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Migrating delta data

Delta data refers to any data changes that occur on your current production Remedy system during a staged upgrade of the production system. You migrate delta data by using the Delta Data Migration tool after the upgrade of the platform, applications, and secondary servers is complete and the deployment package has been imported. The Delta Data Migration tool is installed as part of the BMC Remedy Migrator installation.

In this process, the source server refers to your current production server and the destination sever refers to your staging production server.

In this topic

Supported migration paths

The following table lists the earliest version from which you can migrate product data to the current version.

Product

Earliest supported version from which you can migrate data

BMC Remedy AR System

7.0.1

BMC Atrium Core

2.0.1

BMC Atrium Integrator8.0.00

BMC Remedy ITSM applications

7.0.02

BMC Service Request Management

2.2

BMC Service Level Management

7.1

BMC Remedy Knowledge Management

7.6.03

BMC Service Impact Manager

7.1

Integration for BMC Remedy Service Desk

7.1

BMC Process Designer8.3.03

BMC ProactiveNet Performance Management

8.5

Before you begin delta data migration

Important

When you migrate data from version 9.1 and later, the Delta Data Migration utility does not migrate data for CTM:People and User forms because the encryption format for AR password (encrypted data) fields is changed.

If the Delta Data Utility migrates the data and overwrites the password field data, you need to manually fix the password.

For more information, see Migrating User form and CTM:People form data

Preparing for the delta data migration

First review the Overview of the Delta Data Migration tool and then perform the following steps to prepare your environment for migrating delta data as part of a staged upgrade.

TaskActionAdditional information
1.Configure the Delta Data Migration tool prior to running DDMConfigure the PATH environment variable and count settings to improve the performance of your data migration.
2.Perform server configuration adjustments 

For staged upgrade environments. you must perform the Server and DB configuration settings to improve the performance of the DDM tool. You perform these configuration adjustments on the source server (current production server) and the destination server (staging server) at various points within the delta data migration process.

After the final DDM run is complete, you will revert the previous changes to their original state.

3.Search for additional data changes

You must now run the utility to search for any additional data that  might have been created from the time you backed up your data and set up the staged environment.

Note: Do not start the data migration before you have identified and resolved any possible data conflict or data integrity issues with the additional data.

4.Estimate your data volume and plan your DDM runs by using the AREntryCounter utilityUse the AREntryCounterUtlity to estimate the total data volume for you migration and plan your DDM runs. The utility counts the number of entries in the forms that are part of a DDM package.
5.Perform migration prechecksAt this stage, you already have determined the volume of your data and planned the DDM. Perform prechecks before you start your migration to resolve issues that might be applicable to you.
6.Extend delta data migration to include customizationsAdd custom forms to the DDM package and migrate the data for these custom forms.
7.Deleting orphan recordsDuring the delta period, if you changed the login ID, support group association, permissions groups, or the functional role for your users on the current production server, perform the steps explained in the topic.
8.

(optional) Plan your migration for the backend and custom forms

If your custom or backend forms have a large amount of data, use SQL to migrate data for the initial batch of data, and then use DDM for the subsequent runs.
9.(optional) Migrating archived data(Version 9.0 or later only on the source server) Perform this task if you want to also migrate your archived data.

Performing delta data migration

Perform the following steps to run the delta data migration (DDM) as part of a staged upgrade.

TaskActionAdditional information
1.Perform the data migration for the first time

Run the data migration for the first time immediately after your upgrade is complete.

2.Review the migration results and resolve issues

After you complete the data migration, review the migration results for issues and resolve as required. You must re-run DDM for the same product selection and date range, if you encountered any errors in your DDM run.

To successfully complete the data migration, you must rerun the DDM until no errors are generated for that date range. Do not proceed with the migration for the next date range until the previous date range data is successfully migrated without any errors.

3.

Deleting orphan records after delta data migration

If you first DDM run completed with errors on one or more of the following forms, you must search for and delete the orphaned records as explained in the procedure:

  • CFG:BroadcastHistory
  • CTM:People Permission Groups
  • CTM:SupportGroupFunctionalRole
  • CTM:Support Group Association
  • AST:Asset People
4.Perform the data migration until you go live
To keep up with the data differences, run DDM every day after the you upgrade on the staging server.

On the day that you freeze for go live, run DDM every two to three hours prior to the outage so that the final DDM run can complete in less than an hour when the freeze starts. For a complete list of cutover activities, see Cutover activities for staged upgrade.

5.Validate count of data after every DDM run After every DDM run, use the utility on the source and destination servers for the specific data range to validate the counts.

After you complete delta data migration

After you run the final DDM and the perform cutover activities for a staged upgrade, perform the postmigration activities on the production staging server during the cutover window. Ensure that you perform these postmigration tasks before you go live in the final step of the staged upgrade.

Where to go from here

Next task

Start with Configuring the Delta Data Migration tool.

Up to process

When you have finished migrating delta data, return to the Remedy ITSM Suite staged upgrade process.

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