From: Gary Britt 

Sounds like cooperative multi-tasking versus preemptive multitasking in a way.

Gary

Rich Gauszka wrote:
> Richard B. wrote:
>> Anyone doing this?  What is your product of choice and why?
>>
>> I'm going to start digging into it a bit more aggressively in a few
>> weeks, mainly looking at comparing Virtuozzo with VMware and MS
>> Virtual Server.  Gotta get some test hardware from somewhere.
>>
>> - Richard
>
> I would think that VMware and MS VS are closer to each other than
> Virtuozzo. I do know someone that was attempting the VMware solution (
> he had some pretty good ideas ) but he lost out in some IT infighting
> with a group that feared the loss of overtime 
>
> http://www.webhostingtalk.com.au/showthread.php?t=3980
>
> Virtuozzo is specifically targeting the hosting market. For this reason
> it is more essential that someone is able to maximise the host servers
> resources rather than provide for all the additional extras commonly
> associated with a standard PC (eg. shared USB buses, shared & dedicated
> ethernet devices etc).
>
> VMWare on the other hand is on the opposite end of the scale. It
> provides the ability to determine which virtual machines have access to
> what resources including (but not limited to) ethernet, usb & telephony
> devices. It guarantees the virtual machine IS a machine in it's own right.
>
> To this effect it's even possible to deploy your own BIOS subsystem or
> setup a null modem link between 2 virtual (or 1 virtual & real through a
> shared serial device) machines.
>
> It really depends what your trying to do. Virtuozzo means you'll be able
> to dynamically share resources between machines (even overselling
> processor & memory if you so wish) at the expense of not appearing to be
> a real machine (ie. you couldn't start playing with the /dev filesystem
> freely). VMWare means you can create virtual hardware devices and
> "tweak" them via /dev at the expense of not being able to dynamically
> share resources (ie. if you allocate 1GB of RAM to one virtual machine,
> it's committed and won't be shared by the real machine or another
> sibling virtual machine).

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