The redesigning approach is most complex but provides maximum benefit. You can choose this approach if the legacy system is completely outdated and is not able to accommodate business needs at all. With redesigning, you need to build the entire system from scratch while keeping the overall scope intact. The following diagram shows the legacy mainframe system migration to AWS Cloud:

Here, a legacy mainframe system is rearchitected and refactored to similar cloud services as a modernization approach. Building a cloud-native application helps you utilize and fully benefit from cloud services in aspects of scalability, performance, reliability, and cost. It helps your team to be more agile and innovative by accommodating rapidly changing technology in your system.

Redesigning a legacy system requires a long-term project with lots of effort and increased cost. Before kicking off a large modernization effort, as a...