I have currently have a web application that caches a large amount of data (several hundred thousand entries) in memory for quick lookup and then in SQL Server as a persistent cache. Basically the information consists of geocodes of addresses where the geocode is retrieved via a remote web service which takes time if needed to be called continuously rather than cached.
Would using RavenDB (or other suggestions) be a better way of caching this information in a persistent store in terms of both speed and memory? Currently the app is hosted on a server which SQL Server sucks most of the memory dry so I would like a more light weight solution.
RavenDB as a document database seems overkill to me if only used as a cache. What about redis as a value store? It could better match what you are after