What are migrations used for?

Why is migration done?

People migrate for many different reasons. These reasons can be classified as economic, social, political or environmental: economic migration - moving to find work or follow a particular career path. social migration - moving somewhere for a better quality of life or to be closer to family or friends.

Which is used to migrate data?

Rsync is a data migration tool for transferring data across computer systems efficiently. It migrates data based on the time stamp and file size.

What is the purpose of schema migrations?

Schema migration allows for fixing mistakes and adapting the data as requirements change. They are an essential part of software evolution, especially in agile environments (see below). Applying a schema migration to a production database is always a risk. Development and test databases tend to be smaller and cleaner.

When should you run db migrations?

Run the database migrations first, before you deploy the new code. This means the before code must work with both database schemas, but the after code can assume that the tables have already been added.