As part of your company's IT modernization efforts, you are transitioning your data warehouse from an on-premises data center to Google Cloud and subsequently decommissioning the physical infrastructure. Given the high priority of this task, adequate bandwidth has been allocated specifically for the initial bulk data transfer. The files earmarked for migration are relatively few but substantial in size, with each file being 90 GB. Furthermore, there's a need for your transactional systems to persistently update the Google Cloud warehouse in real time post-migration. What tools should be utilized to facilitate the data migration and to ensure continuous real-time data updates to the Google Cloud warehouse?