IIS app pools, worker processes, app domains

Question

Can anyone explain the differences, in IIS, between application pools, worker processes and app domains? Also, how do they work together? I\'ve read a couple of articles but

Answer 1

• One IIS server may have multiple application pools.
• One web application binds to one application pool.
• One application pool may have more than one worker process (when Web Garden is enable).
• One worker process can have multiple app domains. One app domain lives only in one worker process.
• One app domain may have multiple threads. One thread can be shared by different app domains in different time.

The meaning to ASP.NET developers: to make your web site scalable, don't use in-proc session and don't use static class variable lock for synchronization.