Why emulating a mainframe is a 20th-century solution to a 21st-century problem

Many companies offer solutions aimed at replicating the IBM mainframe ecosystem on x86. Some solutions, previously Platform Solutions Inc (aka PSI, https://www-03.ibm.com/press/us/en/pressrelease/24560.wss) and currently LzLabs (https://www.lzlabs.com), provide a form of binary compatibility that should allow complied programs to run on x86 unchanged. Other solutions emulate specific IBM mainframe components such as IBM COBOL, CICS, and JCL. Examples of these are Micro Focus (Enterprise Server), TmaxSoft (OpenFrame), NTT Data (UniKix).

Often, these types of solutions are assumed to be less risky and easier to implement than any true transformation solution, like Asysco’s, due to their ‘compatibility’ with the mainframe code. Vendors even claim that no changes to source code are required. However these often turn out to be false claims & assumptions. At the same time, emulation solutions suffer from a couple of significant drawbacks.

To read about these false claims and why there is a better solution, download the document below: