SCAN RAC 11g

Question

We have 2 node rac running with 1 databse currently. (XXX) which is running on port 1580 and having a application tier which is running successfully.
We need to add another database on the same nodes (YYY) but we need to run scan and database listener on port 1590 for ebiz application to talk to it.
But I suppose in cluster's services we can't have more than 1 scan listener.
So we propose this.
We create a new database listener running on port 1590
Scan listener keep running on 1580
We clone the database from XXX to YYY and then point local_listener to 1590 and remote listener to scan.
It will register itself and then on apps side we change the XML to point to Scan listener so it will be like this.
EBIZ running on port 8069 pointing to database running on 1580.

Answer 1

Hello all,
for "+why not simply add a second port to SCAN and db listener?+"
... because the fact that you can do that:
"+srvctl modficy scan_listener -p "1580,1590"+"
is considered a BUG (10633024), which means the ability to do so will go away in future (11.2.0.3).
Using SCAN with one TCP port and multiple listeners with respective ports should work just fine, if done right. For more information, see:
MOS Note 220970.1 – RAC: Frequently Asked Questions - entry: "How to use SCAN and node listeners with different ports?"
Hope that helps. Thanks,
Markus