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Assess the current state of the system/application to be migrated.

Identify dependencies, risks, and constraints.

Evaluate the scope and objectives of the migration.

Gather requirements and define success criteria.

Determine the desired outcome of the migration

Develop a detailed migration plan based on the assessment.

Define roles and responsibilities for team members involved in the migration.

Create a timeline and set milestones for the migration process.

Allocate resources (human, financial, technological) required for the migration.

Identify potential challenges and develop contingency plans.

Prepare the target environment for migration.

Ensure necessary infrastructure is in place.

Set up tools and systems for monitoring and managing the migration process.

Communicate the migration plan and schedule to stakeholders.

Conduct training sessions for the migration team, if necessary.

Perform any prerequisite tasks such as backups, data cleansing, or environment setup.

The Schema Migration Phase involves transferring the database structure from Oracle to PostgreSQL while ensuring compatibility and integrity.

This phase includes analysing the Oracle schema, mapping it to PostgreSQL equivalents, generating DDL scripts, converting data types, migrating constraints and indexes, translating views, stored procedures, and triggers.

Validate schema changes against the target environment.

Test schema migration processes to ensure data consistency.

The Data Migration Phase involves transferring data from Oracle databases to PostgreSQL while ensuring accuracy, integrity, and consistency.

This phase includes extracting data from Oracle databases, transforming it into a format compatible with PostgreSQL, loading it into the target PostgreSQL databases, and validating the migrated data to ensure completeness and correctness.

Migrate application codebase to the target environment.

Update code dependencies and configurations as needed.

Test application functionality in the new environment.

Address any compatibility issues or bugs encountered during migration.

Ensure seamless integration with other systems or components.

Conduct comprehensive testing of the migrated system/application.

Perform functional testing to validate that all features work as expected.

Execute performance testing to assess system efficiency and scalability.

Carry out compatibility testing to ensure compatibility with different platforms and browsers.

Validate security measures and protocols in the migrated environment.

Plan and execute the final deployment of the migrated system/application.

Monitor deployment processes to ensure smooth transition.

Verify that all components are properly deployed and configured.

Conduct post-deployment testing to confirm system stability and functionality.

Conduct post-migration reviews to evaluate the success of the migration.

Gather feedback from users and stakeholders.

Identify areas for improvement and optimization.

Documenting all the steps taken during Migration.

Provide ongoing support for the migrated system/application.

Monitor performance and address any issues or bugs that arise.

Perform regular maintenance tasks such as updates, patches, and backups.

Continuously optimize the system for better performance and efficiency.