Web-farm suitable implementation of SessionSecurityTokenCache

Question

I need to implement SessionSecurityTokenCache in order to be able to use WIF in a load-balanced web farm. Is there a web-farm suitable (e.g. SQL based) implementation of this class that I can use, or do I really need to create my own?

Historiography

I am not sure if there's a built-in implementation but you might want to reference the following question, which does offer some sample code of a custom implementation. #8016042 – Knox