Comment 1 for bug 2027970

We were able to recreate the behavior of it being slower due to chuncked encoding outside of cinder volume. However, only with the python-glanceclient and not with the python-openstackclient.

This is because the python-openstackclient does not use chunked encoding when uploading. Removing this from the python-glanceclient with the above patch we have seen the same constant performance as the python-openstack client. In our environment this is about 700mb/s, as with cinder in combination with the tpool patch.