Rehosting is a way to run legacy mainframe applications, intact, on an open system. This path is the fastest way to take applications off your mainframe hardware and run them on a Windows or Linux platform in a cloud-native environment. Application code written in legacy languages like COBOL or PL/1 are migrated as is and recompiled in the new environment with no change to the business logic. Rehosting helps to preserve the application's logic. At the same time, rehosting minimizes the risk and cost that comes with recoding the application for the new environment.
