缓存包含子域的不同数据

Question

I'd like to ask about strange behavior of Cache object. I use Cache to store data specific for user (more accurately for session) with SessionID as a key.

For some reason the data in Cache appears not to be the same for different subdomains. I managed to keep SessionID equal across all subdomains: - I set domain attribute in httpCookies element in web config like ".domain.com". - I used this trick to ensure that SessionID cookie is stored across all subdomains. - I set sessionState mode to SQLServer.

I ensured that SessionID is really the same for all subdomains. What's more, it is interesting that when I use session state in place of cache, everything works just fine. Session returns expected data for all subdomains. But when I use cache with SessionID as a key, cache returns different data for different subdomain.

Of course, I could keep it in session state but I'm not really fan of it and try to avoid it whenever I can.

Any ideas would be appreciated.

Answer 1

What's more, it is interesting that when I use session state in place of cache, everything works just fine.

It works because you store SessionState in centralized location which is SQLServer.

The Cache for the current application domain. .

If you want to have same cache for all app domains, you need distributed caching such as Windows Server AppFabric