> >>I also read that we'll loose sparseness with qemu-img as it does raw
>
> >>export and import.
>
> I'm not sure about it, qemu-img code is
>
>
> if (has_zero_init) {
> /* If the output image is being created as a copy on write
> image,
> assume that sectors which are unallocated in the input
> image
> are present in both the output's and input's base images
> (no
> need to copy them). */
I also thought it worked this way. Is the has_zero_init flag correctly set for
RBD?
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