GUID在线生成工具

发布 : 2020-07-18 分类 : 记录 浏览 :

https://www.guidgenerator.com/online-guid-generator.aspx

What is a GUID?

GUID (or UUID) is an acronym for ‘Globally Unique Identifier’ (or ‘Universally Unique Identifier’). It is a 128-bit integer number used to identify resources. The term GUID is generally used by developers working with Microsoft technologies, while UUID is used everywhere else.

How unique is a GUID?

128-bits is big enough and the generation algorithm is unique enough that if 1,000,000,000 GUIDs per second were generated for 1 year the probability of a duplicate would be only 50%. Or if every human on Earth generated 600,000,000 GUIDs there would only be a 50% probability of a duplicate.

How are GUIDs used?

GUIDs are used in enterprise software development in C#, Java, and C++ as database keys, component identifiers, or just about anywhere else a truly unique identifier is required. GUIDs are also used to identify all interfaces and objects in COM programming.

本文作者 : preccrep
原文链接 : https://preccrep.github.io/2020/07/18/GUID%E5%9C%A8%E7%BA%BF%E7%94%9F%E6%88%90%E5%B7%A5%E5%85%B7/
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