Root server vs. vServer: what is the difference?

What the terms really mean

"Root server" and "vServer" are used for all sorts of things in the hosting market, sometimes even for the same product. At FameSystems you have root access on both. The difference lies in the virtualisation underneath.

A root server is a complete virtual machine based on KVM. It brings its own kernel and behaves like a physical computer: its own operating system, its own modules, its own boot process. The hardware underneath is AMD EPYC or AMD Ryzen with NVMe storage, optionally with DDR4 or DDR5, or Intel Xeon with SSD in the entry-level line.

A vServer is an LXC container. It runs on the same Linux kernel as the host system and only isolates processes, file system and network from it. That makes it lean and cheap, but limits what you can change in the kernel.

KVM and LXC compared directly

The table shows the points that make the difference in everyday use. Everything else, such as location, connectivity and DDoS protection, is identical for both variants.

Performance: dedicated means dedicated

A common misconception: the container is "slower" because it shares something. Only the kernel is shared, not the performance. CPU cores, memory and storage are dedicated in both variants at FameSystems and are not oversold.

In practice the container even has a small advantage: it needs no kernel of its own in memory and no boot process of its own. For web servers, databases and bots the difference to the KVM machine is not measurable. Only for workloads that reach deep into the system does the own kernel matter.

When you need the root server

Choose the KVM root server if any of these points applies to you:

• You want to run Windows Server, for example for applications that only run under Windows.
• You need custom kernel modules, a modified kernel or access to kernel parameters that are locked in a container.
• You run Docker or Kubernetes in production and want a clean, complete machine for it.
• You run a game server with many players and want maximum control over the system.
• You want to install an operating system that is not available as a container template.

When the vServer is enough

The LXC vServer is the right choice if you use Linux and need none of the points above. Typical uses:

• Websites and shops with Nginx or Apache, PHP and MySQL or MariaDB.
• Bots for TeamSpeak or Discord, small APIs and automations.
• Monitoring, test and staging systems that are not permanently under load.
• Learning environments and projects where price matters more than the last percentage point of control.

Prices, terms and switching

Both variants run on the FameSystems prepaid model: you top up credit, order, and the server is set up automatically within a few minutes. Price stability applies for the entire term, there are no subsequent increases.

You book upgrades at any time via the customer area. If your project outgrows the vServer, order the root server, move your data and cancel the container. Support will help you with questions about the move.

Our recommendation

If you are unsure, decide by operating system and by Docker: Windows or production Docker, then a KVM root server. Anything else, then an LXC vServer. You save money and lose nothing you would notice in everyday use.