Hello everyone, I´m new to the list and I´m doing some research on all virtualization products and solutions avaiable, and I have two questions about Xen: - Does it use have memory overcommitment techniques (ballooning, TMPS, swapping)? - Does it do software thin provisioning? - I read it has a very strong point when using paravirtualization with Linux systems. Does it have any other kind of virtualization method, like full? For now that´s it. I thank you a lot for the attention. Henrique Cicuto Machado _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Fajar A. Nugraha
2009-Dec-11 22:27 UTC
Re: [Xen-users] New to the community - a few questions
On Sat, Dec 12, 2009 at 3:47 AM, Henrique Machado <henrique.cicuto@gmail.com> wrote:> Hello everyone, > > I´m new to the list and I´m doing some research on all virtualization > products and solutions avaiable, and I have two questions about Xen:You listed three, not two :)> - Does it use have memory overcommitment techniques (ballooning, TMPS, > swapping)?Kinda. The general answer would be NO. However, with the help of userland program running on PV domUs, you could implement dynamic ballooning so it would achieve the effect of memory overcommit (http://blog.xen.org/index.php/2008/08/27/xen-33-feature-memory-overcommit/)> - Does it do software thin provisioning?Somewhat. I''d say it''s not really xen-specific though. Examples: - using sparse-file as domU storage - using snapshot/clone feature of underlying storage (LVM, zfs, etc.)> - I read it has a very strong point when using paravirtualization with > Linux systems. Does it have any other kind of virtualization method, > like full?Yes. You need hardware that supports that as well though. Also, for acceptable performance in full virtualization (HVM), you''d need to install PV drivers (usually called "guest additions" in other virtualization technology). -- Fajar _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users