Having two oracle clients installed at the same time

Hi, I was wondering if there is a way to have two oracle clients installed at the same time on one computer, and if there is a way to be changing the default client between the two. I need to have installed the oracle client 10g and 8 versions on the same computer, because we have a problem with a legacy application that for some reason only works with version 8, and we need the 10g because our new applications requires 8.1 or later. We are still migrating to the new system but we developers need to have the two clients. Any help is appreciated. Thanks in advance.

Is it possible, sure.
Technically, clients before 8.1.5 were not multi-home compliant, so having Oracle 8 and Oracle 10g clients on the same machine is almost certainly not supported. On the other hand, I know that a number of developers at Oracle had combinations of Oracle 7 clients Oracle 8 clients, Oracle 8i clients, and Oracle 9i clients on their development machines at the same, so you shouldn't have too many major issues.
Most "default client" issues come down to which ORACLE_HOME is first in the system's PATH. Ideally, you would leave the Oracle 8 ORACLE_HOME first in the path and explicitly reference the 10g ORACLE_HOME when configuring anything that relies on the 10g client.
Justin

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