Which part of a GUID is most worth keeping?

Question

I need to generate a unique ID and was considering Guid.NewGuid to do this, which generates something of the form:

0fe66778-c4a8-4f93-9bda-36622         


        

Answer 1

I agree with Rob - Keep all of it.

But since you said you're going into a database, I thought I'd point out that just using Guid's doesn't necessarily mean that it will index well in a database. For that reason, the NHibernate developers created a Guid.Comb algorithm that's more DB friendly.

See NHibernate POID Generators revealed and documentation on the Guid Algorithms for more information.

NOTE: Guid.Comb is designed to improve performance on MsSQL