[Fedora-xen] Guest Image File Size

[Sadique Puthen]

Aaron Metzger wrote:
> virt-install has a checkbox which suggests that you can avoid 
> preallocating the entire guest image size -- that the guest image file 
> will grow on demand.
>
> Does this work for Xen or is it only supported for KVM and the QEMU 
> COW files?

yes, this works fine on xen.

>
> My experience when creating Xen guests as regular files is that I end 
> up with a file that is the full size even when I pick the option to 
> not preallocate the entire image.

Basically it if you don't pre-allocate the entire image, virt-manager 
creates a sparse file to store the guest data which only occupies disk 
blocks while you write contents to that sparse file . When checking the 
size of the pre-allocated and sparse images, you should use "du", not 
"ls -lh".

--Sadique

>
>
> -- 
> Thanks,
> Aaron
>
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