Author: Zen and the Art of Computer Programming
Artificial intelligence (AI) and machine learning (ML) have become an important force in the fields of distributed systems, cloud computing, and the Internet of Things. At the same time, open source technologies and tools have also promoted the rapid development of AI technology. As enterprises pay more and more attention to service availability (Service Availability), more and more companies begin to invest in building a reliable business service system. How to build a business service availability architecture and realize its management is one of the difficult problems faced by many IT departments. Service Availability Architecture (Service Availability Architecture, SAA), which is to decompose the normal operation state of business services into multiple subsystems or modules, configure reliability guarantee measures for each subsystem or module, and jointly form the overall reliability strategy of business services, including service overall availability and availability of service components. SAA forms a series of autonomous units by dividing subsystems or modules in the service system, and distributes different functions and operations to different subsystems, thereby improving the overall availability of services and increasing the fault tolerance of the system.
2. Explanation of basic concepts and terms
2.1 SAA model
Service Availability Architecture is a modeling tool that splits a complex and dynamic business process (Business Process) into multiple subsystems or modules, and configures corresponding availability guarantees for each subsystem or module. The SAA model consists of two main elements: Module and Dependency. A module is an independently runnable system that can be deployed on multiple servers and scaled out as needed; dependencies describe the communication methods between two modules.