Hello,
Am Dienstag 02 November 2010 23:45:59 schrieb Eric Blake:
> On 10/25/2010 08:06 AM, Richard W.M. Jones wrote:
> >> libvirt's qemu driver doesn't currently preallocate qcow2 metadata
> >> when creating a new image. Given the tiny disk space overhead of the
> >> metadata (0.02%) and the small processing overhead of pre-creation
> >> relative to subsequent creation on-the-fly, I suggest that the
> >> libvirt qemu driver is updated to pre-allocate metadata by default.
...
> Is this something that we should just globally enable if qemu supports
> it, or do we need some XML tunable to allow someone to skip the
> pre-allocation for some reason?
I don't know if its relevant, but if you create a qcow2 image, which is based
on another base-image, you must not pass the option to pre-allocate, else you
get the following error message:
Backing file and preallocation cannot be used at the same time
Sincerely
Philipp Hahn
--
Philipp Hahn Open Source Software Engineer hahn@xxxxxxxxxxxxx
Univention GmbH Linux for Your Business fon: +49 421 22 232- 0
Mary-Somerville-Str.1 28359 Bremen fax: +49 421 22 232-99
http://www.univention.de
Attachment:
signature.asc
Description: This is a digitally signed message part.
-- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list