TempData: Is It Safe?

Question

I am using the TempData in order to preserve my model in when using a RedirectToAction. It works fine, but I have a nagging feeling that it might not b

Answer 1

Session state can work in a clustered environment, providing that one of two things happens

1. Your load balancer supports "sticky" sessions (i.e. all requests in a given session are routed to the same machine)
2. You configure the session provider to use an out of process session provider, you can use either the ASP.NET State Service or the SQL Session State Provider

The question of whether you should use tempdata or not is a different question altogether. I would argue that there is usually a way around it. If you are trying to avoid a hit to the database to reload an object that one action has already loaded, look at using a cache instead.