Sometimes I think that Db2 is one of the most widely used but least known databases. Db2 has been adopted all over the world and that scope is evident when the International Db2 User Group (IDUG) holds a technical conference on at least three different continents each year. I’ve traveled and spoken in North America and Europe but now I get to cross IDUG Australia off my bucket list.
DB2 has one or two ports that it is listening on for each and every Db2 instance. Two Db2 instances cannot share a port to listen on. Remember that Db2 allows multiple instances per server and also multiple databases per instance, and has for years.