KVM vs OpenVZ

KVM vs OpenVZ

When choosing a reliable VPS solution, the question regularly arises, “KVM vs OpenVZ: which virtualization is better for me?” Although there are options like Hyper-V, Xen, and VMware, this dialog is specialized to distinguish between two common types: KVM vs OpenVZ.

Features and Modules of OpenVZ 

OpenVZ has a bunch of features and modules that help out with virtualization. Think of it as different tools in a toolbox but for computers. Let’s check out some of the important things it can do:

Virtualization Containers

OpenVZ’s main thing is these lightweight virtualization containers. They’re like little boxes that keep stuff separate and safe when running apps and services. These boxes ensure everything runs smoothly and quickly, using just the right resources.

Resource Management

OpenVZ helps you manage your computer stuff well. You can control how much your computer thinks (CPU), remembers (memory), saves (disk I/O), and talks to the internet (network). It ensures everyone gets a fair share of these things when using virtual spaces. So, it helps make everything run smoothly and fairly!

Live Migration

This feature allows you to move your online stuff smoothly from one computer to another. It’s like changing where your website lives without anyone noticing. This makes fixing things easier, ensuring everything’s balanced, and upgrading the computer parts without shutting anything down.

High Availability

OpenVZ ensures your business runs smoothly all the time. It uses clever tricks like failover clustering and automatic failover to ensure its service is uninterrupted. This means your business can keep going without unexpected breaks, which is super important!

Monitoring and Reporting

It’s super important to monitor your business’s performance. Some tools in OpenVZ help us see how well everything works, like how much of our stuff we’re using and whether everything is healthy. This allows us to take action before problems pop up and make things run even better.

Security and Isolation

OpenVZ uses really smart ways to keep everything safe. They have special security measures like kernel-level isolation and mandatory access controls. This means they ensure each part of your virtual space stays separate and secure. So, you don’t have to worry about bad stuff getting in and causing problems for your business.

Management Tools

OpenVZ gives you helpful tools to manage your business online. These tools are easy to use and come in two types: ones you can use on a website and others you can use by typing commands. They make setting up and controlling your virtual business space easy, like how you want it to look and work. Plus, you can keep everything running smoothly over time.

Comparing KVM vs OpenVZ

You have read about their features and tools, but you might need more than that to determine which one is right for you. The best way to decide is by comparing OpenVZ vs KVM performance directly.

Hardware Requirements

KVM is like having little virtual computers inside your main computer. But to make these virtual computers work, you need another unique program called a hypervisor. This hypervisor needs some of your computer’s power to run, so not all can access your virtual computers.

Now, OpenVZ takes a different approach. It works alongside your primary computer system instead of needing that extra hypervisor program. This means it hogs less of your computer’s power. Almost all of it can go to your virtual computers!

So, if you want to maximize the power of your computer for your business, OpenVZ might be the solution for you.

OS Support

OpenVZ and KVM are two ways to run different computer systems inside your main computer. OpenVZ mainly works best with various types of Linux systems. But if you want to run something other than Linux, you might encounter some problems. 

On the other hand, KVM can handle both Linux and Windows systems. It’s more flexible because it can work with various systems like Linux, Windows, and others. This makes KVM a good choice for significant businesses that need to use different kinds of computer systems.

Kernel Versions

OpenVZ containers and KVM virtual machines work differently. With OpenVZ, they all use the same basic structure and kernel version. However, with KVM, each virtual machine can have its kernel version, which means it can run different types of software.

This difference gives KVM more flexibility because it can support various operating systems and software versions. On the other hand, because OpenVZ containers share the same kernel, they’re more efficient and don’t require as much power from the central computer.

Memory Distribution

With OpenVZ, memory is shared among containers. If one container doesn’t use all its memory, others can use it instead. However, if one container uses too much memory, it can affect the others. Think of it like sharing toys – sometimes it’s great, but sometimes it causes problems.

