Hi Sujan,
Ok to take it from the top.
You have an existing Cognos 8.3 installation currently running on the server and is this working ok with no issues? You also want to install a new Cognos 8.4 installation on the same server and operate both in parallel.
Will the new installation be a fresh copy with no content or do you want the 8.4 version to also contain the same content held in the 8.3 server, albeit upgrade to 8.4?
Depending on what you want to do the install steps will be slightly different. I’ve presumed it’s a fresh install
1. Install the gateway, application and content manager components into a new directory. Make sure you have a TEMP system variable that points to temporary location and you have admin rights on the server.
2. Create a new set of virtual directories to point to the physical directories just installed.
3. If this is a fresh install, then create a new content store database in SQL Server making sure you follow the guidelines in the Installation and configuration guide on collation sequences, character encoding etc. Also make sure that the database user account that Cognos will use to access the content store has the required rights to create the relevant tables.
4. In Cognos configuration change the ports e.g. change the URI ports to 9700 instead of the default 9300. Also remember to change the shutdown and logging ports to something different. The logging port is found in the logging section and the shutdown port you can change by clicking on the service name.
5. To be on the safe side, in the section IBM Cognos 8 Service rename the service to be something different from your existing 8.3 service.
6. Configure and test access to your content store.
7. For simplicity, I would leave the mail server and authentication as is for now.
8.Save and start the configuration.
If it doesn’t start then look in the cogserver.log to see what the specific error messages are and troubleshoot from there. The troubleshooting section in the Installation and Configuration guide may help you in that respect.
A link to the guide is posted below.
http://publib.boulder.ibm.com/infocenter/c8bi/v8r4m0/index.jsp Hope this helps
Kind Regards