There is a bit of confusion, at least on my part. First you asked
about "open source" virtualisation and people are proposing non-free
(proprietary licensed) solutions. And now you don't even mention open
source, just what you want to achieve. So which is it?

Xen is open sourced (GPL2) and in the repositories. VirtualBox has a
crippled open source version (no usb) in the repositories. KVM (GPL2)
is an option because Ubuntu supports it both in the kernel and in the
repositories with qemu-kvm (GPL2). VMWare is NOT open source. If open
source does not matter then why ask for open source virtualisation?

Roy

Using Kubuntu 11.04, 64-bit
Location: Canada



On 25 April 2011 22:18, Jibz <[email protected]> wrote:
> Sorry. I Meant virtualization only. I want one which has all options like
> USB, desktop etc and has good manuals. I dont prefer that it be easy to set
> up though.
>
> On Tue, Apr 26, 2011 at 00:37, Chris Miller <[email protected]>
> wrote:
>>
>> On Mon, Apr 25, 2011 at 10:23 AM, Bill Oliver <[email protected]>
>> wrote:
>> > Is VirtualBox really significantly slower?
>> >
>> > Bummer. It was so easy to set up, too.  How much performance am I
>> > losing?
>>
>> It's slower on disk I/O. On most CPU/RAM operations it's not much
>> different than a natively running OS. The same is true for Xen. The
>> difference is that because Xen uses a specialized kernel for the guest
>> OS, it's much more performant for disk I/O and caching.
>>
>> > Basically, I have an app that requires RH Enterprise, so I run CentOS on
>> > my
>> > Mandriva box using VirtualBox.  It's a visualization program, and I
>> > noticed
>> > that some of the volume rendering was a little slow, but I assumed that
>> > was
>> > due to my processor, and not to my virtualizaton...
>>
>> Graphics acceleration for guest OSes is still in a state of
>> terribleness. The only one that I've seen that doesn't look like a
>> massive tub of fail is VMWare Fusion 3. Fusion 2 was OK, and Fusion 1
>> had OK graphics acceleration, but it was still new and quite buggy. I
>> don't pay too much attention to Parallels desktop simply because past
>> hosting experience with Parallels tech has convinced me that their
>> ability to access disk resources is slow.
>>
>> VirtualBox does have some 3D acceleration, though I haven't used it
>> much. It's probably unstable and I wouldn't suggest it on a Linux
>> host. Linux GFX drivers are fail, and will crash just as soon as look
>> at you. GFX drivers on Windows and Mac OS X are less fail (but still
>> pretty terrible).
>>
>> I wholly recommend that you try enabling 3D acceleration, but don't be
>> surprised if X11 locks up or your machine does a hard reset.
>>
>> --
>> Registered Linux Addict #431495
>> For Faith and Family! | John 3:16!
>> fsdev.net | 0x5f3759df.org | chrismiller.at
>>
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>
>
> --
> Jibu N.C.
>
>
>
>
> "Don't tell God how big your storm is, Tell the storm how big your God
> is!!!!!"
>
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