How to install/upgrade Ultrasearch for AS Middle Tier 10.1.2.0.2? DB 9208.

Question

Hi,
I am trying to understand the Ultrasearch from the point of view of my 10.1.2.0.2 middle tier. Here is my environment:
Our Metadata Repository and Portal Repository (Customer) databases are version 9.2.0.8. Recently patched to 9.2.0.8 from 9.2.0.7.
Our Infrastructure & Middle Tiers have been recently upgraded to version 10.1.2.0.2 from version 9.0.4.1.
Both the repository databases and the Infra and Mid tiers have their own Oracle Homes.
From what I read, Ultrasearch is installed by default with an Oracle Database. It is also available with Oracle Application Server.
With the version of Ultrasearch coming with our 10.1.2.0.2 AS being a later version than the one that came with the Database, I am trying to figure out how to install the correct Ultrasearch in our Customer (or Metadata ?) database.
The iasua.log from our middle tier upgrade says:
============================================================================
2009/07/16 12:27:20.478 PDT NOTIFICATION:1 Framework: Starting to examine UltraSearch.
2009/07/16 12:27:20.478 PDT NOTIFICATION:1 Framework: Finished examining UltraSearch with status: Success.
2009/07/16 12:52:41.587 PDT NOTIFICATION:1 Framework: Starting to examine UltraSearch.
2009/07/16 12:52:41.587 PDT NOTIFICATION:1 Framework: Finished examining UltraSearch with status: Success.
2009/07/19 19:08:28.616 PDT NOTIFICATION:1 Framework: Starting to examine UltraSearch.
2009/07/19 19:08:28.616 PDT NOTIFICATION:1 Framework: Finished examining UltraSearch with status: Success.
2009/07/19 19:12:25.560 PDT NOTIFICATION:1 Framework: Starting to upgrade UltraSearch.
2009/07/19 19:12:25.579 PDT NOTIFICATION:1 Framework: Finished upgrading UltraSearch with status: Success.
============================================================================
But during the Metadata Repository Upgrade using MRUA, I saw the following error:
============================================================================
Calling upgrade plugin for ULTRASEARCH
Error: Component upgrade failed ULTRASEARCH
============================================================================
I can connect to the Ultrasearch Admin tool from the Application Server Console middle tier => portal page, and I see there that the version is 10.1.0.4.2. Ultrasearch has never been setup previously with our 904 environment. I see the WK_TEST default instance there that I can navigate around. My question is, how do I check and confirm that Ultrasearch has been installed correctly for my Application Server?
If I have to install a new version of Ultrasearch, what are the installation steps? Does Ultrasearch always use the Metadata repository database? Or can it be configured to use a customer database? I don't see a WKSYS schema in our Portal database. WKSYS exists only in our MR database.
As per the APP_REGISTRY in our MR database, the Ultrasearch component is version 9.2.0.8.0 and is INVALID.
I believe that Ultrasearch was an option prior to 10.1.2+ releases, but is required with the recent releases. Correct me if I am wrong.
I think Ultrasearch is installed for our AS environment. I don't know if it is valid.
Any help would be appreciated. I just need to confirm that I am good to go, to proceed and upgrade our Portal to version 10.1.4.
Thanks.
CV

Answer 1

Figured out that Ultrasearch was installed as a part of the Middle Tier install and was upgraded successfully during the Middle Tier upgrade.
Thanks.
CV