Can anyone describe me the architecture of mysql operation ?? I know it starts with a script, that manages the child process, and if child dies, it's replaced by a new one. I have several mysqld processes working simultaneously. How do they comunicate with each other ? Do they read concurrently from database files (only) ? Can I start two mysql instances (with several processes each) working on the same database files ? How is file access managed ? thanks Nelson Gomes - Dep. Internet a|cj Grupo Abril/Controljornal/Edipresse *: 21 415 21 60 *: [EMAIL PROTECTED]