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<div class="moz-cite-prefix">On 02/21/2014 07:04 AM, Fleep Tuque
wrote:<br>
</div>
<blockquote
cite="mid:CAG6z+U6-2T=6mu=hGA+WhORM5pDuRypguTMpBcQ7+gEXz6AuqA@mail.gmail.com"
type="cite">
<div dir="ltr">I don't have nearly as much experience or expertise
with optimizing OpenSim as some of the folks who have already
posted, but we did a fair bit of performance testing at UC
trying to decide which approach was better, and in my experience
the virtual machine route just didn't perform as well as running
on physical hardware.
<div>
<br>
</div>
<div>For something like a personal sandbox, or a small community
grid where you don't expect much concurrency, it probably
would work just fine. For a full on grid hosting many
projects or people, I personally wouldn't go with a vm route.</div>
<div><br>
</div>
<div>- Chris</div>
</div>
</blockquote>
<br>
There is no reason why OpenSim on a correctly configured VM given
enough resources shouldn;t perform as well as a physical machine.
Dahlia mentioned timer accuracy and that could be an issue but even
then on any recent hardware the differences should be minimal.<br>
<br>
If you are trying to use Linux I'd recommend the Mono 3.x codebase.
I'm finding its performance is significantly better. That probably
requires building by yourself although there is a ppa available for
Ubuntu.<br>
<br>
Mike<br>
<br>
<blockquote
cite="mid:CAG6z+U6-2T=6mu=hGA+WhORM5pDuRypguTMpBcQ7+gEXz6AuqA@mail.gmail.com"
type="cite">
<div dir="ltr">
<div><br>
</div>
<div><br>
</div>
<div>
<div>Chris M. Collins (Avatar: Fleep Tuque)</div>
<div>Center for Simulations & Virtual Environments
Research (UCSIM)</div>
<div>UCIT Research & Development, Innovation &
Partnerships</div>
<div>UC Office of Information Technologies </div>
<div>University of Cincinnati</div>
<div>400 University Hall</div>
<div>PO Box 210658</div>
<div>Cincinnati, OH 45221-0658</div>
<div><a moz-do-not-send="true"
href="mailto:chris.collins@uc.edu">chris.collins@uc.edu</a></div>
<div>(513) 556-3018</div>
<div><br>
</div>
<div><a moz-do-not-send="true" href="http://ucsim.uc.edu">http://ucsim.uc.edu</a></div>
</div>
</div>
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">On Fri, Feb 21, 2014 at 6:56 AM,
R.Gunther <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:rigun@rigutech.nl" target="_blank">rigun@rigutech.nl</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
<div>Only tried opensim in virtualbox (on windows :O )
with opensuse as guest.<br>
But the biggest problem i see is the hdd speed. maby not
enough cpu resources. assigned 2-3 cores.<br>
But it where a bit more laggy. but linux is not the best
choice for opensim anyway, so it maby could be mono to.
<div>
<div class="h5"><br>
<br>
On 2014-02-21 07:37, John Sheridan wrote:<br>
</div>
</div>
</div>
<div>
<div class="h5">
<blockquote type="cite"> If you're looking to run your
own hypervisor I'd suggest something called
Proxmox. Its open source / linux based and allows
you to create both openvz and kvm containers via a
nifty web interface. Their website is <a
moz-do-not-send="true"
href="https://pve.proxmox.com" target="_blank">https://pve.proxmox.com</a><br>
<br>
<br>
<div>On 02/21/2014 12:24 AM, Dahlia Trimble wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">
<div>
<div>I've used OpenSimulator in a variety of
virtual machines, from KVM to OpenVZ to
VirtualBox to EC2. In general performance is
less than when running in bare hardware but
everything usually works. I've seen some
issues with timer accuracy in some virtual
machines in the past and had to compile a
custom linux kernel to get around it, but I
think recent virtualization technology has
probably fixed this. Some technologies like
OpenVZ I found very difficult to work with
in general and I prefer to stick with the
KVM style approach where the host OS kernel
is set up to allow a "closer to the metal"
virtualization.<br>
<br>
</div>
I think virtual machines are good for lower
performance installations where fewer avatars
and scripts are expected. and bare metal
should be used where higher performance is
needed.<br>
<br>
</div>
Often hosting companies will oversell and you
may get a lot less performance than you would
expect from their advertised specifications. If
performance is poor with one company, try
others. The cheapest deal is usually far from
the best.<br>
</div>
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">On Thu, Feb 20, 2014 at
2:48 PM, Justin Clark-Casey <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:jjustincc@googlemail.com"
target="_blank">jjustincc@googlemail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px
#ccc solid;padding-left:1ex">I've seen
OpenSimulator run under different virtual
machines (Xen and EC2). Back a few years
ago, there was a very odd issue when using
EC2 where the simulator process wouldn't
certain start context switching millions of
times and freeze out all other processes,
though that may have been a mono issue
rather than EC2.<br>
<br>
Other than that, it appears to work just
fine as long as you give it sufficient CPU
resources, as is the case when running on
bare metal.
<div>
<div><br>
<br>
On 20/02/14 21:19, <a
moz-do-not-send="true"
href="mailto:dogwomble@exemail.com.au"
target="_blank">dogwomble@exemail.com.au</a>
wrote:<br>
<blockquote class="gmail_quote"
style="margin:0 0 0
.8ex;border-left:1px #ccc
solid;padding-left:1ex"> Hi all<br>
<br>
I wad wondering if anyone had much
experience with running OpenSim under
a<br>
virtual machine? I'm interested in
finding out what sort of performance<br>
can be expected from running in that
sort of environment and how far it<br>
can be pushed without too many issues.<br>
<br>
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<br>
<br>
</div>
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<span><font color="#888888"> -- <br>
Justin Clark-Casey (justincc)<br>
OSVW Consulting<br>
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