Open Stack

I ran virt-sparsify. So before running virt-sparsify it was 6.0GB and after
it is 1.3GB.

Thanks
Paras.

On Tue, Aug 1, 2017 at 2:53 AM, Tomáš Vondra <vondra at homeatcloud.cz> wrote:

> Hi!
>
> How big are the actual image files? Because qcow2 is a sparse format, it
> does not store zeroes. If the free space in one image is zeroed out, it
> will convert much faster. If that is the problem, use „dd if=/dev/zero
> of=temp;sync;rm temp“ or zerofree.
>
> Tomas
>
>
>
> *From:* Paras pradhan [mailto:pradhanparas at gmail.com]
> *Sent:* Monday, July 31, 2017 11:54 PM
> *To:* openstack-operators at lists.openstack.org
> *Subject:* [Openstack-operators] custom build image is slow
>
>
>
> Hello
>
>
>
> I have two qcow2 images uploaded to glance. One is CentOS 7 cloud image
> downloaded from centos.org.  The other one is custom built using CentOS
> 7.DVD.  When I create cinder volumes from them, volume creation from the
> custom built image it is very very slow.
>
>
>
>
>
> CenOS qcow2:
>
>
>
> 2017-07-31 21:42:44.287 881609 INFO cinder.image.image_utils
> [req-ea2d7b12-ae9e-45b2-8b4b-ea8465497d5a e090e605170a778610438bfabad7aa
> 7764d0a77ef520ae392e2b59074c9f88cf 490910c1d4e1486d8e3a62d7c0ae698e -
> d67a18e70dd9467db25b74d33feaad6d default] *Converted 8192.00 MB image at
> 253.19 MB/s*
>
>
>
> Custom built qcow2:
>
> INFO cinder.image.image_utils [req-032292d8-1500-474d-95c7-2e8424e2b864
> e090e605170a778610438bfabad7aa7764d0a77ef520ae392e2b59074c9f88cf
> 490910c1d4e1486d8e3a62d7c0ae698e - d67a18e70dd9467db25b74d33feaad6d
> default] *Converted 10240.00 MB image at 32.22 MB/s*
>
>
>
> I used the following command to create the qcow2 file
>
> qemu-img create -f qcow2 custom.qcow2 10G
>
>
>
> What am I missing ?
>
>
>
> Thanks
> Paras.
>
>
>
>
>
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