Migrate an on-premises Redis database to Memorystore for Redis with minimal cost, time, and effort. What is the recommended approach?

The recommended approach for migrating an on-premises Redis database to Memorystore for Redis with minimal cost, time, and effort is to use an RDB backup. Redis's RDB persistence creates a point-in-time snapshot of the dataset. This RDB file can be easily copied to Google Cloud Storage using gsutil and then directly imported into a new Memorystore for Redis instance. This method is efficient because it leverages Redis's native backup format and Memorystore's built-in import functionality, avoiding complex data transformations or custom code. Creating a secondary instance on Compute Engine and performing a live cutover is more complex and incurs additional compute costs. A Dataflow job would require significant development effort to create and manage, increasing both time and cost. Writing a custom shell script is also prone to errors, time-consuming, and less robust than using native backup/restore mechanisms.