[ovirt-users] engine-iso-uploader very slow

Hi, I'm a newbe with ovirt, I've install on my test machine ovirt with self hosted engine with nfs storage. I'm tryng to execute <engine-iso-uploader upload -i ISO /tmp/ubuntu-18.04-desktop-amd64.iso> and the execution is very slow, approx 2 hour, but I don't know why, any suggestion? Thanks in advance Bye