- Why does video streaming need a dedicated server instead of basic hosting
- What tasks does a dedicated server solve in streaming
- What to pay attention to when choosing a server
- How to organize stream storage without overloading the server
- How to choose a server for different streaming tasks
Video streaming is one of the most demanding formats for working with content. Everything happens in real time: the video needs to be processed, encoded, transmitted, and delivered to the viewer without delays. Therefore, any instability is not just "loading a bit longer," but freezing of the broadcast, loss of audience, and, in the case of business, direct financial losses.
For most websites, the load on the channel varies depending on the number of visitors and usually does not use the full bandwidth of the server. In streaming, the situation is different: during a broadcast, the server must continuously transmit large amounts of data to a large number of viewers simultaneously. For example, if you have a Full HD broadcast with a bitrate of 5 Mbps and 100 people are watching it simultaneously, the server must stably deliver about 500 Mbps. And this is without accounting for reserve, peaks, and additional processes such as recording or transcoding video.
That is why regular website hosting does not work for such tasks. In a shared environment, resources are divided among many users, and the limitations on CPU, memory, and network are quite strict. As a result, even moderate load can lead to throttling or complete halting of processes.
Why does video streaming need a dedicated server instead of basic hosting
In streaming, the main thing is continuous processing and transmission of the video stream. In such conditions, basic hosting solutions quickly hit limitations.
Shared hosting is designed for typical websites and involves shared use of server resources. Even if the formal limits are not exceeded, the system may lower the priority of processes or limit load to ensure stability for all clients. For streaming, this means a risk of instability: delays, stream interruptions, or complete cessation of broadcasting during peak loads.
VPS (Virtual Private Server) is a more flexible option. It provides a guaranteed portion of resources and allows the installation of necessary software. For small tasks, such as internal broadcasts or test projects, a VPS server may be a sufficient solution. However, as the load increases, its capabilities are limited—both in terms of CPU performance and network bandwidth.
That is why dedicated servers are usually used for business-level video streaming. They provide full control over resources, stable performance, and the ability to scale infrastructure according to load.
What tasks does a dedicated server solve in streaming
To correctly select a server, it is important to understand not only its characteristics but also what specific tasks it performs during the broadcast process. In streaming, the server is not just a resource with CPU and memory, but a working tool that simultaneously processes, transmits, and stores video content.
- Real-time video processing. During the broadcast, the video goes through encoding or transcoding stages (for example, to different qualities for different devices). This creates a constant load on the CPU. The higher the video quality and the more stream variants, the more resources are needed. For example, broadcasting in Full HD with parallel generation of several qualities (1080p, 720p, 480p) significantly increases the load on the server.
- Distributing the stream to viewers. After processing the video, the server must reliably deliver it to each viewer. This is not only a matter of performance but also of network bandwidth. The same stream is effectively multiplied by the number of connected users, so even a relatively small audience creates a significant load on the channel.
- Storing broadcast recordings. In many projects, streams are not only broadcasted but also recorded for later viewing. This means constant data recording to disk during the broadcast and subsequent work with files: processing, cutting, or re-publishing. The speed of the disk system determines how smoothly this process will occur without affecting the broadcast itself.
A dedicated server in streaming performs several roles at once—processor, transmitter, and data storage.
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What to pay attention to when choosing a server
The choice of dedicated server for rent for streaming starts with understanding the load it needs to withstand. The number of viewers, video quality, and the presence of transcoding form these requirements, and the appropriate server configuration is selected accordingly.
CPU power
The main load in video streaming comes from video processing, particularly transcoding. Here, it is important not just to think "the more powerful, the better," but how well the CPU matches the specific usage scenario.
You can orient yourself to typical scenarios:
- One stream without transcoding (for example, a direct stream from OBS) — 4–6 cores (Intel Xeon E or Ryzen 5 level) is sufficient, as the server mainly transmits the ready video stream.
- One stream with several qualities (1080p → 720p, 480p) — optimally 6–8 cores with high frequency (3.5+ GHz), such as Xeon E-23xx or Ryzen 7.
- Multiple streams or constant transcoding under load — from 8–16 cores and more (Intel Xeon Gold or AMD EPYC server lines).
It is important to consider that transcoding scales almost linearly: each additional stream or quality directly increases the load on the CPU. Therefore, it is better to select the configuration with a reserve, especially if audience growth or expansion of broadcast functionality is planned.
Amount of RAM
RAM in streaming is responsible for buffering video streams, running streaming software, and system stability under load. Its shortage rarely manifests immediately but leads to a buildup of problems: delays, freezes, and unstable service operation during the broadcast.
The amount of RAM should also be selected according to the scenario:
- One stream without transcoding — 8 GB is sufficient if the server only transmits the stream.
- One stream with transcoding to several qualities — optimally 16 GB, as the load from buffers and processing processes increases.
- Multiple streams or recording broadcasts — from 32 GB and more, especially if additional services (processing, analytics, CDN nodes) are running in parallel.
It is important to consider that memory is used not only for video but also for caching, operating system operation, and background processes. Therefore, a "tight" configuration may work stably only until the first peak load—after that, delays begin, which are difficult to diagnose during the broadcast itself.
