What is DDS？什么是DDS？（Data Distribute Service，数据分发服务）

本文链接：https://blog.youkuaiyun.com/DDS_CSIT/article/details/104922973

DDS（Data Distribution Service）是OMG发布的一种中间件协议和API标准，适用于工业物联网，提供低延迟、高可靠性和可扩展的架构。以数据为中心的DDS简化了分布式系统开发，支持QoS控制的数据共享，实现全局数据空间和动态发现。DDS系统可扩展，从边缘到云端，同时内置安全机制，保障关键任务环境的安全。

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What is DDS？什么是DDS？（Data Distribute Service，数据分发服务）

关键字：数据分发服务 DDS

The Proven Data Connectivity Standard for the Industrial Interet of Things 经验证的工业物联网数据连接标准

The Data Distribution Service (DDS™) is a middleware protocol and API standard for data-centric connectivity from the Object Management Group® (OMG®). It integrates the components of a system together, providing low-latency data connectivity, extreme reliability, and a scalable architecture that business and mission-critical Internet of Things (IoT) applications need.

数据分发服务（DDS™）是一个由对象管理组（OMG）发布的以数据为中心的中间件协议和API标准。DDS集成系统中的各个组件，提供低延迟数据连接、高可靠性以及高可扩展体系结构，以适应商业级物联网（IoT）应用程序的需求。

In a distributed system, middleware is the software layer that lies between the operating system and applications. It enables the various components of a system to more easily communicate and share data. It simplifies the development of distributed systems by letting software developers focus on the specific purpose of their applications rather than the mechanics of passing information between applications and systems.

在分布式系统中，中间件是介于操作系统和应用程序之间的软件层，使系统的各个组件能够更容易地通信和共享数据。中间件简化了分布式系统的开发，使软件开发人员专注于应用程序的业务本身，而不是花费精力研究应用程序和系统之间传递信息的机制。

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The DDS Middleware is a software layer that abstracts the Application from the details of the operating system, network transport, and low-level data formats. The same concepts and APIs are provided in different programming languages allowing applications to exchange information across operating systems, languages, and processor architectures. Low-level details like data wire format, discovery, connections, reliability, protocols, transport selection, QoS, security, etc. are managed by the middleware.

DDS中间件是一个软件层，它将应用程序从操作系统、网络传输和底层数据格式的细节中抽象出来。DDS提供多种编程语言的API，允许应用程序跨操作系统、跨语言、跨处理器体系结构交换信息。数据格式、发现匹配机制、连接方式、可靠性、网络协议、传输方式选择、QoS、安全性等底层细节由中间件管理。

Data Centricity 以数据为中心

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DDS provides Qos-controlled data-sharing. Applications communicate by publishing and subscribing to Topics identified by their Topic name. Subscriptions can specify time and content filters and get only a subset of the data being published on the Topic. Different DDS Domains are completely independent from each other. There is no data-sharing across DDS do