[ale] Memory and virtualization

[Jim Kinney]

That's correct with RHEL/KVM/ovirt. The ballooning must be installed on
each client.


On Fri, Jul 12, 2013 at 9:27 AM, Beddingfield, Allen <allen at ua.edu> wrote:

> Under VMware, you have "transparent page sharing" (
> http://www.virtualizationadmin.com/blogs/lowe/news/what-is-transparent-page-sharing-2-335.html),
> and memory overcommitment with ease.  From Redhat's propaganda, they claim
> to be able to do something similar.  I know that this ONLY works correctly
> on VMware if their tools are running, so I would suspect the same to be
> true of RHEV.  I know  from experience that it is a hard allocation with
> XEN virtualization.
>
>
> Allen Beddingfield
> Systems Engineer
> The University of Alabama
>
> On 7/12/13 7:16 AM, Lightner, Jeff wrote:
> Given that Linux pre-caches/pre-buffers most memory presented to it what
> impact if any does this have to memory allocation to a virtual guest for
> the virtual platform itself?    That is to say if one has a mix of Linux
> and Windows virtual machines on say Hyper-V or MWare does the memory
> allocated to each Linux guest become totally unavailable to other guest
> machines because of this pre-allocation or is oversubscription possible
> without impacting the guest machines?
>
> P.S. Don’t tell me not to use Hyper-V unless you can provide documentation
> it absolutely won’t work for RHELinux guests – I didn’t make the choice and
> won’t be able to undo it    My question is NOT asking which virtualization
> platform to use.
>
>
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-- 
-- 
James P. Kinney III
*
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