Hi i 've a question is it possible to run 2 instances of an application on same server which uses same port .. , is it possible to do it with logical ip addresses ?
Assuming the application can bind itself to a specific IP address, that's very possible and a common configuration.
Alternatively, you can use Solaris zones.
[/COLOR]k this means if i want to run 2 oracle instances & respective listeners i have to use logical ips .. And we do not want to use solaris zones at this point of time.
With Oracle you won't need 2 different ports. The listener process is quite capable of serving multiple instance via the same port. You'll only need 2 different listeners (and thus 2 ports) if you plan on running more that 1 software version (eg. 9i and 10g).
That would be two different ports or two different IP addresses.
As far as I understand, listener.ora configuration file allow to bind a listener to a specific IP.