This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
Home Products Support Community News


Re: [Xen-users] streaming server on a virtual machine.

Ah, this leads me to my next ?

Do VMs need exclusive access to disk or can I have a common space on the dom0 with multiple domUs accessing it via phy mechanism?

- Brian

On Sep 27, 2009, at 4:55 PM, Grant McWilliams wrote:

On Sun, Sep 27, 2009 at 2:55 PM, Brian Krusic <brian@xxxxxxxxxx> wrote:
why would fewer i/o's be needed when accessing lvm vs non lvm if both underlying fs was ext3?

i'm not challenging, just asking as this could effect how i look at things, i would ofcourse verify this as well.

you have the awsome advantage of testing intricate setups which is valuable.

- Brian


    I'll tell you my theory and if anyone knows for sure can pipe up. If you are accessing an ext3 filesystem in a diskfile inside an ext3 filesystem on a disk the OS(s) will have more work to do than accessing an ext3 filesystem on a disk. With the LVM method you're passing through the disk (via phy:) to the VM so it's accessing it directly. I don't really think it has anything to do with LVM, that's just how I passed it to the VM.

Grant McWilliams

Xen-users mailing list
<Prev in Thread] Current Thread [Next in Thread>