I was interested in using 'virsh vol-upload' and 'virsh vol-download', rather than mucking about directly with the filesystem. But while simply copying the image is relatively quick:
# ls -l /var/lib/libvirt/images/centos-7-cloud.qcow2
-rw-r--r--. 1 qemu qemu 1004994560 Apr 15 2015 centos-7-cloud.qcow2
# time cp /var/lib/libvirt/images/centos-7-cloud.qcow2 /tmp/myimage.qcow2
real 0m10.829s
user 0m0.024s
sys 0m1.668s
Trying to do the same thing with `virsh vol-download` is glacial:
# time virsh vol-download --pool default centos-7-cloud.qcow2
/tmp/myimage.qcow2
I killed it after 10 minutes:
real 10m20.775s
user 10m19.451s
sys 0m1.887s
After which is was about halfway through:
# ls -l /tmp/myimage.qcow2
-rw-r--r--. 1 root root 564920248 Mar 4 11:11 /tmp/myimage.qcow2
What is up with that?
--
Lars Kellogg-Stedman <l...@redhat.com> | larsks @ {freenode,twitter,github}
Cloud Engineering / OpenStack | http://blog.oddbit.com/
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