Migrate the WebSphere Commerce Version 8 offline database

Before we can migrate your live WebSphere Commerce Version 8 database to the WebSphere Commerce Version 9 environment, migrate an offline version of the WebSphere Commerce Version 8 database, so we can perform the necessary testing of your migrated WebSphere Commerce Version 8 assets. The offline WebSphere Commerce Version 8 database is the WebSphere Commerce Version 8 database that you restored to the WebSphere Commerce Version 9 environment.

The following diagram depicts the database migration flow.


Before beginning


Task info

Before migrating the offline database, run the premigration check to show any issues with the database that might cause errors during the migration. Correct any issues to ensure that the database migration completes successfully.


Procedure

  1. Run the premigration database check.

    1. Run docker ps to verify that the containers are running.

    2. Locate the utility container name in the NAMES column. For example, myproject_utils_1.

    3. Start a bash shell.with the utility container name.

      • docker exec -it <utility_container_name> bash

    4. Go to the bin directory.

      • cd /opt/WebSphere/CommerceServer90/bin

    5. Check the database.

      • wcim_ant.sh -tier db -action check -from 80 -instanceName instance_name -isStaging true|false [-defaultTablespace yes | no] [-logLevel Error | Warning | Info | Verbose | Debug]

      Where:

        tier
        Specifies the tier of the WebSphere Commerce topology that we are migrating. The only available option is db.

        action
        Specifies the action to perform when the command runs. The supported actions are as follows:

          check
          Runs the database premigration checker to check the status of the database before you migrate it. Run the database premigration checker before you migrate the database.

        from
        Specifies the version of the WebSphere Commerce database from which we are migrating. The only available option is 80.

        instanceName
        Specifies the name of the WebSphere Commerce Version 8 instance.

        isStaging
        Specifies whether we are checking the staging database.

          true
          You are checking a staging database.

          false
          You are not checking a staging database.

        defaultTablespace
        Optional: Specifies whether to use a default table space for the database.

          yes
          Sets a default table space.

          no
          A non-default table space can be used. You are prompted to pass a table space name later in the migration.

        logLevel
        Optional: Specifies the amount of information about the database tier migration that is logged. The valid log levels are as follows:

          Error
          Only error messages are logged.

          Warning
          All warning and error messages are logged.

          Info
          All error, warning, and event messages are logged.

          Verbose
          All errors, events, and other information are logged, including all SQL statement information. It requires 1-2 MB of storage for most migrations. Verbose is set by default.

          Debug
          Similar to the Verbose option, but includes some additional debug information. This value is helpful if you encounter errors and need to debug them. It requires 1-2 MB of storage for most migrations.

      The following snippet is an example of the database check interactions: 

        /opt/WebSphere/CommerceServer90/bin>wcim_ant.sh -tier db -action check -from 80 -instanceName demo -isStaging true -logLevel Verbose
Database type? 
db2

Database name?
mall

Is the database backup completed? [ Yes ] (Yes,No,)
Yes

Is the database restore completed? [ Yes ] (Yes,No,)
Yes

      When the check completes successfully, you see the following message: 

        INFO:   WCIM has completed the job(s) successfully.

    6. If the database check fails, review the following log file: WC_installdir/logs/WCIM/wcim.server.yyyy.mm.dd_hh.mm.ss.log. Address the failure message, and rerun the database check.

  2. Migrate the database.

    1. Open a new command prompt, or use the same prompt that we used to run the database check.

    2. Migrate the database.from the utility container:

      • wcim_ant.sh -tier db -action migrate -from 80 -instanceName instance_name -isStaging true|false [-defaultTablespace yes | no] [-logLevel Error | Warning | Info | Verbose | Debug]

      Where:

        tier
        Specifies the tier of the WebSphere Commerce topology that we are migrating. The only available option is db.

        action
        Specifies the action to perform when the command runs. The supported actions are as follows:

          migrate
          Migrates the database to WebSphere Commerce Version 9.

        from
        Specifies the version of the WebSphere Commerce database from which we are migrating. The only available option is 80.

        instanceName
        Specifies the name of the WebSphere Commerce Version 8 instance.

        isStaging
        Specifies whether we are checking the staging database.

          true
          You are checking a staging database.

          false
          You are not checking a staging database.

        defaultTablespace
        Optional: Specifies whether to use a default table space for the database.

          yes
          Sets a default table space.

          no
          A non-default table space can be used. You are prompted to pass a table space name later in the migration.

        logLevel
        Optional: Specifies the amount of information about the database tier migration that is logged. The valid log levels are as follows:

          Error
          Only error messages are logged.

          Warning
          All warning and error messages are logged.

          Info
          All error, warning, and event messages are logged.

          Verbose
          All errors, events, and other information are logged, including all SQL statement information. It requires 1-2 MB of storage for most migrations. Verbose is set by default.

          Debug
          Similar to the Verbose option, but includes some additional debug information. This value is helpful if you encounter errors and need to debug them. It requires 1-2 MB of storage for most migrations.

      The following snippet is an example of how to run the database migration check: 

        /opt/WebSphere/CommerceServer90/bin>wcim_ant.sh -tier db -action migrate -from 80 -instanceName demo -isStaging true -logLevel Verbose
Database type? 
db2 

Database name?
mall

Is the database backup completed? [ Yes ] (Yes,No,)
Yes

Is the database restore completed? [ Yes ] (Yes,No,)
Yes

      When the database migration completes successfully, you see the following message: 

        INFO:   WCIM has completed the job(s) successfully.

    3. If the database migration fails, review and correct any errors that might be found in the following log file: /opt/WebSphere/CommerceServer90/logs/WCIM/wcim.server.yyyy.mm.dd_hh.mm.ss.log.

      Note: If the database migration fails while it enables content versioning, you need to restore the database before you rerun the migration. To determine whether the migration failed while it enabled content versioning, review the /opt/WebSphere/CommerceServer90/logs/WCIM/wcim.server.yyyy.mm.dd_hh.mm.ss.log file and the /opt/WebSphere/CommerceServer90/logs/content.version.update.messages_yyyy.mm.dd_hh.mm.ss.log file. Check the logs to see whether the failure occurs while it runs the createVersion task from the configureContentVersionComponent.xml file.

    4. After the migration completes successfully, review any warnings in the /opt/WebSphere/CommerceServer90/logs/WCIM/wcim.server.yyyy.mm.dd_hh.mm.ss.log, and then determine whether any actions are needed.

  1. Complete the offline database migration.
    After you successfully migrate the database, complete the final database migration tasks.

Previous topic: Prepare the environment for migration.
Next topic: Migrate your live database.