Hi, We are looking at gearing up for Kohacon in preperation for the Koha conference and for possible implementations. In doing so I've got a few basic questions. I understand that Koha is essentially 2 parts an Apache application server and a MySQL database server. I also understand that some libraries run a seperate application server for staff access and one for patron access. If I'm not mistaken you can run these on different machines as well. 1) Is there any problem mixing Application servers with the Database server. Example a Mac serving MySQL and either Windows, Mac, or Linux App servers? 2) Any upper limit on the number of App servers? 3) Where does the Zebra indexing live? 4) What are the pitfalls of having the Database server on a separate server?