Has anyone done configuring the presence module only with DB.

In my requirement, I am going to have multiple servers and share the same DB for presence info and 

enable Publish/Unpublish and Subscribe/UnSubscribe for all the clients who will be connecting to different Kamailio servers.

Also expecting the NOTIFY to happen without any issues.

I tried to get this done with  modparam("presence", "subs_db_mode", 3)

Please guide me for this.

Best Regards,

Roy.