[OpenSIPS-Users] [NEW] Dialog replication using a new core interface

Bogdan-Andrei Iancu bogdan at opensips.org
Mon Jul 29 18:46:31 CEST 2013

In long term we plan to use the BIN interface to replicate even more
internal data between multiple OpenSIPS instances, like doing
registration replication (instead of doing it from script via SIP).
Theoretically it may be used for replicating even transaction state
between 2 OpenSIPS instances - imagine having a call ringing on instance
A and being accepted on instance B (after a failover) - 0% losses !

Aside realtime data replication, the BIN interface is to be used also
for exchanging any other type of information between OpenSIPS instances,
like federating multiple instances.

The main advantages of the BIN interface over the MI interface :
    - BIN is binary encoded so much faster (as performance)
    - BIN interface has both sender and receiver in OpenSIPS (MI has
only the receiver)
    - MI is for external usage, while BIN is internal (opensips2opensips)


Bogdan-Andrei Iancu
OpenSIPS Founder and Developer

On 07/29/2013 06:22 PM, Liviu Chircu wrote:
> Hello all,
> OpenSIPS just got better with a /new core interface/ and a /new
> failover mechanism/!
> The purpose of the new *Binary Internal Interface *is to offer a fast
> and efficient communication channel between OpenSIPS instances.
> OpenSIPS modules can now use this core interface to send/receive
> packets with specific information. A common usage case for this
> feature would be data replication between a primary instance and a
> backup one.
> This is especially useful in scenarios with OpenSIPS instances which
> handle large amounts of concurrent calls, so that failover through a
> database backend is not feasible anymore due to the significant time
> required in order to load the needed tables.
> As an example of using the interface, the dialog module now offers the
> possibility of *replicating dialogs* to another instance. The script
> writer may now configure a set of proxies which will receive
> dialog-related events: /creation/, /confirmation/ and /deletion/, all
> in /realtime/. These messages are compact and they are sent over UDP.
> The dialog module now also exports several new statistics which show
> the total sent/received replication packets.
> Configuring UDP listeners for the new interface is trivial and
> explained in the OpenSIPS manuals [1].
> [1]: http://www.opensips.org/Documentation/Interface-Binary
> Best regards,
> -- 
> Liviu Chircu
> OpenSIPS Developer
> http://www.opensips-solutions.com
> _______________________________________________
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> Users at lists.opensips.org
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