Re: [Qemu-devel] [Qemu-discuss] Estimation of qcow2 image size converted from raw image

[Alberto Garcia]

On Wed 15 Feb 2017 04:57:12 PM CET, Nir Soffer wrote:
>>> Let's try this syntax:
>>>
>>>   $ qemu-img query-max-size -f raw -O qcow2 input.raw
>>>   1234678000
>>>
>>> As John explained, it is only an estimate.  But it will be a
>>> conservative maximum.
>>
>> This forces you to have an input file. It would be nice to be able to
>> get the same information by merely giving the desired capacity e.g
>>
>>   $ qemu-img query-max-size -O qcow2 20G
>
> Without a file, this will have to assume that all clusters will be
> allocated.

...and that there are no internal snapshots. I'm not sure if this is
very useful in general.

Berto