[ale] VMware Server 2.0 resource usage calculations.

[Jim Kinney]

Here's hoping VMWare"does the right thing" as outlined in the [1] LWN
article.

This has potential impact on OpenSSI as well

On Fri, Dec 12, 2008 at 12:19 PM, Brian Pitts <brian at polibyte.com> wrote:

> On Fri, 2008-12-12 at 09:30 -0500, Ed Landa wrote:
> > > I just installed a CentOS 5.2 guest today and did updates.  VMware is
> > > telling me that the guest is using 25MB.  Free on the guest tells me
> > > a totally different story.
> >
> > IIRC, vmware actually consolidates identical pages across multiple
> > virtual machines.  So, if you have an identical libc paged in on 3
> > machines, it only stores one copy in memory and references it from each
> > of the VMs.  There is a stat to account for this, but I've forgotten the
> > term.
>
> Some developers were adding this capability more generically to the
> kernel [0], but it appears VMware has patented the idea. [1]
>
> [0] http://lwn.net/Articles/306704/
> [1] http://lwn.net/Articles/309155/
>
> -Brian
>
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-- 
-- 
James P. Kinney III
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