We were using default session state (in proc) in our application which we've built on top of Orchard. Now management has decided to install a load balancer in between. To make our sessions still work, I thought to go with Out of process session state. However, I am a bit confused that whether should I enable it in the 'Orchard.web' module of in specific modules where I've used sessions.
I was trying to search out if Orchard supports out proc sessions some other way or it should be the similar way like a normal asp.net application would have.
Any help would be appreciated
First off - I'm pretty certain that the Orchard team recommends avoiding session state at all costs. Anything that has session state is (by definition) stateful and that makes scaling outwards harder. However, assuming that you cannot avoid it:
1) It's just an ASP.NET application, the normal rules apply. Ensure the same machine key is set in app config, configure the session state mechanism of your choice (SQL/state server) and configure the appropriate values in web.config.
however
2) The standard ASP.NET session state implementation has really poor locking. This can lead to bad responsiveness issues for your pages. Check out this excellent question (and linked posts) on session state performance. You should evaluated for yourself whether you have any need for locked session state. We had to remove session state entirely in order to provide acceptable performance for our applications (and we've never looked back or found a reasonable argument for session over caching since