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Hello Aleksandr,

Thank you for your efforts and sharing this.

Looking closer to figures, I can assume that lightweight session won't help
us a lot, but will introduce additional complexity.

So, I'm marking the BP as Obsolete.

Ilya Sviridov
isviridov @ FreeNode



On Mon, Sep 29, 2014 at 1:21 PM, Aleksandr Chudnovets <
achudnovets at mirantis.com> wrote:

> Hello team,
>
> As it was discussed on IRC meeting yesterday I’m glad to share the results
> of my testing of performance impact of PKI token validation.
>
> My research is connected with bp [1] about adding lightweight session to
> mdb for improvement overall performance.
>
> For my tests I used PKI tokens with and without service catalog.
>
> (Actually, PKI tokens is only option for MagnetoDB, because MagnetoDB
>
> was designed to handle huge amount of requests per second.)
>
> Here is my results:
>
> - for lightweight requests, like list_tables, we can get 5% - 8%
> performance boost using tokens without service catalog;
>
> - for big and slow requests, like batch_write, performance boost is
> smaller.
>
> - disabling keystone support in api-paste gives us 20% performance boost
> for PKI tokens :)
>
> So it can be good practice for MagnetoDB clients to use PKI tokens without
>
> service catalog.
>
> Another conclusion I can made, the PKI token validation works fast enough
> and adding additional session mechanism won’t give big performance boost.
>
> Please share your views.
>
> [1] https://blueprints.launchpad.net/magnetodb/+spec/light-weight-session
>
> Thanks,
>
> Aleksandr Chudnovets
>
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