XEN, Open VZ or KVM, Which one is best solution for VPS?

Jason Chan

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Hi folks,

Does anyone give me any comparisons between XEN, Open VZ or KVM?
Which one is best solution for VPS?
These really are strange to me, please give some explanations

thanks in advanced
 

Hassan

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OpenVZ is container-based virtualisation platform for Linux. OpenVZ provides users with speed and scalability. It is the most popular. Virtuozzo is similar to OpenVZ. OpenVZ gets a bad name for stability sometimes.

Xen is a secure, high-performance virtual machine monitor (VMM). Xen can securely execute multiple virtual machines, each running its own OS on a single physical system. Shortly, with XEN you will get what you pay for.

KVM is a full hardware virtualisation platform with loadable kernel modules, allowing users to run a range of Linux distros with any kernel. Each virtual machine has private virtualised hardware including network card, disk and graphics adapter. Shortly, with KVM you will get guaranteed resources!
 

ElixantTechnology

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OpenVZ/Virtuozzo is an excellent platform for most websites that you'd be using the VPS for, as it provides a lot of speed and flexibility. OpenVZ provides fast deployment, quick reboots/reinstalls and can be optimized at the host-level. OpenVZ/Virtuozzo are considered to be "Virtual Private Servers" as they are Containers.

Xen is primarily a paravirtualized environment. Very secure, very powerful and one of the primary virtualization platforms used in most cloud environments. Unless you're looking to run a large-scale dedicated environment, Xen might not be the best choice for you. However, if you're looking to have more control over your environment, it is the best choice. Xen is very difficult to overcommit at the host node, so you don't have to worry about the server being oversold.

KVM is a Hardware Virtualized Environment (HVM), and though I don't have too much experience with the platform, I have heard mixed reviews. KVM utilizes an almost a decade old method of virtualization, and there have been some issues as of lately with security as it hasn't been as widely adopted and there is less of a development community behind it. KVM can overcommit the same as OpenVZ can utilizing ballooning technology, meaning that if one VPS on the server is using more resources than the others, it will take the unused resources and push them to that one VPS while pushing idle VPS memory into the SWAP.
 

Euservr

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If you have less budget then go with OpenVz.
If your budget little high and you want dedicated resources then go with KVM/Xen.

OpenVz is mostly use for Overselling.
 

gigapros

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From sales point, OpenVZ is good because you can oversell it.
From stability point, XEN/KVM is good due to better host/guest OS isolation. (this does NOT mean OpenVZ is unstable!)
 
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