Re: msgr2 protocol

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On Fri, Jun 3, 2016 at 9:24 PM, Sage Weil <sweil@xxxxxxxxxx> wrote:
> I updated the PR with an additional commit that simplifies the
> confounder.  It seems like we only need the confoudner at teh beginning of
> the session, not for every message, since the signature and encryption
> state is chained from the previous frame.  Is that right?
>
>         https://github.com/ceph/ceph/pull/9461/commits/45766fed1864733c5216a7b50f11cce256338170
>
> Full PR:
>
>         https://github.com/ceph/ceph/pull/9461
>
> --
>
> Also, I just realized that now might be a good time to address the ability
> to multiplex different endpoints (sessions) into the same connection.  We
> could add it later with the msgr feature bits, but it'll probably be
> simpler not to have to support two variants of the protocol.  On the other
> hand, it's a lot more complicated.  :(

What's the use case? different session shares the same connection? Do
you mean different messenger instance will share the same connection
pool?

>
> Initial thoughts:
>
>  - make a clearer distinction between connection (as in tcp) and a
> session (as in an exchange between two entities, one that may or may not
> have a lifecycle independent of the connection.
>  - the auth exchange is no longer always at the beginning of the
> connection.  new entities might appear in the same endpoint。
>
> sage
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