[jdev] S2S clustering

[Artur Hefczyc]

> I am working on clustering support in jabberd2 and have a question.
>
> Let's assume the XMPP server example.com is working on two nodes:
> A and B. Both nodes have S2S port open and configured with same SRV
> record weight.
>
> Is the serwer allowed to open two separate S2S connections to another
> server?

I think many servers already open multiple connections. As far as I know
ejabberd opens at least 2 s2s connections from each cluster node.
As far as I remember there is no limitation on this in the RFC or XEP.

> example.com A ------------>
>                            jabber.org
> example.com B ------------>
>
>
> * Should the other server will open only one returning S2S connection?
>
> - If yes, let's assume that DNS drew node B address:
>
> example.com A ------------>
>                            jabber.org
> example.com B <===========>
>
> and jabber.org is sending stanzas to example.com via node B only.
>
> ** Is node A still allowed to send stanzas, or should it terminate its
> connection?
>
>
> - or should the other server open two returning S2S connections?
>
> example.com A <===========>
>                            jabber.org
> example.com B <===========>
>
> returning every incoming S2S connection back.

 From my experience on working on s2s for the Tigase server it looks all
variants are possible and are in use currently.

Artur
-- 
Artur Hefczyc
http://www.tigase.org/
http://artur.hefczyc.net/