Hi,

I'm newbie to nhibernate and i wonder how the second level work. Reading in the forum i 've found that the first level cache is hold by the Session object and i suppose that when the session is closed the cache is close too. But what about the second level ? does it hold data over the sessions so i could retrieve data in a new session whitout reading the DB (presuming these data was loaded in a previous closed session) ?

thanks,
cylt.

That's right. Teh second level cache is there so that some objects are cached after the session is closed.

Be aware that if you're clustering this can become a problem. The sysCache provided in NHContrib uses the common ASP.NET session to store elements so it is possible to set it to work in a load balanced scenario.

Here is the documentation: NHibernate.Caches