Posted by Rick Fowler, TCC Director of Mainframe Services

Mainframe users are under a lot of pressure right now. It is difficult for the critical applications running on legacy mainframes to be cost-competitive with applications run on other hardware architectures such as cloud-based platforms.

A popular method for solving this problem has been to recompile the source code and convert the data to more modern formats. Unfortunately, this does not work in all circumstances, such as if the source code is not easily available for all the programs. With some of the applications written thirty years ago, this is a distinct possibility.

I read a whitepaper published by LzLabs that outlined two other methods for migrating applications to the target environment without rewriting or recompiling the source code. These new methods are Operating System Rehosting and Application Workload Rehosting. Both utilize a complex rehosting infrastructure to provide a seamless migration. The Software Defined Mainframe – Leveraging “the Power of Modern”. (2017, September). Retrieved February 22, 2018, from

I will explore the pros and cons of each method in subsequent blog posts.

To learn more about TCC’s Mainframe Managed Services please visit our website

Click this link to download the whitepaper:




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