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.,<div><br></div><div> vmware ballooning</div><div><br></div><div>... to learn more about it. This blog post talks about some of the other techniques.<br>
</div><div><br></div><div> <a href="http://blogs.vmware.com/virtualreality/2011/02/hypervisor-memory-management-done-right.html">http://blogs.vmware.com/virtualreality/2011/02/hypervisor-memory-management-done-right.html</a><br>
<br>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.</div>
<div><br><div class="gmail_quote">On Fri, Jul 12, 2013 at 8:15 AM, Lightner, Jeff <span dir="ltr"><<a href="mailto:JLightner@water.com" target="_blank">JLightner@water.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal">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?<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">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.<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
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