With PostGreSQL it is possible to specify multiple host components, each with an optional port component, in a single URI. A URI of the form

 postgresql://host1:port1,host2:port2,host3:port3/ 

is equivalent to a connection string of the form

 host=host1,host2,host3 port=port1,port2,port3. 

Each host will be tried in turn until a connection is successfully established.

I'd like UniDAC to support this approach.