R12 Upgrade - Overview and Planning.

In this post we will be have an overview of an R12 upgrade. We will also be planning the activities, which one has to take before he/she prepares for an upgrade.

Upgrade Path:--
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Identifying a proper upgrade path very essential, while performing an upgrade. As of now, upgrade to R12 is supported only for the following Oracle Applications release 11.5.7, 11.5.8, 11.5.9 (base, CU1, CU2) and 11.5.10 (base, CU1, CU2).

If you are at Oracle Applications 11.0.3 or Oracle Applications 11.5.1 - 11.5.6, you need to first come to 11.5.10 and then proceed towards R12.

If you are Oracle Applications 11.5.7 - 11.5.10, you can directly upgrade to R12.


Database Upgrade:--
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In the process of Upgrading to R12, you will have to migrate/upgrade your database to Oracle 10g Database 2 (10.2.0.2).

If you are at 11.5.9 CU2 and 11.5.10 CU2, then you can upgrade your database before your Oracle Applications upgrade. If you are at 11.5.7, 11.5.8, 11.5.9 base, 11.5.9 CU1, 11.5.10 base, 11.5.10 CU1, then you need to upgrade your database during your Oracle Applications upgrade.


In general an R12 upgrade would involve the following section:--
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1. Planning the upgrade.

This post is particularly for this section.

2. Perparing the upgrade.

This section consists of steps, which needs to be performed as a pre-upgrade tasks like; applying the AD patchset, generating the TUMS report, running rapid install to lay the new techstack etc.

3. Upgrading to R12.

This sections of steps like; upgrading the database (if it was not done earlier), running the upgrade patch driver (u4440000.drv), etc.

4. Post-upgrade tasks.

This section consists of steps, which need to be performed to complete the upgrade and to prepare the instance for user logon.

Note, there will be functional steps which has to be performed after the upgrade, which the functional people must perform.

(This as well as all the other sections, will be covered in detail in the next few days.)