virtualbox.org

Hi all,

I previously posted a "success story" with VB3.0.2 and a single guest CPU. I recently decided to test a multi-CPU configuration (2 cpus) for the guest (Ubuntu 9.0.4 32bit btw on an XP host). That initially seemed to work very well, until tried to access my Shared Folders. That went wrong. The program that was accessing the shared folder ("cp") hung. In addition the mouse in the guest 'froze'. It was stuck at one place in the guest window, and could not be moved. The guest did receive mouse clicks and key-board input. I could switch to a text console and work from there.

Has anybody else noticed this behaviour?

Back at 1CPU now...

BubbatheComputerGuy wrote:Should I be able to standby/hibernate my host computer while running a virtual machine?

Would it be normal for the screen to go black, but the power light stay on, and hard drive light stay active? Then when I attempt to turn the host back on, it comes to "Windows XP Preparing to Standby..." and is frozen. The only thing apparent to do then is hold the power button and cut off the host.

Thank you.

It works for me (Windows XP host, various guests) since 3.0.2 - I was pretty impressed - but I still don't think it's a good idea. To be safe I save guest state before hibernating the host.

SSCBrian wrote:

tlu wrote:

teddy wrote: To use SMP for the reason of having multiple cores for sharing the load you
should follow an easy rule. actual cores = virtual cores + 1, turn this around and you get virtual cores = actual cores - 1. You should have at least one free core to run your underlying OS and other stuff outside the VM.

Aha - if your logic is correct this would mean that you couldn't use a VM without a multi-core CPU at all

Yes, there seems to be a misunderstanding that cores are "allocated" to certain things. They are, but only very briefly during processing. There's no problem having a dual-core machine, with 2 VMs open, each of which is configured as dual processor. If there's work to be done, they can use 100% of both. If there's not work to be done, then they're not being used (with rare exceptions such as specific OS that use idle loops, rather than actually halting).

There is no misunderstanding, you will get a performance hit with more than one virtual core in a single VM on dual core host CPU. Running two separate VMs on a dualcore works like charm because you do not need all the synchronization between the virtual cores. I was talking about multi core CPUs running VMs with multi virtual cores. I would not recommend running a multi virtual core VM on a single core CPU and expect performance.

Hi all,

The press release mentions a "VirtualBox Web Console" yet google is letting me down.

-what is this feature?
-How do I use it?

Sorry if I missed something obvious!

user

I can't find it either...

Google doesn't let me down:

http://www.sun.com/featured-articles/20 ... /index.jsp

An updated API platform will be the basis of the community-driven VirtualBox Web Console project that will let you manage your datacenters from a Web console.

Sure looks like Web Console will be developed at some point.

http://code.google.com/p/vboxweb/

At this point my project (http://github.com/JshWright/vboxweb) is slightly more useful, since it allows you to start and stop VMs. However, since a lot more developer time (including my own) is going into Sun's project, I wouldn't expect that to be the case for long.

So, get coding!

~JW