For `openstack` command instead of the direct glance command, it switched the
backend from the glanceclient to OpenStackSDK starting at Ussuri.
https://review.opendev.org/c/openstack/python-openstackclient/+/650374
Whenever `openstack image create --file` is used, it should report the
image size in the request properly and the glance-api server side should
switch to the multipart upload mode when the image is bigger than 100MB
(s3_store_large_object_size). That means the upload should be split into
100MB chunks so it shouldn't take exponential time but it should be
linear instead.
This is with a 2GB image.
$ time openstack image create \
--file my-image.img \
--disk-format raw --container-format bare \
--progress \
"my-image"
real 0m17.204s
user 0m3.859s
sys 0m2.388s
$ time glance image-create \
--store s3 \
--file my-image.img --name "my-image" \
--disk-format raw --container-format bare \
--progress
real 3m51.790s
user 0m1.962s
sys 0m1.393s
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https://bugs.launchpad.net/bugs/1934849
Title:
s3 backend takes time exponentially
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