AmazonSNS是一种用于移动和企业级消息传递的网络服务，支持设置、操作和发送通知。采用发布-订阅模式，通过推送机制向客户端提供更新，无需轮询检查。适用于监控应用、工作流系统、时间敏感信息更新等场景。
Amazon SNS is a web service for mobile and enterprise messaging that enables you to set up,operate, and send notifications.
Amazon SNS follows the publish-subscribe (pub-sub) messaging paradigm,with
notifications being delivered to clients using a push mechanismthat eliminates the need to check periodically (or poll) for new information and updates.
Amazon SNS consists of two types of clients: publishers and subscribers (sometimes known as producers and consumers). Publishers communicate to subscribers asynchronously by sending a message to a topic. A topic is simply a logical access point/communication channel that contains a list of subscribers and the methods used to communicate to them.
Diagram of topic delivery
Common Amazon SNS Scenarios
Amazon SNS can support a wide variety of needs, including monitoring applications,
workflow systems, time-sensitive information updates, mobile applications, and any other application that generates or consumes notifications.
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