Using the preprocessing upgrade state transfer tool:
The preprocessing upgrade state transfer tool helps you minimize downtime during upgrade. The tool also helps you avoid putting an additional load on your production Microsoft Dynamics AX system while you prepare to upgrade it. This Post describes how to create a test system that is a replica of your production system, perform data preprocessing on the test system, and then transfer the completed preprocessing state back to the production system.
How the State Transfer Tool Works:
The state transfer tool operates on a Microsoft Dynamics AX source system where some of the tasks of the Preprocessing upgrade checklist have been completed. The tool analyzes the code in the upgrade preprocessing project to identify the upgrade staging and framework tables that are required to capture the state of the Preprocessing upgrade checklist. The tool then uses the Microsoft SQL Server Bulk Copy Program (BCP) utility to copy these tables to a second Microsoft Dynamics AX source system. During bulk copy, you can add processor threads to improve data throughput.
Note: Do not modify the data on your production Microsoft Dynamics AX system by loading the results of the state transfer tool until you have repeatedly and successfully tested this procedure on a non-production test system.
Prepare to Perform a State Transfer:
Before you perform a state transfer, you must complete the following tasks on the test and production source systems.
Prepare the production system:
- On the production system, import the preprocessing XPO that is appropriate for the Microsoft Dynamics AX version that you are upgrading. For more information, see the Microsoft Dynamics AX 2012 Upgrade Guide (http://go.microsoft.com/fwlink/?LinkId=212541).
- On the production system, install the upgrade-related label file (.ald) files. Also install the upgrade-related Help files (.chm) files. For more information, see the Microsoft Dynamics AX 2012 Upgrade Guide (http://go.microsoft.com/fwlink/?LinkId=212541).
- On the Preprocessing upgrade checklist, complete the Check upgrade readiness task and resolve any validation errors. Enable triggers to track necessary data, based on prompts from the upgrade readiness checks. For more information about this step, see Check upgrade readiness.
- The test system must be an exact replica of the production system. Copy the USR layer (.aod) file on the production system, and back up the production system database:
- Copy the USR layer (.aod) file. Typically, this file is located at C:\Program Files (x86)\Microsoft Dynamics AX\40\Application\<application instance>\axusr.aod or C:\Program Files\Microsoft Dynamics AX\50\Application\<application instance>\axusr.aod. Have this file available for installation on the test system.
- Use Microsoft SQL Server Management Studio to back up the Microsoft Dynamics AX database. Have this backup file available for installation on the test system.
**After you copy the USR layer and make backup of the database, you must avoid making changes to the application on your production system. Data transactions may continue (allowing continued business operations), but metadata changes, customizations, changes to the AOT, and anything that changes the behavior of the application can cause the state transfer to fail.
Prepare the Test system:
The following steps produce a test source system that is configured identically to the production source system.
Do not import the upgrade XPO into the test source system. The necessary upgrade framework code is provided in the AOD file that you copied from the production source system. Importing the XPO overwrites element IDs and causes runtime errors.
- Install the upgrade-related label files (.ald) files. Also install the upgrade-related Help (.chm) files. For more information, see the Microsoft Dynamics AX 2012 Upgrade Guide (http://go.microsoft.com/fwlink/?LinkId=212541).
- Install the USR layer (.aod) file that you copied from the production system. Typically, this file is installed at C:\Program Files (x86)\Microsoft Dynamics AX\40\Application\Appl\Standard\axusr.aod or C:\Program Files\Microsoft Dynamics AX\50\Application\Appl\DynamicsAX5\axusr.aod.
- Use SQL Server Management Studio to restore the database backup from the production system as the Microsoft Dynamics AX database on the test system.
After you complete these steps, you must restart Application Object Server (AOS).
The test source system is now ready for upgrade preprocessing. It is recommend that you complete the following tasks on the Preprocessing upgrade checklist:
- All tasks in the Prepare application data for preprocessing section
- Run live preprocessing scripts
- Run delta preprocessing scripts
Enable the database Connection:
Windows integrated security is used to connect to the production source system from the test source system. The administrative user who is performing the state transfer must have access to the Microsoft Dynamics AX database on the production source system. Otherwise, the production source system rejects the database connection. Open SQL Server Management Studio on the production source system, and follow these steps:
- Grant access to the Microsoft Dynamics AX database to a domain user who has administrative privileges on the test source system.
- Add this user to the db_owner and public database roles.
Open the Preprocessing Upgrade State Transfer form:
After you have completed upgrade preprocessing on the test system, open the Preprocessing upgrade state transfer form on the production system. The form is opened from a private project that is installed by the preprocessing framework XPO.
- Click the Project icon on the Microsoft Dynamics AX 4.0 or Microsoft Dynamics AX 2009 toolbar.
- Expand Private.
- Double-click xferUpgState (usr).
- Scroll down to xferUpgState (usr), right-click, and then click Open.
Perform The State Transfer:
- In the Server name field, enter the name of the test system.
- In the Database name field, enter the name of the Microsoft Dynamics AX database for the test system.
- Click Run to start the upgrade state transfer. The state transfer tool validates conditions in both the test system and the production system. If no errors are found, the tool schedules batch jobs to bulk copy all shadow, dictionary, auxiliary, and framework tables from the test source system to the production source system.
A form opens so that you can monitor and manage the bulk copy process. The form is called Batch list in Microsoft Dynamics AX 4.0 and Batch tasks in Microsoft Dynamics AX 2009. You can use the form to pause or rerun jobs if you have to.
Note: To use the state transfer tool, you must enable administrative user access between the test and production systems by using Windows integrated security.
Perform Post Transfer Tasks:
After the state transfer is complete, perform the following tasks.
- Open the Preprocessing upgrade checklist and rerun the tasks in the section Prepare application data for preprocessing. This will allow you to make manual adjustments to new data from the delta between production system backup and completion of the state transfer.
- The only tables that this tool copies over are those that are imported as part of the preprocessing XPO – hence, no production data is copied over from the test system back into production. As a result, you must manually synchronize the data in two number sequence tables on the production system, as shown:
To do this, check the next value and maximum value for each of these number sequences in the test environment and transfer those values manually to the corresponding tables in the production environment. Subsequent scripts in the upgrade process that use these number sequences will pick up the correct values when they are executed.
Finally, run the delta preprocessing scripts, and then continue with upgrade preprocessing in single-user mode.