Multiple oracle versions on windows 2008 server.

We want to install multiple oracle versions on a windows 2008 x64 server. The versions are oracle 10 and 11 Enterprise. Can anyone tell us how we can do this? I guess it not as easy as just installing oracle 10 and 11. A colleague of mine tried it one time but had many problems with not reachable instances. What do we need to configure once the installation has completed.
bellidAsked:
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slightwv (䄆 Netminder) Commented:
You should be able to install them both.  Just use different ORACLE_HOME values.

If you could not 'reach' different instances it was likely a simple tnsname.ora issue.  You need to set the tnsnames.ora files up to see all the instances or set the TNS_NAMES environment variable to point to a 'master' tnsnames.ora file.
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bellidAuthor Commented:
How do i do this ( set the TNS_NAMES environment variable to point to a 'master' tnsnames.ora file.  )
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slightwv (䄆 Netminder) Commented:
Figure out what folder you want to store the master tnsnames.ora file.  Create the master tnsnames.ora file in that folder (and probably a sqlnet.ora file as well).

Point the TNS_ADMIN environment variable to that folder.


If you need to know how to set it the following link is for XP but I believe the steps are very similar:
http://support.microsoft.com/kb/310519

It also looks like you can set this in the registry for each ORACLE_HOME you have:
http://forums.oracle.com/forums/thread.jspa?threadID=375261

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bellidAuthor Commented:
sorry, i have asked the wrong question. I meant  how do i ( You need to set the tnsnames.ora files up to see all the instances )

is it possible to have just something like

D:\oracle\product\10.2.0\db_1\NETWORK\ADMIN
D:\oracle\product\11.01\db_1\NETWORK\ADMIN

where both version has there own sqlnet.ora en tnsnames.ora?
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slightwv (䄆 Netminder) Commented:
>>where both version has there own sqlnet.ora en tnsnames.ora?

Yes.  This is what you get when you run multiple homes on the same machine.  Two of everything.  It's normal.  You just need to understand what that means.

>>A colleague of mine tried it one time but had many problems with not reachable instances

Back to this issue, the problem was likely the 'unreachable' instances were not in the tnsnames.ora file you were pointing to.
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bellidAuthor Commented:
was not complete
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slightwv (䄆 Netminder) Commented:
What was 'not complete'?

If you required more information you should have asked.

It's also not nice to penalize me with a "B" when you just closed this out to avoid the new question lock.
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