ID generation schemes

Saturday, June 28, 2008 at 5:08PM
unmesh in General Discussion

Hi,

Generating unique ids is a common requirements in many projects. Generally, this responsibility is given to Database layer. By using sequences or some other technique. This is a problem for horizontal scalability.
What are the Guid generation schemes used in high scalable web sites generally? I have seen use java's SecureRandom class to generate Guid. What are the other methods generally used?

Thanks
Unmesh

Article originally appeared on (http://highscalability.com/).