KVM or XEN or OpenVZ?

DiggDigital

What's your favorite among KVM or XEN or OpenVZ?

DETio

Cloud is a misused term in this case as you mentioned 3 Hypervisors and 1 Type of Hosting.

Cloud relies on KVM/XEN/OpenVZ - but Cloud enables additional functionality to the user, these includes:

These essential characteristics, as defined by the US Government include:

On-demand self-service :
The user can access, delete instances, or add new instances on-demand as required.

Hourly Billing allows the above to be possible, where-as monthly billing strips that on-demand availability away since you can no longer downscale when required (must wait till the month is over).

Broad network access :
Able to access the service remotely.

Resource pooling :
Virtual resources dynamically assigned and reassigned according to consumer demand. A multi-tenant model where multiple users can utilize this resource pool is required.

Rapid elasticity :
Capabilities can be elastically provisioned and released, in some cases automatically. There must always be idle computing power ready to be used by the consumer - and scaled on demand by the provider, the user must not wait for resources.

Measured service :
Monitoring & Transparency of usage is a requirement, the user must be able to monitor required services such as Bandwidth, Storage, etc.

Other functionality that generally comes (but not essential) with Cloud is redundancy, high availability - other service models which extends IaaS (essential) include PaaS/SaaS/STaaS.

In regards to your question, which can be titled as 'What Hypervisor do you prefer', generally KVM is the most mature hypervisor and is trusted by the largest organizations, for example Google Cloud Platform uses KVM.

OpenStack released some cool statistics about their platform, and more than 80% of their Users in Production use KVM instead of the other hypervisors.

OpenVZ/XEN nonetheless are also very powerful and have their own strengths and weaknesses in comparison to KVM.

WebProject

use a cloud with unlimited storage and resources ;-)

Kvmba_

KVM

24x7servermanagement

I think, its just the matter of preference but it also depends on what type of applications you want to host on VPS, how much will be utilization etc.

I've worked on all three (OpenVZ, XEN and KVM) technologies and they have their own pros and cons.

But, as you've specifically asked about XEN or KVM then I would recommend you to go with KVM due to its architecture, provide isolation and resources are dedicated to it.

Its bit complex but with appropriate optimization of VPS and installation drivers, KVM would work great.

I hope it helps.

randvegeta

HyperV?

KenobisVPS

KVM