On Thu, Feb 3, 2011 at 10:38 PM, Phil Meyer <[email protected]> wrote:
> On 02/03/2011 09:00 AM, carlopmart wrote: > >> Hi all, >> >> Which is the minmal amount of RAM needed for a RHEL6 KVM host?? I read >> RedHat's docs about this, and it seems 2GB ... Really?? >> >> Is it possible to limit RAM used by the KVM host as a Xen does?? >> >> Thanks. >> > > Xen dom0 is a tiny, raw hypervisor using bits of the Linux kernel to > operate hardware. > > KVM is a kernel module based hypervisor. Thus it uses the full kernel and > OS with all that implies. > > VMs utilizing the KVM hypervisor run as applications in the host > application space. This is totally different than Xen. > > It has great advantages, and a few disadvantages. > > Using KVM, you have to think of the VMs as fixed sized applications. > > Want to run 2 4GB KVM VMs? The host needs to have more than 8GB available > to it in order to dedicate RAM to the VMs as well as manage its own > resources. > > but i have given 3GB for my VM where the base system has 2GB of RAM. i was just testing not for production. Base OS is Fedora 14 and Guest is RHEL6 > I am bending the specifics slightly to make the point that KVM based VMs > run on top of a full kernel/OS, and that KVM VMs are treated as applications > within that space. > > Hope this helps. > > Good Luck! > > > _______________________________________________ > rhelv6-list mailing list > [email protected] > https://www.redhat.com/mailman/listinfo/rhelv6-list > -- Danishka Navin http://danishkanavin.blogspot.com http://twitter.com/danishkanavin http://identi.ca/danishka
_______________________________________________ rhelv6-list mailing list [email protected] https://www.redhat.com/mailman/listinfo/rhelv6-list
