I'm working on a Drupal community site and I want to ask about these things:
How do I make a Drupal site more secure?
How do I make my site work as fast as possible when there is a lot of visitors and users on the site, and there is a lot of interaction with the database at the same time? How do I maintain the database consistent in this situation?
How do I configure Drupal to work during high server load? How do I configure my server's hardware to work during high load moments?