Application Migration: Methodology & Process

Category
Upgrade & Migration
Author
Tarun

Application migration and re-engineering is a process performed by an IT expert for the sole purpose of migrating an organization’s existing environment to a newer, enhanced and more secure environment which may or may not be on the same platform as its predecessor.

This is why a well-designed, carefully crafted approach is necessary when considering application migration and re-engineering.

The transfer occurs after considering the pros and cons and carving a logical methodology and process. Some companies implement a 12-step program which follows as under:

  1. Assessment
  2. Database conversion
  3. Application conversion
  4. Script conversion
  5. Integration with third-party applications
  6. Data migration
  7. Functional testing
  8. Performance tuning
  9. Integration and deployment
  10. Training and knowledge transfer
  11. Documentation and version control
  12. Post production support

Since a typical migration project is complex in nature, it goes through several stages. Some of them are listed as under:

Migration Readiness Stage

  • Analyse the data environment, calculate risks and construct a business scenario.
  • Identify SMEs and stakeholders.
  • Plan for the destination server’s hardware and software capacity.
  • Define engagement model.

Migration Stage

  • Assess the existing database and design SQL Server database to provide the same functionality.
  • Construct a customized roadmap for migration based on the outlined business objectives.
  • Migrate database and verify database schema and validate whether the data migration was successful.

Extract, Transform, and Load Stage

  • Design and develop ETL packages for simultaneous data load from a previous database onto the new SQL server database.
  • Test data load performance.
  • Setup and validate security, monitoring and replication functions.
  • Validate data in SQL server database for technical accuracy and functionality.

Application Remediation Stage

  • Performance integration testing using those applications that were consuming data in the previous database and making necessary modifications to ensure they work in the new SQL Server.
  • Performance user acceptance testing
  • Training and knowledge transfer
  • Implement product environment
  • Post production support

Beyond this, is the phase of testing and validation strategy, and deciding migration options by a team of experts from JK Technosoft.

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