience. Users reported streaming and buffering problems throughout the event, which led to a lot of frustration on social media.
This isn’t the first time the platform has faced outages during live or highly anticipated events. In April 2023, Netflix experienced a brief outage during a live stream of the dating reality show “Love is Blind”.
Another said: “Netflix has crashed! We have been buffering at 25% for 10 minutes and are now frozen. It’s not my network. Another commented, “Mine just stopped.
Key Components of On-Demand Streaming
Netflix has long been a pioneer in delivering high-quality, on-demand streaming content to millions of viewers worldwide. Their expertise in serving static content is virtually unparalleled. However, during a recent live event - the highly anticipated big fight Jake Paul vs Mike Tyson - users experienced constant buffering, turning what should have been a seamless viewing experience into a frustrating ordeal. This raises the question: What went wrong, and how can Netflix improve its live-streaming capabilities for future events?
To deliver a smooth experience to millions of users worldwide, on-demand streaming platforms rely on a carefully orchestrated network of technologies. Here’s how it all comes together:
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1. Content Delivery Networks (CDNs): The Backbone of Streaming
At the heart of any streaming service is a CDN - a geographically distributed network of servers designed to deliver content efficiently.
How CDNs Work: When you hit “play,” the CDN routes your request to the nearest server. This minimizes the distance data travels, reducing latency and ensuring fast, high-quality playback.
Why They Matter: Without CDNs, all requests would go to a single data center, creating bottlenecks, slow loading times, and a poor user experience.
Netflix, for instance, uses its proprietary CDN, Open Connect, which caches content at edge servers located closer to users for faster delivery.
2. Caching: The Secret to Instant Playback
Caching is the process of storing copies of data in easily accessible locations, like edge servers in a CDN or even your device.
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- Server-Side Caching: Popular content is preloaded on servers closer to users. For example, during a blockbuster movie release, regional servers will cache the movie to meet the surge in demand.
- Client-Side Caching: Your device may temporarily store a few seconds of video ahead of where you’re watching, ensuring playback remains smooth even if the connection falters briefly.
This proactive approach is what allows Netflix or YouTube to start playing within seconds of your click.
3. Load Balancers: The Traffic Controllers
Imagine millions of people clicking “play” at the same time - how does the system ensure no single server is overwhelmed? Enter the load balancer.
How Load Balancers Work: These systems distribute user requests across multiple servers, preventing overload on any single server.
Why They’re Crucial: Without load balancers, one server could crash from excessive demand, leading to outages. Dynamic load balancing also ensures high availability, automatically redirecting traffic to functioning servers if one goes offline.
4. Adaptive Bitrate Streaming: Perfect Playback for All
One of the most user-facing innovations in on-demand streaming is adaptive bitrate streaming.
How It Works: The video file is divided into segments of varying quality (e.g., 1080p, 720p, 480p). Based on your internet speed, the system dynamically adjusts the quality in real time, ensuring uninterrupted playback.
Why It’s Important: It allows users with slower internet connections to enjoy content without buffering, while those with faster speeds can stream in high definition.
5. Encoding and Compression: Making Content Streamable
Before content is ready for streaming, it undergoes encoding and compression to make it suitable for online delivery.
- Encoding: Converts raw video files into digital formats compatible with a wide range of devices.
- Compression: Reduces the file size without sacrificing too much quality, ensuring faster transmission.
Popular codecs like H.264 and H.265 are widely used to strike the perfect balance between quality and size.
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Key Takeaways for Aspiring Engineers and System Designers
The chaos engineering paradox - Netflix didn’t just embrace failure; they celebrated it by inventing chaos engineering. Tools like Chaos Monkey are designed to pull the plug on services at random, forcing systems to adapt and recover. But last night’s event showed that even the most battle-hardened systems can be caught off guard. Lesson for candidates: understand chaos engineering not just as a buzzword but as a philosophy of building with failure in mind.
Scalable architecture beyond ‘expected’ peaks - Netflix is built to scale, handling millions of concurrent streams every day. But, as last night proved, unexpected spikes during high-profile events push the definition of ‘scalable.’ The takeaway? designing systems to scale isn’t enough - you need to plan for super-spikes that occur during viral moments. In interviews, be ready to discuss how you would architect a system that goes beyond just handling ‘normal’ high traffic to absorbing tsunami-like surges.
Distributed systems and redundancy - Multi-region failover? Check. Distributed workloads? Check. Yet, the event highlighted potential pain points even in globally distributed systems. If you’re facing a system design interview, expect questions about redundancy strategies that don’t just look good on paper but work when the world is watching.
Observability that goes deeper - observability is a given, but last night’s crisis reminds us that monitoring needs to be predictive, not just reactive. Early anomaly detection and automated escalation are must-haves for truly resilient systems. In your interview prep, focus on how metrics, tracing, and alerting can drive smarter, real-time decisions before issues explode.
Failover and backup plans - it’s not just about having a backup; it’s about how seamlessly it kicks in when needed. Last night’s situation showed that even Netflix’s famed multi-region architectures might hit snags. For interviews, think through how you’d implement a failover strategy that’s flexible and resilient enough for any scenario.
Traffic management under extreme conditions - last night’s outage is a testament to the importance of smart traffic management. Rate limiting, load shedding, and dynamic scaling policies are essential. The challenge is building an architecture that can throttle demand to protect core functionality without shutting users out. Prepare to explain how you’d approach traffic control in high-stakes situations.
What This Means for Your System Design Interviews
If Netflix - a tech giant known for its talent, budget, and cutting-edge practices - struggles during high-traffic events, interviewers at FAANG and similar companies will expect you to be prepared for the unexpected. Here’s your checklist:
- Master chaos engineering and think beyond theory; understand the ‘what-if’ scenarios.
- Design for hyper-scalability and address traffic patterns that defy projections.
- Implement deep observability and showcase your knowledge on automated detection and response.
- Discuss failover intricacies and go beyond saying “we have backups” - explain how they work under stress.
- Traffic control mastery involves ensuring a seamless experience without crashing under a viral surge.
Ronald “Blue” Denton, a resident of Hillsborough County, Fla., who says he is a Netflix subscriber, sued the company in Florida state court. The lawsuit, filed Monday, seeks unspecified monetary damages and class-action status on behalf of other consumers who were affected. The lawsuit accuses Netflix of breach of contract and deceptive trade practices under Florida law, per WFLA-TV.
According to Denton’s lawsuit, “60 million Americans were hyped to see ‘Iron’ Mike Tyson, ‘The Baddest Man on the Planet’ versus YouTuber-turned-prizefighter Jake Paul.
In April 2023, Netflix hosted its first major live event, a “Love Is Blind” reunion, which was massively delayed because of technical issues - and became available on the platform 19 hours after it was supposed to stream live.