Question

A retail company is planning to migrate a large on-premises data warehouse and dozens of interdependent ETL jobs to Google Cloud. Leadership wants to minimize risk and avoid discovering unexpected integration issues late in the project. As the data engineer leading migration planning, what should you do FIRST before scheduling any workload cutover?

Accepted Answer

Perform a discovery and assessment phase that inventories data sources, catalogs job dependencies, and classifies workloads by complexity and business priority.

Answer

Provision BigQuery datasets and immediately begin lift-and-shift of all ETL jobs in a single batch to accelerate timelines.

Answer

Set up Cloud Interconnect and start a full one-time transfer of all historical data using Storage Transfer Service.

Answer

Rewrite every ETL pipeline in Dataflow using Apache Beam before moving any data to the cloud.