Author: Zen and the Art of Computer Programming
As a branch of cloud computing, "elastic computing" mainly aims to solve the problems of elastic expansion, high availability and scalability of cloud computing resources. Its core technologies include virtual machine (VM), container (Container), automation, elastic scheduling, etc. In recent years, with the rise of the Internet of Things and edge computing, elastic computing has gradually entered cloud computing. This article will introduce the technologies related to elastic computing in detail from the perspectives of cloud computing and Internet of Things/edge computing, and explain the mechanism behind it and its application. It is hoped that readers can understand the current development status of elastic computing technology, and better understand the significance and future development direction of elastic computing.
2. Explanation of basic concepts and terms
cloud computing
Cloud computing is a service model that uses the Internet and computer technology for dynamic resource allocation and sharing, and provides data storage, processing power, network bandwidth, and computing power on the network to users.
IaaS（Infrastructure as a Service）
Infrastructure as a Service (IaaS) is an IT service model that provides infrastructure services to end users through the network, such as servers, networks, storage, security, load balancing, databases, etc., provided by cloud service providers. Customers can purchase or rent computing, storage, network, security and other infrastructures on demand according to business needs, and use them through remote management software or API. For example, Amazon AWS, Microsoft Azure, Baidu BCE, and Alibaba Cloud are all IaaS vendors.
PaaS（Platform as a Service）
Platform as a Service (PaaS) is an IT service model that provides end users with a complete platform environment through the network, including development environment, operating environment and service environment. Customers only need to develop, debug, and deploy applications on this platform. Can. Cloud service providers provide a variety of technology stack&#x