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On 03/02/14 12:44 -0500, Jay Pipes wrote:
>On Mon, 2014-02-03 at 17:04 +0100, Flavio Percoco wrote:
>> On 03/02/14 10:13 -0500, Jay Pipes wrote:
>> >On Mon, 2014-02-03 at 10:03 +0100, Flavio Percoco wrote:
>> >> IMHO, the bit that should really be optimized is the selection of the
>> >> store nodes where the image should be downloaded from. That is,
>> >> selecting the nearest location from the image locations and this is
>> >> something that perhaps should happen in glance-api, not nova.
>> >
>> >I disagree. The reason is because glance-api does not know where nova
>> >is. Nova does.
>>
>> Nova doesn't know where glance is either. More info is required in
>> order to finally do something smart here. Not sure what the best
>> approach is just yet but as mentioned in my previous email I think
>> focusing on the stores for now is the thing to do. (As you pointed out
>> bellow too).
>
>Right, which is why I am recommending to get rid of glance-api below...
>
>> >I continue to think that the best performance gains will come from
>> >getting rid of glance-api entirely, putting the block-streaming bits
>> >into a separate Python library, and having Nova and Cinder pull
>> >image/volume bits directly from backend storage instead of going through
>> >the glance middleman.
>>
>> This is exactly what we're doing by pulling glance.store into its own
>> library. I'm working on this myself. We are not completely getting rid
>> of glance-api but we're working on not depending on it to get the
>> image data.
>
>Cool. Have you pushed a patch for this I can see?

Not to gerrit but I'm hacking on this in my own GH repo first. I'll be
submitting that patch soon, hopefully. This is the blueprint[0] for the
glance.store work, there you'll find the link to my GH repo! :)

[0] https://blueprints.launchpad.net/glance/+spec/create-store-package

>Thanks, Flavio!

Cheers :)
Flavio

-- 
@flaper87
Flavio Percoco
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