Open Stack

---use_qcow_images=True in nova.conf will do it ?

On Wed, 09 Nov 2011 00:45:18 +0100, Jae Sang Lee <hyangii at gmail.com> wrote:

> Hi,
>
> You should to modify nova.virt.libvirt.connection._create_image.
>
> This is source code about make a local disk.
>
>  959         local_gb = inst['local_gb']
>  960         if local_gb and not self._volume_in_mapping(
>  961             self.default_local_device, block_device_info):
>  962             fn = functools.partial(self._create_ephemeral,
>  963                                    fs_label='ephemeral0',
>  964                                    os_type=inst.os_type)
>  965             self._cache_image(fn=fn,
>  966                               target=basepath('disk.local'),
>  967                               fname="ephemeral_%s_%s_%s" %
>  968                               ("0", local_gb, inst.os_type),
>  969                               cow=*FLAGS.use_cow_images*,
>  970                               local_size=local_gb)
>
> You can change 'cow' value to FALSE. (FLAGS.use_cow_images is TRUE by
> default). then _cache_image function make a disk to raw format.
>
>
> 2011/11/8 ljvsss <ljvsss at gmail.com>
>
>> hi all
>>
>> if i create an instance flavor of m1.large(4u,8GRAM.80G disk),at floder
>> here /var/lib/nova/instances/instance-0000006 will have two img:disk and
>> disk.local
>> they format is same,qcow2 or raw
>> what i want is the "disk" (instance os disk) format  is qcow2,and the
>> disk.local's format is  raw,because qcow2 is small and easy to make
>> snapshots,raw's speed is bettter
>>
>> what should i do?
>>
>> thanks :)
>>
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