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Hosting Discussion > Web Hosting Forums > VPS, Dedicated & Colocation Hosting > Which vps is best as adopting OpenVZ, Xen or KVM ?
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  Post #16 (permalink)   02-28-2017, 04:53 AM
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Because of its container based system, OpenVZ VMs can be scaled up or down whilst it's running.
So if your site becomes more popular, you can add CPU cores and memory on the fly, and if your site becomes less popular you can take them away again. (All without downtime)
If you have a reliable host OpenVZ will beat the others on performance.

A quick question to hosts! When you move someone from shared hosting to a VPS, do you have issues with churn?
Do they pay for a managed service, or try and go it alone?
What support ticket increase do you get?
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  Post #17 (permalink)   03-01-2017, 05:11 AM
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I prefer Xen over anything else.

As previously said, Xen provides the stability by being a Premium Service.
KVM is just as HVM, with the difference that in KVM you can oversell RAM. In Xen you can't. (This means that with Xen you pay what you get, that's why it's more expensive).

The question that's driving this market is Price since the new users tend to get the cheapest plans possible.

Since you can oversell RAM in KVM/OpenVZ, the price per GB drops. In OpenVZ this is even more critical, because you can also oversell HDD. This has to do with the arquitecture of each hypervisor.

So, trying to mesh things up:

If you want to have a starter environment where you want to learn how to handle Linux, OpenVZ is your thing! It's cheap, it's simple, it works! Don't expect stability/performance on *very* cheap plans, though. But since it's for learning purposes, I think it's fine.

If you want to be on the same level (starter environment, still linux) and you want/need stability, you should go with Xen PV. This is *almost* the same as OpenVZ, but the resources are dedicated to you.

If you need a full Virtualization but you do not need performance, you should go with KVM (it's cheaper).

If you need full Virtualization, but you need stability, you should go with Xen (more expensive).


In sum, this is my personal opinion:

Stability + Performance = not cheap (Xen)
Cheap + Performance = not stable (OpenVZ)
Stability + Cheap = not performant (KVM)

 
 


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  Post #18 (permalink)   03-01-2017, 03:57 PM
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For hosting VPSs where our customer's servers their customer's data. Like big resellers or agencies, we prefer OpenVZ, because we can expand the resources of the server without downtime. We can even move the VPSs between nodes with less than 5 seconds of downtime.

OpenVZ is perfectly stable if you don't oversell, so don't!

However, there is an alternative to a VPS, that will give you better performance and often for far less money, and that is an "elastic site".

CloudLinux uses an altered version of the OpenVZ kernel, to give you super stable shared hosting where each user is effectively in their own container (especially if you use CageFS).

So why not make accounts that are 2, 4, 6 or 8 cores of CPU and huge amounts of memory.

Now take away that memory required to run an OS, and the space taken for an operating system.

You end up with an efficient and powerful hosting environment, especially if you take into consideration that you'll have all of the infrastructure and toys you get with shared hosting, like automated backups, softaculous, site-builders etc.
The economy of scale means you can have R1Soft and LiteSpeed etc, as you only share the cost of the licensing.

It's like having a managed VPS, only far better value for money!

It's always worth asking what the customer really wants?

Even on Microsoft Azure they've noticed that people don't always want a VPS, just a scalescable solution.
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Last edited by ughosting : 03-01-2017 at 04:01 PM.
 
 
 
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  Post #19 (permalink)   03-27-2017, 03:35 AM
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Xen. We have tested with KVM, but are not getting anywhere near the results we get with Xen. It is improving fast so we are keeping an eye on the developments.

I would not consider openvz, although most of the problems are created by overselling.
 
 
 


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  Post #20 (permalink)   03-29-2017, 07:36 PM
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OpenVZ is easy to sell, and oversell. Though it is tried and tested, albeit a little dated now.

My favorite is definitely KVM, love full isolation. Xen is seemingly losing popularity.
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  Post #21 (permalink)   03-31-2017, 02:11 PM
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I prefer KVM over OVZ and XEN because of its performance..
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  Post #22 (permalink)   06-23-2017, 07:37 PM
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i would recommend KVM
 
 
 


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  Post #23 (permalink)   06-24-2017, 09:38 AM
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Quote:
Originally Posted by SSDHero View Post
I prefer KVM over OVZ and XEN because of its performance..
KVM has good quality and stability than OpenVZ, but really good it's vmware
 
 
 


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  Post #24 (permalink)   06-25-2017, 10:44 PM
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I will always recommend KVM because it can be oversold.
 
 
 
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