We have an ASP.NET 4.0 application that draws from a database a complex data structure that takes over 12 hours to push into an in memory data structure (that is later stored in HttpRuntime.Cache). The size of the data structure is quickly increasing and we can't continue waiting 12+ hours to get it into memory if the application restarts. This is a major issue if you want to change the web.config or any code in the web application that causes a restart - it means a long wait before the application can be used, and hinders development or updating the deployment.
The data structure MUST be in memory to work at a speed that makes the website usable. In memory databases such as memcache or Redis are slow in comparison to HttpRuntime.Cache, and would not work in our situation (in memory db's have to serialize put/get, plus they can't reference each other, they use keys which are lookups - degrading performance, plus with a large amount of keys the performance goes down quickly). Performance is a must here.
What we would like to do is quickly dump the HttpRuntime.Cache to disk before the application ends (on a restart), and be able to load it back immediately when the application starts again (hopefully within minutes instead of 12+ hours or days).
The in-memory structure is around 50GB.
Is there a solution to this?