[openstack-dev] [glance] Does glance_store swift driver support range requests ?

Duncan Thomas duncan.thomas at gmail.com
Wed Nov 15 11:28:01 UTC 2017

On 15 November 2017 at 11:15, Matt Keenan <matt.keenan at oracle.com> wrote:
> On 13/11/17 22:51, Nikhil Komawar wrote:
> I think it will a rather hard problem to solve. As swift store can be
> configured to store objects in different configurations. I guess the next
> question would be, what is your underlying problem -- multiple build
> requests or is this for retry for a single download?
> If the image is in image cache and you are hitting the glance node with
> cached image (which is quite possible for tiny deployments), this feature
> will be relatively easier.
> So the specific image stored in glance is a Unified Archive
> (https://docs.oracle.com/cd/E36784_01/html/E38524/gmrlo.html).
> During a UAR deployment the archive UUID is required and it is contained in
> the first 33 characters of the UAR image, thus a range request for this
> portion is required when initiating the deployment. Then the rest of the
> archive is extracted and deployed.

Given the range you want is always at the beginning, is a range
request any different to doing a full get request and dripping the
connection when you've got the bytes you want?

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