To start with, we think it’s important to understand a little about the underlying hardware. The physical hardware instance, which is sometimes called a Central Electronics Complex (CEC), can have one or more compute engines, such as the general-purpose (GP) zIIP or IFL, and each compute engine can run one or more operating systems. Additionally, each CEC can be coupled to another CEC to provide a tightly coupled scale-out environment, as illustrated here:
Figure 2.1 – Typical mainframe configuration
This is what a typical mainframe configuration looks like.
z/OS – The most common IBM mainframe operating system
When most people think of mainframes, they are thinking of z/OS running on a GP processor on Z-series hardware. This is the operating system commonly used by banks, insurance companies, large retailers, and government agencies. The first step toward modernizing a z/OS system to Azure is to understand a little...