<div dir="ltr">That's correct with RHEL/KVM/ovirt. The ballooning must be installed on each client.<br></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Fri, Jul 12, 2013 at 9:27 AM, Beddingfield, Allen <span dir="ltr"><<a href="mailto:allen@ua.edu" target="_blank">allen@ua.edu</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Under VMware, you have "transparent page sharing" (<a href="http://www.virtualizationadmin.com/blogs/lowe/news/what-is-transparent-page-sharing-2-335.html" target="_blank">http://www.virtualizationadmin.com/blogs/lowe/news/what-is-transparent-page-sharing-2-335.html</a>), 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.<br>
<span class="HOEnZb"><font color="#888888"><br>
<br>
Allen Beddingfield<br>
Systems Engineer<br>
The University of Alabama<br>
</font></span><div class="HOEnZb"><div class="h5"><br>
On 7/12/13 7:16 AM, Lightner, Jeff wrote:<br>
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?<br>
<br>
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.<br>
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