什么定义了实时/近实时系统? [英] What defines a real-time/near-real time system?

问题描述

系统是否应满足特定指标才能被视为/归类为实时 Web 应用程序或近实时 Web 应用程序?

Is there a specific metric which a system should meet to be considered/classified as real-time web application or a near- real time web application?

当我看到我正在工作的系统的非功能性需求时，说明解决方案应实时/接近实时地返回数据.我理解这些术语的定义(如发现 http://en.wikipedia.org/wiki/Near_real-time)，但我想知道是否有类似应用程序 UI 的标准(例如:Gnome 推荐http://developer.gnome.org/hig-book/3.5/feedback-response-times.html.en) 以期在 Web 应用程序中接近实时.

When I see a non-functional requirement for a system on which I am working which states the solution shall return data in real time/near real time. I understand the definition of the terms (as found http://en.wikipedia.org/wiki/Near_real-time), but I was wondering if there were standards like one might find for an application UI (example: Gnome recommendations http://developer.gnome.org/hig-book/3.5/feedback-response-times.html.en) for expectations of near real time in a web application.

这是另一个问题的变体:为企业定义网络实时

This is a variant of another question: Define realtime on the web for business

推荐答案

实时计算与性能无关，而是保证事件可以在设定的时间内完成.从 CPU 调度算法到操作系统，再到正在构建的应用程序，实时性要求对整个架构都有影响.

Real-time computing has nothing to do with performance, but rather the guarantee that an event can be completed in a set amount of time. Real-time requirements have implications throughout the architecture from CPU scheduling algorithms to the operating system all the way to the application being built.

实时要求是根据必须完成操作的时间量来指定的.再次强调，这必须是保证，并且在未达到截止日期时系统经常会出现故障(这是意料之中的).

Real-time requirements are specified in terms of the amount of time in which an operation must be completed. Again, this must be guarantee and systems will often fault when the deadline is not met (this is not expected).

另见什么是实时"

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