🗺️ Exploring Database Migration: An In-Depth Handbook

Have you ever encountered the task of developing a new service for an established monolithic application? Or perhaps you’ve faced the challenge of migrating a sizable legacy database? If so, this blog aims to provide you with high-level guidance on best practices to follow. Join us as we delve into strategies to tackle these scenarios effectively.

What is data base migration anyways ?

Database migration is the process of transferring data from one database system to another or from one version of a database to another version. It’s a critical operation in software development and maintenance, and it requires careful planning and execution to ensure data integrity and minimal downtime.Below are several steps you can take to ensure a seamless and efficient execution of this process :

Proper planning :

Undertstand your data , how critical it is to deal with those. Figure out which teams or services would be impacted with a minimal downtime. Ensure all data is cleansed and fit for use, systems are optimized, and teams are familiar with the migration tools.
Identify the target database system and its requirements.Define the scope, timeline, and goals of the migration project.

Backup and Recovery:

Back up your data before the migration starts to prevent data loss.Ensure backups are on separate and highly secure systems. Also Implement a rollback plan in case the migration process encounters any issues.

Migration Strategy:

Choose the appropriate migration method based on factors like database size, transaction volume, acceptable downtime, and team proficiency with tools
Consider the following migration methods:

One-time migration (full load): Suitable for small databases or proof-of-concept pilots.

Continuous replication (log shipping and transactional replication): Ideal for large, frequently changing databases or those with strict uptime requirements

Continuous Testing and Monitoring:

Implement testing and monitoring to ensure the migration process is progressing smoothly and to quickly identify and address any issues that arise

This provides a high-level overview of how to approach database migration. For more detailed information, I have attached some references that you can follow.

https://www.striim.com/blog/an-introduction-to-database-migration-strategy-and-best-practices/
https://www.techrepublic.com/article/data-migration-best-practices/
https://aws.amazon.com/blogs/database/strategies-and-best-practices-for-very-large-database-migrations-into-amazon-rds-for-oracle/