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Multi functional app to find duplicates, empty folders, similar images etc. - qarmin
If you transfer qcow2 images very frequently across OpenStack Clouds or between KVM and Openstack environments, they can quickly grow larger. Luckily qcow2 image size can be decreased to reasonable values using qemu-img tool. Below we present how to shrink Openstack/KVM qcow2 image.
Examples:
Shrink qcow2 image without compression (larger file, short compression time):
[root@tuxfixer ~]# qemu-img convert -O qcow2 centos7.qcow2 centos7_small.qcow2
Shrink qcow2 image with compression (smaller file, long compression time):
[root@tuxfixer ~]# qemu-img convert -O qcow2 -c centos7.qcow2 centos7_small.qcow2
je me garde cet article sous le coude
Merci @sebsauvage