I tired 256 db's install in a test site and it is working fine. I am planning to go for 4096 db's install now. So before I start it I wanted to know if any of you have done a 4096 install. If yes then please share your experiences and/or any gotchas which you faced.
Also I wanted to know whether it is possible to spread the databases across multiple database servers or should all of them be present in the same physical database server.
I have a feeling that they can be placed in multiple database servers by specifying the appropriate db host in the wp-config.php file. But I want to confirm it from more experienced and expert guys like you before I proceed. Thanks!
I will post my experience with 4096 once I am done with it.