Mainframe technology is still a modern and established platform

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Replatforming comes in many different forms and is based on the lift-and-shift concept. The term rehosting is also often used for this. A distinction is made here between solutions with and without recompilation. With compiler-based solutions, a recompile is carried out during replatforming and the application is migrated to a Java Virtual Machine (JVM). With the solution without recompile, applications, runtime environments and data are migrated 1:1 by machine. The EBCDIC mainframe format is retained. The applications are migrated in a type of container with binary compatibility to Linux/x86 architectures on premise or to the cloud. This is certainly interesting if you want to leave the zSeries in the short term - for cost reasons, for example. The application modernization then takes place in the next step. This technology is often referred to as "bridging technology".

In parallel, there are solutions that primarily decentralize the area of ​​application development into a client and/or server technology. However, production and operation initially continue to run on the host.

Of course, traditional outsourcing can also be described as replatforming/rehosting to a certain extent, although application modernization is not the focus here.

Replace follows the approach of replacing existing mainframe applications with standard software. There are numerous solutions on the market for different industries - including from adesso. However, not all mainframe thailand consumer email list applications can often be replaced with standard software. However, if the primary goal is to shut down the mainframe, then supplementary solutions such as code transformation are used for the so-called "remainders".

Reengineering or recoding follows the approach of reprogramming and reorganizing business processes. It is not about improving the maintenance quality of the software. It is about redesigning existing systems using engineering techniques, based on modern frameworks and programming languages, with the aim of replacing the old systems. The approach of bimodal IT advocated by Gartner is fundamentally rejected, because the main goal is integration into existing modern architectures.

There is no such thing as "simply" migrating or replacing a system - every system has grown to be a work of art and should therefore be treated with the appropriate artistry. At adesso transformer, we therefore always speak of hybrid modernization.