Understanding KVM vs OpenVZ: Which Virtualization is Best?

What is Virtualization?

Virtualization is the technology that allows one physical server to be split into multiple virtual machines (VPS). However, how that split happens matters.

1. KVM (Kernel-based Virtual Machine)

KVM is true hardware virtualization. Each VPS acts as an independent server with its own kernel.

• Isolated Resources: What you pay for is what you get. No "noisy neighbors" can steal your RAM.
• Custom OS: You can install Windows, custom Linux ISOs, or even BSD.

2. OpenVZ (Container-based)

OpenVZ shares the host server's OS kernel. It is more like a container system (like Docker).

• Burst Resources: You can sometimes use more RAM than allocated, but so can everyone else.
• Overselling: Often used by budget providers to cram too many users on one server.

The AmanaFlow Standard

We use KVM exclusively for our managed and unmanaged VPS offerings. We believe our customers deserve guaranteed performance without the unpredictability of shared kernels.

FAQs

Q: Can I run Docker on a KVM VPS?
A: Yes, perfectly. Since you have your own kernel, you have full control over Docker containers.

Q: Is KVM more expensive than OpenVZ?
A: Generally yes, because resources cannot be oversold. It is an investment in stability.