Proxmox and Xen Hypervisor?

[Jason Long]

Hello.
Why Proxmox not have any plan to support Xen Hypervisor?

Thanks.

 

[dcsapak]

what exactly would be the advantages? kvm is very good and widely used.

 

[Jason Long]

what exactly would be the advantages? kvm is very good and widely used.

Then, Why someone using Xen?
KVM is not bare-metal. What is the disadvantage of Xen?

 

[dcsapak]

KVM is not bare-metal.

what do you mean with this? xen is also not 'bare-metal' as all guest functionality has to go through dom0 ?

What is disadvantage of Xen?

more complex to handle for example, and it is not as easy as to replace kvm with xen as simply change a config ...

 

[Jason Long]

what do you mean with this? xen is also not 'bare-metal' as all guest functionality has to go through dom0 ?


more complex to handle for example, and it is not as easy as to replace kvm with xen as simply change a config ...

Are you Kidding?
Can you tell me what "Dom0" in Xen? Why a hypervisor must writes all hardware drivers? Thus, "Xen is bare metal". Please look at https://stackoverflow.com/questions/6100949/xen-bare-metal-hypervisor
Please look at https://xenproject.org/2011/11/29/baremetal-vs-xen-vs-kvm-redux/. KVM is huge because using Linux Kernel.
If you like a Xen without Dom0 then it is ready for you: https://xenbits.xenproject.org/docs/unstable/features/dom0less.html

 

[dcsapak]

If you like a Xen without Dom0 then it is ready for you: https://xenbits.xenproject.org/docs/unstable/features/dom0less.html

ok this may exists, but we would need a dom0 for management anyway?

Please look at https://xenproject.org/2011/11/29/baremetal-vs-xen-vs-kvm-redux/. KVM is huge because using Linux Kernel.

this shows that xen and kvm trades blows in performance
also some other benchmarks show very different results, e.g. https://major.io/2014/06/22/performance-benchmarks-kvm-vs-xen/

but this is not really a matter of performance only the single most important reason is that we already use kvm and switching to xen would be a very hard task and much work for questionable gain

 

[dcsapak]

If you like a Xen without Dom0 then it is ready for you: https://xenbits.xenproject.org/docs/unstable/features/dom0less.html

also please read carefully:

• No PV drivers. There is no support for PV devices at the moment. All devices need to be statically assigned to guests.

which is not really practical as a management layer...

 

[Sralityhe]

If you want xen go for xcp-ng

 

[Jason Long]

also please read carefully:



which is not really practical as a management layer...

I know, but they are working on it.
I'm working with XenServer and XCP-ng, but why Proxmox not thinking about target Xen customers? It is a good feature.

 

[Jason Long]

ok this may exists, but we would need a dom0 for management anyway?

this shows that xen and kvm trades blows in performance
also some other benchmarks show very different results, e.g. https://major.io/2014/06/22/performance-benchmarks-kvm-vs-xen/

but this is not really a matter of performance only the single most important reason is that we already use kvm and switching to xen would be a very hard task and much work for questionable gain

I knew this test but it is old: "xen 4.3.2"

 

[Sralityhe]

but why Proxmox not thinking about target Xen customers? It is a good feature.

but this is not really a matter of performance only the single most important reason is that we already use kvm and switching to xen would be a very hard task and much work for questionable gain

Thats your answer

 

[Jason Long]

Thats your answer

very hard task == More customers

 

[Sralityhe]

Thats just speculation in my opinion. Why would you switch from an allready existing xen managementsoftware to another?
Migrations usually means alot of work too.

 

[Jason Long]

Thats just speculation in my opinion. Why would you switch from an allready existing xen managementsoftware to another?
Migrations usually means alot of work too.

It is the art of products. Different performance, Different GUI and features.