Data Migration Testing

What Is Data Migration Testing?


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Data Migration Testing

Data Migration testing is a confirmation process of migration of the legacy system to the new system with minimal disruption, data integrity, and no data loss, ensuring that all the specified functional and non-functional aspects of the application are met post-migration.

Why Migration Testing?

As we all know, the application migration to a new system can be for various reasons, system consolidations, obsolete technology, optimization, or any other reasons. As all the system in user requirements are to be migrated to a new system, it becomes essential to ensure the points below:

  1. Any disruption or inconvenience caused to the user because of migration needs should be avoided.
  2. Requirement for ensuring if the user could continue to use all the software features by causing minimal or no damage during migration.
  3. It is also essential for anticipating and drooling out all the possible glitches that might occur during live systems’ actual migration.

Hence, to ensure a smooth migration of the life system by eliminating those defects, it becomes essential for carrying out data migration testing in the lab. Migration testing has its significance and plays an essential role when the data comes into the picture. Technically it should be executed for the below purposes:

  1. For ensuring compatibility of the newly upgraded application with all possible hard bass and soft ways that The legacy application supports. Also, you should test new compatibility for new hardware and software platforms as well.
  2. Ensuring that all the existing functionality works as in the legacy application. There should be no change in how the application is working compared to the legacy one.
  3. The possibility of a large number of defects because of migration is very high. The majority of the defects will usually be related to data, and hence these effects should be identified and fixed during testing.
  4. Ensuring whether the new or updated application system response time is the same or less than what it takes to the legacy application.
  5. Ensuring the connection between servers, hardware and software are interacting and not breaking while testing. The data flow between different components should not break under any circumstances.

Also Read: Data Migration Testing And Its Techniques?

When is Migration Testing Required?

Testing should be performed both before and after migration. The different phases of migration testing to be carried out at the test lab could be classified as below:

  1. Pre-migration testing
  2. Migration testing
  3. Post-migration testing

The following test should also be executed as a part of the entire migration activity and the above tests.

  1. Backward compatibility verification
  2. Rollback testing

Any testers need to understand the points stated below before performing this testing. The changes are occurring as a part of the new system. For understanding the actual migration strategy laid out by the team. How migration is happening, step-by-step changes in the system’s battle, and the script responsible for these changes. Hence, it becomes crucial to study the old and new systems and then accordingly plan and design test cases and test scenarios to be covered as a part of the above testing phases and prepare the testing strategy.

Data Migration Testing Strategy

Planning the test strategy for migration includes some set of activities to be performed and a few aspects to be considered. It is for minimizing the errors and risks that occur due to migration and for performing data migration testing effectively.

Activities in migration testing

1. Specialized team formation:

Forming the testing team with members having the required knowledge and experience and providing training related to the system that is being migrated.

2. Possible errors analysis, business risk analysis:

The present business should not be hindered after relocation. The ‘business risk analysis’ meetings should be held, and risk and avoidance should be identified with the appropriate stakeholders (Test management, Business Analyst, architects, product owners, business managers, etc.). The evaluation should include simulations to detect the risks and check for the correct mitigation. Do “Possible Fehler Analysis” using suitable ‘Feedback Approaches’ and subsequently design experiments to detect these errors during the test.

3. Analysis and identification of migration scope: 

Analyze the clear scope of the migration test as to where and when to test.

4. Define the right migration tool: 

Identify the methods to be used during the definition of the technique for this test, automatically or manually. e.g., Automated source and destination data comparison tool.

5. Identify the relevant migration evaluation environment:

Identify separate pre- and post-migrant atmosphere conditions for carrying out any research needed. Understand and log the legacy and the new migration scheme’s technological elements to ensure that the research framework is developed accordingly.

6. Migration Test Specification Document and review: 

Prepare migration test specification document that describes clearly the test method, test areas (automated and manual methods), test methodologies (black box, test technology for white box), number of test cycles, the test scheduling schedule, the method of data creation, and live data use (sensitive info to mask), test enviro Migration testing

7. Migrated device launch: 

To-do list for output migration analyses and log and post far ahead of time.

Tips to Smoothen the Data Migration Risks

Below are a few tips to be taken to alleviate the danger of data migration:

  1. Standardize legacy device data to make modern data accessible in new systems as transferred standard data
  2. Improving the data’s consistency to offer a qualitative feeling of testing as and when an end consumer migrated
  3. Re-clean the data before migration, while avoiding the presence of redundant data in the new system as transferred.
  4. Review the limitations, saved protocols, dynamic queries that provide reliable answers such that valid data is indeed returned to the current system when migrated.
  5. To conduct data inspection and report inspections in a modern framework, identify the right automation tool in addition to the legacy.


Given the difficulty of the tests for migration results, it is very critical that the method should be thoroughly and thoroughly studied and analyzed before and after migration, where any part of testing is missed. The possibility of migration failure at the manufacturing site is often considered. Plan and plan an efficient migration approach alongside qualified and qualified testers using the comprehensive software. As we know that migration has an enormous effect on application efficiency, the whole team needs to work hard to monitor the whole system, even in all respects, such as accessibility, efficiency, protection, responsiveness, availability, reliability, compatibility, etc.

Also Read: Boosting Your Business With Data Migration Testing & Services

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