I update: because openstack xena and yoga using kolla-ansible(cinder docker image base 20.04) have a problem with qemu-img version 4.2.1 (Debian 1:4.2-3ubuntu6.25). it will cause the copy image to volume very slow, to fix this we need upgrade to qemu-img version 6.2.0 (Debian 1:6.2+dfsg-2ubuntu6.7). I use kolla build to do this. preference: https://bugzilla.redhat.com/show_bug.cgi?id=1847192 Nguyen Huu Khoi On Thu, Apr 13, 2023 at 9:00 PM Nguyễn Hữu Khôi <nguyenhuukhoinw@gmail.com> wrote:

Hello guys. I am using nfs for glance and SAN for cinder but when i create 1 gb volume with 100mb image(Converted 112.00 MB image at 25.4 MB/s) then it will fast. however, if I create 100gb volume with 100mb image(Converted 112.00 MB image at 8.24 MB/s) then it will very slow.

Pls give me some advices. ty

Nguyen Huu Khoi