Lift n Shift Approach to Cloud Transformation

What does it mean to Rehost an application?

Rehosting is an approach to migrating business applications hosted in on-premises data center environments to the cloud by moving the application “as-is,” with little to no changes to the business functions performed by the application. It’s a faster, less resource-intensive migration approach that gets your apps into the cloud without much code modification. It is often a good first step to cloud transformation.

Organizations with applications that were initially developed for an on-premises environment commonly look to rehosting to take advantage of cloud computing benefits. These benefits may include increased availability and networking speeds, reduced technical debt, and a pay-per-usage cost structure. When defining your cloud migration strategy, it’s essential to analyze all migration approaches, such as re-platforming, refactoring, replacing, and retiring.

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In this blog post, I discuss an app modernization approach that we call “modernize-by-shifting.” In essence, we take an existing application and move it to “managed” container hosting environments like Azure Kubernetes Service or Azure Service Fabric Mesh. The primary goal of this app modernization strategy is to undertake minimal possible change to the existing application codebase. This approach to modernization is markedly different from a “lift-and-shift” approach where workloads are migrated to the cloud IaaS unchanged with little to no use of cloud native capabilities.

Step One of App Modernization by Shifting

As the first step of this approach, an existing application is broken into a set of container images that include everything needed to run a portion of the application: code, runtime, system tools, system libraries, and settings. Approaches to breaking up the application in smaller parts can vary based on original architecture. For example, if we begin with multi-tier application, each tier (e.g. presentation, application, business, data access) could map to a container image. While this approach will admittedly lead to coarser-grained images, compared to a puritanical microservices-based approach of light-weight images, it should be seen as the first step in modernizing the application.

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Inflexible customer solutions and business unit silos are the bane of any organization’s existence. So how does a large, multi-billion dollar insurance organization, with numerous lines of business, create a customer-centric business model while implementing configurable, agile systems for faster business transactions?

The solution is not so simple, but with our assistance, we’ve managed to point our large insurance client in the right direction. What began as a plan to develop a 360-degree customer profile and connect the disparate information silos between business units ultimately became the first step towards a more customer-centric organization.

A major multi-year initiative to modernize the organization’s mainframe systems onto the Microsoft technology platform will now provide significant cost savings over current systems and enable years of future business innovation. Read More…

Welcome to the first article in a series on moving enterprise systems from a mainframe-based platform to something else. That “something else” could be any number of things, but our default assumption (unless I say otherwise) is going to be a transaction processing system based on a platform like Microsoft’s .NET Framework.  While I expect that there will eventually be some technical content, the initial focus is going to be on planning, methodology, defining solutions and project management.  Moving a large system off of a legacy mainframe platform is very different from a development project that starts with a blank slate. Chances are that you’re going to be shifting paradigms for quite a few people in both your technical and business organizations — and for yourself, as well. Read More…