--- title: "What Is Auto-Scaling? Definition and Examples | RentAnOTT" description: "Auto-scaling adds and removes server capacity automatically as demand changes. See which parts of a streaming service scale and how live spikes are handled." url: "https://www.rentanott.com/glossary/auto-scaling" markdown_url: "https://www.rentanott.com/glossary/auto-scaling.md" category: "Streaming technology" updated: "2026-10-05" --- # What is auto-scaling? Auto-scaling is the automatic adjustment of computing capacity to match demand. When load rises, more servers are started; when it falls, they are shut down. For a streaming service it is what keeps sign-in, playback and payment working through an evening peak or a live event. ## What scales in a streaming service - Application servers: sign-in, catalog, search and entitlement checks - Playback authorization and DRM license issuing - Payment and checkout - Transcoding workers, which scale with the upload queue - Live transcoding and packaging - Video delivery itself, which is scaled by the CDN, not by your servers ## How it works The system watches indicators such as processor load, request rate or queue length. When one crosses a threshold, it starts more instances and adds them behind a load balancer; when demand subsides, it removes them. Databases and caches scale differently, through replicas and managed services sized with headroom. ## Its limits: the live spike Reactive scaling takes a few minutes to bring new capacity online. A live event can send most of its audience in under that. The answer is to scale ahead of time: raise capacity before a scheduled event, keep it there until the audience has arrived, and let it fall afterward. Any component that does not scale, such as a single database or a third-party payment service with a rate limit, becomes the bottleneck. Load testing before large events finds these. ## Why it matters commercially Without it you either pay all month for capacity you need one evening a week, or you fail on that evening. With it, cost follows demand. On a managed platform, scaling is the vendor's responsibility and is part of what the plan buys. ## Auto-scaling on RentAnOTT RentAnOTT runs on auto-scaling AWS infrastructure with CDN delivery, monitoring, alerting, backups and disaster recovery built in. Scale customers get custom concurrency and can add a dedicated stack. [See reliability features](https://www.rentanott.com/features#security). ## Related terms - [Peak concurrency](https://www.rentanott.com/glossary/peak-concurrency) — Peak concurrency is the highest number of viewers watching a service at the same moment within a period, such as a day, an event or a month. It is the figure that capacity, and many platform plans, are sized against. - [Concurrent viewers](https://www.rentanott.com/glossary/concurrent-viewers) — Concurrent viewers is the number of people watching a service's video at the same moment. The highest value reached, peak concurrency, determines how much streaming capacity the service needs. - [CDN](https://www.rentanott.com/glossary/cdn) — A CDN (content delivery network) is a network of servers spread across many locations that stores copies of content and delivers each request from a server near the viewer. For streaming, it is what carries the video segments from the platform to the audience. - [Managed OTT](https://www.rentanott.com/glossary/managed-ott) — A managed OTT platform, also called OTT SaaS, is streaming software that the vendor hosts, operates and updates on your behalf for a recurring fee. You run the content and the business; the vendor runs the technology. - [SLA](https://www.rentanott.com/glossary/sla) — An SLA (service-level agreement) is the part of a contract in which a vendor commits to measurable levels of service, such as uptime and support response times, and states what the customer receives if those levels are missed. - [Multi-CDN](https://www.rentanott.com/glossary/multi-cdn) — Multi-CDN is the practice of delivering video through two or more content delivery networks at once, with a switching layer that sends each viewer, or each request, to whichever network is performing best for them at that moment. - [Live event](https://www.rentanott.com/glossary/live-event) — A live event is a single scheduled stream with a defined start and end, such as a match, a concert, a conference or a premiere. Unlike a linear channel it does not run continuously, and unlike on-demand video everyone watches it at the same time. - [Self-hosted OTT](https://www.rentanott.com/glossary/self-hosted-ott) — A self-hosted OTT platform is streaming software that you license, usually for a one-time fee and sometimes with source code, and then install and operate on your own cloud account or on-premise servers. - [Transcoding](https://www.rentanott.com/glossary/transcoding) — Transcoding is converting a video from one encoded format into another. On a streaming platform it means taking an uploaded file or a live feed and producing the several resolutions and bitrates needed for adaptive playback on every device. ## Further reading - [Pricing](https://www.rentanott.com/pricing) - [Pay-per-view for IPTV and OTT](https://www.rentanott.com/blogs/iptv-pay-per-view) - [OTT solution guide](https://www.rentanott.com/blogs/ott-solution) ## Frequently asked questions ### Does auto-scaling mean unlimited capacity? No. It means capacity adjusts within limits set by the provider, the configuration and your plan. Very large events still need planning. ### Do I need to configure auto-scaling myself? On a managed platform, no; the vendor operates it. On a self-hosted system it is your team's job to design, test and monitor. ### Should I tell my platform vendor about a big live event? Yes. Advance notice lets capacity be raised before the audience arrives instead of reacting once it does. All 163 terms: [Streaming and OTT glossary](https://www.rentanott.com/glossary). ## Book a demo Tell RentAnOTT what you are launching. The team walks through the platform and maps the path to go-live around your catalog, markets and revenue model. Book a demo: https://www.rentanott.com/contact ## More from RentAnOTT - [Home](https://www.rentanott.com/index.md) — What RentAnOTT is, what every plan includes, and how launch works - [Features](https://www.rentanott.com/features.md) — Every core feature and optional add-on - [Pricing](https://www.rentanott.com/pricing.md) — Platform tiers, apps, add-ons, usage rates and example bills in INR and USD - [Free tools](https://www.rentanott.com/tools.md) — OTT app builder and calculators for streaming revenue, bandwidth, bitrate and pricing - [Insights](https://www.rentanott.com/blogs.md) — All streaming business articles - [Glossary](https://www.rentanott.com/glossary.md) — Definitions of streaming and OTT terms - [Book a demo](https://www.rentanott.com/contact.md) — Talk to RentAnOTT about your launch Full site in one file: https://www.rentanott.com/llms-full.txt