我工作的一个项目，我需要生成大约十亿的GUID。

I am working on a project where I need to generate approximately 1 billion GUIDs.

我知道的GUID不保证唯一性，但是是唯一的，几乎所有的时间。

I know GUIDs are not guaranteed to be unique but are unique almost all of the time.

如果我产生了十亿的GUID，那是什么会有一个匹配的概率是多少？

If I generated a billion GUIDs, what is the probability that there will be a match?

推荐答案

http://blogs.msdn.com/b/oldnewthing/archive/2008/06/27/8659071.aspx

在.NET GUID由

The .NET GUID consists of

因此​​，通过奥斯卡引述的UUID的概率并不在这里工作。但是，如果您从一台计算机所有的1十亿的GUID，就没有机会得到重复的（除非你在玩的时钟; - ）

So the UUID probability quoted by Oscar does not work here. But if you create all your 1 billion GUIDs from one computer, there is no chance to get a duplicate (except you are playing with the clock ;-)