ASP.NET caching for web application with multiple domain names

Question

Is it possible to have a central cache for an ASP.NET web application that is accessed using multiple domain names? The web application is using a single website and application pool, with multiple domains (host headers) pointing to it.

A bit of background - the application has a lot of data that doesn't change much, and to alleviate database load, I've been storing this in static variables. This has been working without any problems when there is only a single domain. However, with multiple domains, it seems that each domain name being used to access the website has its own copy of this data, so when it's invalidated in one site, the others still retain their own version causing it to never be updated.

I've tried changing this to use HttpRuntime.Cache instead of static variables, but this also exhibits the same problem where each domain being used to access the site seems to be storing its own version of the data.

Is there any way to cache data within an ASP.NET web application that can be shared (and invalidated) across all domains being used to access it?

Answer 1

Try memcached. You can use the BeIT .Net API.

Memcached runs as a stand-alone service and is meant to facilitate distributed caching. It runs under windows and under Linux.

Answer 2

You could create a table in memory in your database and have all the applications pull from that. It should work essentially the same as your cache does now.