32 Virtual PC performance vs Installed on 64 bit machine

Hi all,
We have a 64 bit machine that for various reasons (compatibility) we may
need to install a 32 bit os on. The alternative is to set up a VM on the
machine. Is the performance of the VM likely to be significantly different
to a 'native' 32 bit os installation? Thanks...

--
Regards,
Mark

That's a very hard question to answer without knowing what you're going to
run on it. Some things are faster in a VM than others.

--
Bob Comer


"Mark Love" <> wrote in message
news:79DF5C60-E733-4756-BB51-...
> Hi all,
> We have a 64 bit machine that for various reasons (compatibility) we may
> need to install a 32 bit os on. The alternative is to set up a VM on the
> machine. Is the performance of the VM likely to be significantly different
> to a 'native' 32 bit os installation? Thanks...
>
> --
> Regards,
> Mark

Thanks for coming back Bob. They're development machines so will be running
Visual Studio with some third-party libraries and probably an Oracle 10
instance for local development purposes. It's only the libraries and the
Oracle 10 that are the problem here, otherwise we'd just run 64 bit anyway.
Thanks...

--
Regards,
Mark

"Robert Comer" <bobcomer-removeme-@mindspring.com> wrote in message
news4454357-DB2A-476E-B19A-...
> That's a very hard question to answer without knowing what you're going to
> run on it. Some things are faster in a VM than others.
>
> --
> Bob Comer
>
>
> "Mark Love" <> wrote in message
> news:79DF5C60-E733-4756-BB51-...
>> Hi all,
>> We have a 64 bit machine that for various reasons (compatibility) we may
>> need to install a 32 bit os on. The alternative is to set up a VM on the
>> machine. Is the performance of the VM likely to be significantly
>> different to a 'native' 32 bit os installation? Thanks...
>>
>> --
>> Regards,
>> Mark
>

A lot of disk access can be slower but you should be mostly okay. I'd test
first before jumping in, I don't really know how well Oracle runs in a VM.
If you have fast disks and you allocate a fixed size VHD it should be pretty
close to real hardware.

One problem though at the moment, networking between the host and guest has
a bug in it right now and is extremely slow. There's no problem talking to
other PC's from the guest, just not the host. The workaround for that is to
use a dedicated NIC for the guest(s).

--
Bob Comer



"Mark Love" <> wrote in message
news:74F57963-F27B-4A88-95D2-...
> Thanks for coming back Bob. They're development machines so will be
> running Visual Studio with some third-party libraries and probably an
> Oracle 10 instance for local development purposes. It's only the libraries
> and the Oracle 10 that are the problem here, otherwise we'd just run 64
> bit anyway. Thanks...
>
> --
> Regards,
> Mark
>
> "Robert Comer" <bobcomer-removeme-@mindspring.com> wrote in message
> news4454357-DB2A-476E-B19A-...
>> That's a very hard question to answer without knowing what you're going
>> to run on it. Some things are faster in a VM than others.
>>
>> --
>> Bob Comer
>>
>>
>> "Mark Love" <> wrote in message
>> news:79DF5C60-E733-4756-BB51-...
>>> Hi all,
>>> We have a 64 bit machine that for various reasons (compatibility) we may
>>> need to install a 32 bit os on. The alternative is to set up a VM on the
>>> machine. Is the performance of the VM likely to be significantly
>>> different to a 'native' 32 bit os installation? Thanks...
>>>
>>> --
>>> Regards,
>>> Mark
>>

Mark Love wrote:
> Thanks for coming back Bob. They're development machines so will be
> running Visual Studio with some third-party libraries and probably an
> Oracle 10 instance for local development purposes. It's only the
> libraries and the Oracle 10 that are the problem here, otherwise we'd
> just run 64 bit anyway. Thanks...

I've used a two guest layout with VPC 2004 and 2007 for a while, one
virtual machine running Oracle 9 and the other one Tomcat, Apache and
Eclipse. This setup is slower than running the software directly on the
host machine, but easier to manage. It is definitely slower than having
your own dedicated Oracle server on another machine. Oracle works fine,
even with limited memory. Don't expect a realistic response time from
data warehouse applications with lots of data and huge result sets. If
your IDE has to support a large development environment with extended
compilation times, you might get frustrated.

Regards,
Andreas

Robert Comer wrote:
> One problem though at the moment, networking between the host and guest
> has a bug in it right now and is extremely slow. There's no problem
> talking to other PC's from the guest, just not the host.

With what virtualization product? Are you talking about WVPC here?

--
David Wilkinson
Visual C++ MVP

> With what virtualization product? Are you talking about WVPC here?

Yes, WVPC, but I just figured out a workaround yesterday for the problem
that fixes it, you need to turn off TCP offloading.

--
Bob Comer

"David Wilkinson" <no-> wrote in message
news:...
> Robert Comer wrote:
>> One problem though at the moment, networking between the host and guest
>> has a bug in it right now and is extremely slow. There's no problem
>> talking to other PC's from the guest, just not the host.
>
> With what virtualization product? Are you talking about WVPC here?
>
> --
> David Wilkinson
> Visual C++ MVP