What is the difference between KVM and OpenVZ virtualization?

VS

 What is the difference between KVM and OpenVZ? Usually this question arises when a person is looking for a Virtual Private Server, it’s a dilemma, isn’t it? Weighing the pros and cons but one thing that should be kept in mind is that out of these two, there is no clear winner, unlike a boxing match where the one on the floor has “clearly” lost.

Actually it doesn’t work that way at all, at its core the decision comes down to “What is it that you want exactly?”, because both of these are good, it just depends on what your specific needs are. So, lets weigh in our contestants.

Firstly, lets talk in layman’s terms, then we’ll go all technical.

So here we go!

Don’t let the word “Open” in OpenVZ fool you, because normally open means it can work on various systems, but OpenVZ only hosts Linux based operating systems. On the other hand KVM can host Linux, Windows, even custom Operating Systems.

There are two different key points that shines in both of these Virtualizations.

OpenVZ- Allows complete sharing of resources.

OpenVZ has a shared kernel, what does that mean?, well it means that you can have multiple VPSes all running on the same kernel without full blown emulation, i.e., without every single one of those VPSes with their own OS kernels, which results in it performing better. Now there are two types of resources “dedicated” and “burst”. Lets understand that with an example, imagine this, you went to a restaurant with a couple of your very good friends, you all ordered your food, and ofcourse there is bread and water already on the table. The food
that you guys would order is what is classified as dedicated resource, because its yours and no one else would eat it and burst resources are regarded as that bread and water, anyone can use them, they belong to the system. And if don’t eat something and a friend of yours asks for it and you say yes, its called sharing both in real life and in the case of OpenVZ.

KVM- Provides Isolation

KVM is hardware virtualization technology, which means you get to decide how much resource is allocated to what and which application/s. There is no such thing as burst resources only dedicated ones. This means that all of the RAM and disk resources are dedicated to one individual user. KVM provides a more isolated environment and gives users their own kernel. Own kernel means KVM’s potential is pretty much unlimited, with isolated working model it is not limited to just the Linux Kernel, it can run MS Windows and others. Kernel modifications are possible (within limits, ofcourse).

Now for a little technical part.

KVM

Kernel-based Virtual Machine Structures is a Linux kernel virtualization community. KVM CPC allows running multiple virtual servers using Linux or Windows unchanged.

Choosing virtualization KVM , you can buy a virtual server that acts like a dedicated server, thus making a financial economy but benefit from dedicated resources.

Also, you will have absolute control over the isolated environment and the software. Unlike the OpenVZ however, KVM does not allow temporary loan of resources, it has dedicated resources completely isolated.

As main features, KVM has the following:
– Virtualization allows any operating system (Linux, Windows, etc.)
– Native support NFS
– can create swap partitions as dedicated servers
– Allows running in desktop system
– Sets the VPN server
– resources are dedicated

OpenVZ

OpenVZ is a container based virtualization Linux. This container Linux virtualization technology creates multiple secure, isolated on a single physical server. These containers allow better utilization of server and also not allowed to create conflicts between the processes. Each container has the behavior of a normal server with root access, IP addresses, files, reset independently, users, applications and processes.

OpenVZ main features:
– Provides the lowest consumption of resources, low costs
– Resources allocated equally to those who have virtual servers with the same characteristics
– Migration while the virtual server is running without interruption of services
– Upgrade the resources without restarting OS
– Allocation of RAM in case of exceeding allocated resources
– preinstalled OS’s
– online Backup

Summary

Both of these are good at what they do, and what we do is we provide both of these, so decide what you want and head on over to buy what you like.
To get the OpenVZ
https://www.virtono.com/ssd-openvz-vps
Or if you decided to go with KVM
https://www.virtono.com/ssd-kvm-vps