Open Stack

John,

Adam had a blog post on Compressed Tokens that might help shed a little
light on them in general[1]. We also have a blueprint for tracking the work
as it gets done[2].


[1] http://adam.younglogic.com/2014/02/compressed-tokens/
[2] https://blueprints.launchpad.net/keystone/+spec/compress-tokens


On Wed, May 21, 2014 at 10:41 AM, John Dickinson <me at not.mn> wrote:

> Can you explain how PKI info is compressible? I thought it was encrypted,
> which should mean you can't compress it right?
>
>
> --John
>
>
>
>
>
> On May 21, 2014, at 8:32 AM, Morgan Fainberg <morgan.fainberg at gmail.com>
> wrote:
>
> > The keystone team is also looking at ways to reduce the data contained
> in the token. Coupled with the compression, this should get the tokens back
> down to a reasonable size.
> >
> > Cheers,
> > Morgan
> >
> > Sent via mobile
> >
> > On Wednesday, May 21, 2014, Adam Young <ayoung at redhat.com> wrote:
> > On 05/21/2014 11:09 AM, Chuck Thier wrote:
> >> There is a review for swift [1] that is requesting to set the max
> header size to 16k to be able to support v3 keystone tokens.  That might be
> fine if you measure you request rate in requests per minute, but this is
> continuing to add significant overhead to swift.  Even if you *only* have
> 10,000 requests/sec to your swift cluster, an 8k token is adding almost
> 80MB/sec of bandwidth.  This will seem to be equally bad (if not worse) for
> services like marconi.
> >>
> >> When PKI tokens were first introduced, we raised concerns about the
> unbounded size of of the token in the header, and were told that uuid style
> tokens would still be usable, but all I heard at the summit, was to not use
> them and PKI was the future of all things.
> >>
> >> At what point do we re-evaluate the decision to go with pki tokens, and
> that they may not be the best idea for apis like swift and marconi?
> >
> > Keystone tokens were slightly shrunk at the end of the last release
> cycle by removing unnecessary data from each endpoint entry.
> >
> > Compressed PKI tokens are enroute and will be much smaller.
> >
> >>
> >> Thanks,
> >>
> >> --
> >> Chuck
> >>
> >> [1] https://review.openstack.org/#/c/93356/
> >>
> >>
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