Both the listener can be run without any issues. However 10g instance/database must use 10g listener as it will not work with 9i listener. The better way to move 9i instances to 10g listener as well. Regards Rafiq > Date: Wed, 2 Apr 2008 09:46:34 -0500> From: dannorris@xxxxxxxxxxxxx> To: > tony@xxxxxxxxxxxxxxx> CC: oracle-l@xxxxxxxxxxxxx> Subject: Re: Multiple > listeners (9i/10g) on Windows> > Tony,> > I don't think you'll have name > clashes. The 10g database on Windows here > prefixes the service name with > the Oracle Home Name. So, the 10g > listener service name is > "OraHome1TNSListener" and that shouldn't clash > with the 9i service name. I > can't remember if 9i prefixed the listener > service name with the Oracle > Home name or not--don't have one of those > to verify right now. Regardless, > I'd still recommend using a different > listener name just to avoid confusion > about which LISTENER you're > working with.> > I don't think there's any risk > either since if you do "lsnrctl start > LIST10G" and the service is already > there and started, you won't be able > to start it again. If the service > doesn't exist, the service will be > created and started.> > Dan> > Tony > Sequeira wrote:> > Thanks Dan,> >> > Thanks for your comments.> >> > If I do > decide to use the 10g listener for both instances, won't there> > will be a > service name clash, unless of course I use a different> > listener name? I > would have to remove the 9i service prior to creating> > the 10g service, am > I wrong here?> >> > > --> //www.freelists.org/webpage/oracle-l> > _________________________________________________________________ Going green? See the top 12 foods to eat organic. http://green.msn.com/galleries/photos/photos.aspx?gid=164&ocid=T003MSN51N1653A