If you remember, in the previous section, we allocated CPU and memory. Just like in any other build environment, we need to specify, install, and configure resources. Whether they are virtual or physical, we’re still installing resources. In this case, we’re configuring this VM with 4 GB of RAM and two vCPUs. Remember, a vCPU […]
Read MoreFor everyone else, let’s make custom images for AWS It seems very simple: build an image, export the image, and import the image (wash, rinse, and repeat). The concept isn’t much more complicated than that. However, there are steps to go through, and some of those steps have catches. You’ll first have to walk through […]
Read MoreResilient Software The dictionary definition of resilience tends to reflect the ability of a software system to operate under stress or to absorb the impact of a problem. Maintaining stability and failing gracefully are other attributes of resilience where an acceptable service level continues to be offered to the business even when problems occur. It […]
Read MoreRequirements for Resilience: What Versus How I should note that even the world’s greatest developer will occasionally write code with bugs. Regarding bugs, PL/SQL is no different from any other programming language. In later chapters, I’ll look more closely at ways to structure PL/SQL to allow for a more resilient end result. In the meantime, […]
Read MoreAll of the code between the BEGIN and END was just plain SQL with no error or exception handling at all. Having so many inserts, updates, deletes, and joins is really an accident just waiting to happen. Initially, the developers were delighted that their code was experiencing no errors. One could even see a little […]
Read MoreUsing SQL for Complex Business Logic Is a Bad Idea With correct use of PL/SQL, you avoid mixing your application code with SQL. This also helps you to keep away from the knotty area of trying to express complex business logic in SQL scripts. SQL is not nearly as strong as PL/SQL in the area […]
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