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Hi Sam,

We're just starting to look at v2.

We did see some really slow listing behaviour, backporting
Ie7458044edbe1ef64871bcf5ef4996ed3cc0f957 helped a lot -- but you'll
probably have that change already if you're using more recent code.

Even with that it does seem slower in some cases, eg devstack listing 1000 images:

  v1:
  $ time ./.tox/py27/bin/glance --os-image-api-version 1 image-list > /dev/null
  real	0m6.058s
  user	0m1.348s
  sys	0m0.172s

  v2, no registry:
  $ time ./.tox/py27/bin/glance --os-image-api-version 2 image-list > /dev/null
  real	0m15.487s
  user	0m9.233s
  sys	0m0.120s

  v2, with registry:
  $ time glance --os-image-api-version 2 image-list > /tmp/out
  real	0m21.904s
  user	0m9.217s
  sys	0m0.116s


-Stuart

On Wed, 25 Jun 2014, Sam Morrison wrote:

> We’ve recently enabled glance v2 API on our glance servers. We’ve noticed it is considerably slower than v1 to do things like glance image-list. (~4 seconds compared to ~1)
> Has anyone else experienced this or run any benchmarks comparing the two APIs?
>
> I should note we’re using glance registry for both v1 and v2 requests too.
>
> Also just wondering if people are actually using v2?
> For instance from what I can tell you can’t create an image with v2 via the client yet [1]
>
> Cheers,
> Sam
>
>
> [1] https://bugs.launchpad.net/python-glanceclient/+bug/1302351
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