Apparently, one of the worst things you can wish someone is “may you live in interesting times”. In these interesting times of ours, I wanted to write something to cheer you up, something optimistic. What could be more optimistic than an optimistic concurrency?

Concurrency conflicts in web applications can be quite troublesome. They occur when the same record in database is selected and then updated by more than one user. Can cause changes loss and be very frustrating for your users. In this post I describe the most important differences between optimistic concurrency and pessimistic concurrency.