March 2024

System components are the basic building blocks of system design. They can be combined to construct complex software systems. Here we will also review the basic concepts of system design. System design is an important link in software engineering, which involves the overall architecture and design of the software system. A good system design can make software systems more reliable, scalable and easy to maintain.

Of course, if you want to use these components to design a system, you must first understand what design components there are? What does each design element represent? This article will introduce each system component, and the following chapters will explain the details and applications of each component in detail.

Back-of-the-envelope, also known as back-of-the-envelope calculation, is a method of calculating approximate values of complex problems using simple estimates.

Let’s also review here. A decentralized system consists of computing nodes connected through a network. These nodes can be various types of servers, such as web servers, application servers, and storage servers.

When designing a decentralized system, it is important to understand the number of requests each node can handle. At the same time, we can also determine the required number of nodes and traffic, so we will use Back-of-the-envelope to calculate our rough estimate, and finally design the system we need.