[Users] failover

[JF]

Maybe the new dialog module can be used to store state of dialogs in
shared storage (e.g. DB)...

On 5/9/06, Bogdan-Andrei Iancu <bogdan at voice-system.ro> wrote:
> Hi Cseke,
>
> Cseke Tamas wrote:
>
> > Mike Williams wrote:
> >
> >> If you use only transaction statefulness (the only stateful mode the
> >> stable branch of OpenSER can do), this should not be a problem, as
> >> the INVITE and BYE messages are separate transactions. If you account
> >> to the same backend, you should maintain accounting consistency, too.
> >>
> >> ---Mike
> >>
> >>
> >>
> > That means, if one proxy dies during the session, the UA'll make a DNS
> > SRV lookup, find the other proxy, and send the BYE to it instead of
> > the proxy, which served the INVITE?
>
> not quite - all sequential request (within the dialog) are routed based
> on the route set (the Record Route hdr added by the proxies on the
> path). The headers contains IP addresses, so basically no DNS lookup is
> done for sequential requests. An alternative will be to configure your
> proxy to put DNS name instead of IP in the RR hdr.
>
> > Beacause of openser is only transaction stateful it don't know nothing
> > about the session eg: to which INVITE belongs to this BYE?
>
> right
>
> > I planned to use TM module t_replicate function to replicate all
> > messages to all proxy, it 's no sense, if openser doesn't maintain the
> > states of dialog, isn't it?
>
> right
>
> regards,
> bogdan
>
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