How does Microsoft Azure handle Session State?

Question

Does anyone have any information on how state is managed in Azure when you choose to have multiple instances? It seems like InProc would be worthless and you would have t

Answer 1

AppFabric Cache just went into production, and this is an excellent way to manage session data. In fact, it has a custom session state provider that simply drops into web.config. You'll find it in the Azure portal.

All info around cache sizes, pricing, and SLA is here.

Edit: Windows Azure Web Role templates now include the new ASP.NET Universal Providers, including a Session State provider that supports SQL Azure. Take a look at Nate Totten's blog post for more details.

EDIT 7/8/2012 Windows Azure now provides both a Cache Role and in-memory cache (both easily configurable with the latest tools and v1.7 SDK). The in-memory cache spreads cache across one of your existing roles instances, utilizing a set percentage of RAM (nice "free" option if you don't need much RAM in your app).