On the other hand, KVM gives each virtual machine a set amount of memory. This can make things more stable because each machine has its own space. It’s like giving each child their room – it helps keep things organized and fair.

You can decide how much memory each container or virtual machine gets. With virtual machines, they don’t mess with each other’s memory, which is good for keeping things safe.


OpenVZ and KVM are great options for running your business on a computer. OpenVZ is super speedy because it shares the computer’s central brain (kernel) with other programs. This means it uses resources efficiently and can be fast. However, it may need to help working with specific operating systems and securing things.

On the other hand, KVM keeps everything super safe because each program has its kernel. This means they’re isolated, which is excellent for security. But because of this, things may take more time to happen than with OpenVZ.


Both of these tools are free for anyone to use, which is pretty cool. You can even get them for your computer at home if you use Linux. But if you’re considering using them for a website, there are some things to consider.

KVM can be a bit pricey for hosting providers because it needs more powerful hardware and takes more time to set up. On the other hand, OpenVZ is more straightforward and costs less because it doesn’t need as much fancy equipment.

Most companies that want to save money prefer OpenVZ because it’s easier to manage and doesn’t require as much fancy stuff.

Technical Comparison

Let’s check out the table below to see how these two virtualization technologies compare:

Linux kernel customizationYesNo
Enhanced resource isolationYesNo
Major OS updatesYesNo
Optimal resource utilizationNoYes
Reboot required for upgradesYesNo

VPS/VDS Servers

Let’s get down to some practical stuff. What matters to people when picking out a virtualization for your cloud server?

Can I use Windows?YesNo
Can I host a website?YesYes
Can I run Docker?YesYes, with OpenVZ 7
Can I install a VPN?YesYes
Projects with specific configYesNo
Kernel changesYesNo

We’ve made it easier for you to decide between OpenVZ and KVM.


Linux KVM and Linux OpenVZ are popular virtualization technologies that allow you to run multiple operating systems on a single server. When choosing between OpenVZ and KVM for your business, consider your needs.

If you want something super simple with just one setup, then OpenVZ is perfect for you. But if you want more choices and better control over each part of your setup, go for KVM. After reading this article, you should know precisely which of these two technologies you need based on a use case.


Is OpenVZ better than KVM?

While comparing KVM vs OpenVZ VPS, OpenVZ prides itself on reducing overhead and making maintenance and setup less difficult for new users, especially for Linux users. However, for larger enterprises, gaming programs, and other scenarios requiring a dedicated server environment, KVM proves to be the best wish.

Is OpenVZ a hypervisor?

For the ones venturing into VPS Hosting, OpenVZ is a compelling desire with its fee-effectiveness and simplified control, specifically, tailored for Linux enthusiasts. However, due to its loss of a complete hypervisor overhead, OpenVZ operates with incredible speed and performance. On the other side, KVM shines in scenarios necessitating dedicated server talents, making it a preferred option for companies, gaming communities, and various application needs.

Is KVM VPS good?

KVM VPS tends to be faster than a standard VPS. KVM, being included in Linux, boasts high flexibility and scalability. It leverages a top-tier hypervisor’s abilities, ensuring efficient aid allocation while confronted with high visitor demands.

Why is KVM the best?

KVM gives robust functions such as stay migration, corresponding to VMware’s vMotion, allowing seamless movement of walking VMs across hosts with no downtime. Additionally, KVM supports useful resource overcommitment, permitting allocation of more digital CPU or reminiscence to VMs than the bodily server possesses. These abilities beautify flexibility and efficiency in dealing with virtualized environments.

Is OpenVZ a container?

OpenVZ is a box-primarily based virtualization answer designed especially for Linux structures. It operates with the aid of establishing multiple steady and remoted Linux bins, also called Virtual Environments (VEs) or Virtual Private Servers (VPSs), on a single bodily server. This setup optimizes server usage and stops utility conflicts by retaining strict isolation among packing containers.

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