Running TimesTen and 9i together

The application I'm running has lots of reads from some tables and fewer writes on other tables.
I'm running a C++ code that works with Oracle 9i. I want to use the cache connect option to cache some of my tables but to do all the writing to the database (different tables).
I'm connecting using OTL to the oracle and what I couldn't figure out is if I need to do any code changes. If so, how can I support both the connection to the 9i and the TimesTen and what are the minimum changes that are required.
Help will be highly appreciated.
Thanks,
Amnon
Message was edited by:
user616300

If my understanding is correct, your requirement is that you want to cache the frequently used Oracle tables which are read only in TimesTen; but you also need to update tables which only exist in the Oracle database.
If so, there are a couple of ways to do this:
1. Your application can establish and maintain two separate database connections, one (ODBC/JDBC) to TimesTen for accessing the readonly tables and another (SQL*Net) to update the Oracle tables.
2. Use the Cache Connect PASSTHROUGH feature in TimesTen, which allows you to send SQL requests for non-cached data directly to the backend Oracle database.
Using the 2nd approach means that your application only need to provide connections to TimesTen, and TimesTen will spawn and manage the connection to the Oracle backend database. In terms of performance the 1st approach will always be the best, since the Oracle UPDATE statements do not need to go via TimesTen.
Regards
Simon

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