On 03/17/2010 02:15 PM, Hildebrand, Nils, 232 wrote:
Hi,
just two questions:
Is there anything faster than XEN-paravirtualization?
Why XEN 5?
XEN 3 is quite stable, too.
I have 31 DomUs up and running on a single Box - and have a strong feeling that even 60 will run flawless. But: All of them are Para-Virtualized.
I have no problem with disk IO-Bottlenecks since my DomUs are not Database-Servers - so there is mostly static information in the filesystems.
The term "paravirtualization" is becoming quite dated. Even if you install a KVM guest without that option if you choose the virtio driver inside then you still end up with "paravirtualized" I/O. With the advent of things like nested page tables and SR-IOV the "fully virtualized=slow, paravirtualized=way faster" logic is no longer necessarily true at least not for every aspect of the system.
Regards, Dennis
(Disclaimer: So far I'm running all my virtualized servers on Xen but use KVM exclusively at home. Eventually I plan to migrate to KVM on the servers too but at the moment I'm not in a hurry but that is not because i think KVM isn't up for the task but because there is no urgent need to do so.)