Disks: NVMe vs SSD
The disk subsystem in streaming is not always important, but in some cases, it becomes the bottleneck. If the server only transmits the ready stream without recording, the disk requirements are minimal. But as soon as recording of broadcasts, caching, or video processing is added, the speed of the disk begins to affect the stability of operation.
You can orient yourself to the following criteria:
- Without recording (only stream transmission) — a regular SSD is sufficient, as the disk is hardly involved in the process.
- One stream with recording — an SSD with good write speed (from ~500 MB/s) is desirable to avoid delays when saving files.
- Multiple streams or parallel recording and video processing — it is better to choose NVMe right away (from 1500–3000 MB/s and higher) so that the disk does not become a limitation.
It is also important to consider the volume. For example, one hour of Full HD broadcasting can take 2–4 GB depending on the bitrate. If streams are recorded regularly, storage fills up quite quickly, so it is worth allowing for a reserve not only in speed but also in capacity.
Channel and network
The network is the limitation you hit first when the audience grows. The bandwidth determines how many viewers the server can serve simultaneously without losing quality.
The basic logic is simple: number of viewers ≈ bandwidth of the channel / video bitrate.
To approximately assess the capabilities of the server, you can start from the video quality and channel speed.
| Video Quality | Bitrate | Channel | Estimated Number of Viewers |
|---|---|---|---|
| Full HD (1080p) | ~5 Mbps | 1 Gbps | 150–180 |
| Full HD (1080p) | ~5 Mbps | 10 Gbps | 1500–1800 |
| HD (720p) | ~3 Mbps | 1 Gbps | 250–300 |
| SD (480p) | ~1.5 Mbps | 1 Gbps | 500–600 |
These are approximate values, but they clearly show the overall principle: the higher the video quality, the greater the load on the channel, and the fewer viewers the server can serve simultaneously.
It is also important to understand that the channel cannot be used at 100%. If the server is constantly operating at the limit (for example, 900–950 Mbps out of 1 Gbps), any spike in load will lead to buffering or interruptions. Therefore, normal practice is to allow for at least a 20–30% reserve.
Separately, it is worth considering the quality of the data center's network: latency, stability of routes, and bandwidth of external channels.
The nature of the load also depends on the streaming technology and software used on the server. For example, HTTP streaming and WebRTC have different requirements for the network and latency.
Even with sufficient speed, an unstable network can produce the same effect as an overloaded channel—delays and playback stops.
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How to organize stream storage without overloading the server
NVMe disks have already become the standard for projects where there is recording or processing of video. They provide a speed reserve and reduce the risk of the disk becoming a bottleneck under load.
At the same time, it is not always advisable to store all recordings directly on the server. If broadcasts are archived or take up significant space, it is more convenient to move them to a separate file storage. This allows you not to overload the main server and use its resources specifically for processing and transmitting the stream.
For such tasks, you can use StorageBox—a separate disk space from 1 TB, suitable for storing stream recordings, media files, or backups. Files are accessible from anywhere via the internet, and access can be flexibly configured for different users.
This approach divides the load: the server handles streaming, while the storage handles storage. This simplifies scaling and makes the infrastructure more predictable.
How to choose a server for different streaming tasks
To avoid getting lost in configurations, it is more convenient to start from the usage scenario rather than just from the names of processors.
Small broadcasts (up to ~50–100 viewers, without transcoding)
Basic configurations such as Intel Core i7-6700 or i7-7700 with 32–64 GB of RAM and SSD or NVMe disks will suffice. Such a server handles the transmission of the ready video stream without additional processing. This is a good option for internal broadcasts, small events, or test launches.
Medium projects (100–300 viewers or several video qualities)
In this case, a reserve for the CPU is already needed. It is advisable to orient towards configurations of Intel Xeon E3-1275 v5/v6 or Core i7-8700 with 64 GB of RAM and NVMe disks. Such servers are suitable for transcoding video into several qualities, recording broadcasts, and working with multiple streams.
Intensive streaming (300+ viewers, constant load)
For stable operation under load, it is better to choose multi-core solutions, such as Intel Xeon E5-1650v3 or AMD Ryzen 5 3600, with 64–128 GB of RAM and NVMe disks. Such configurations are well-suited for regular broadcasts with transcoding and multiple streams simultaneously.
Large projects and platforms
If it involves multiple streams, thousands of viewers, and a complex infrastructure, powerful servers based on AMD EPYC or Intel Xeon Gold with 128–256 GB of RAM and several NVMe disks are used. In such cases, usually not just one server is deployed, but a system with load distribution among several nodes.
What to consider when choosing a processor
For streaming, not only the number of cores matters but also their frequency. In some cases, processors with fewer cores but higher frequency can perform more efficiently than server CPUs with a larger number of cores but lower performance per core.
In streaming, stability is determined not by individual characteristics but by how the entire infrastructure operates under load. The processor is responsible for video processing, memory for process stability, the disk for recording and storage, and the network for delivering the stream to viewers. If even one of these elements becomes a bottleneck, it immediately affects the quality of the broadcast.
That is why a dedicated server allows avoiding such limitations: it provides predictable performance and the ability to withstand loads without drops even during peak moments.
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