[ale] Memory and virtualization

[Ed Cashin]

One early technique (I saw a presentation on it at OSDI 2003, I think) for
reclaiming memory from guests was memory ballooning.  You can Google for,
e.g.,

  vmware ballooning

... to learn more about it.  This blog post talks about some of the other
techniques.


http://blogs.vmware.com/virtualreality/2011/02/hypervisor-memory-management-done-right.html

I have no idea, really, about Hyper-V, but these are the most obvious
techniques to use, so I assume Hyper-V has to use the same kinds of
techniques.  I'd be interested to hear about anything original they've come
up with.

On Fri, Jul 12, 2013 at 8:15 AM, Lightner, Jeff <JLightner at water.com> 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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-- 
  Ed Cashin <ecashin at noserose.net>
  http://noserose.net/e/
  http://www.coraid.com/
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