For example, a forum with 500,000 users, 15 million posts, images allowed, and lets assume about 10,000 users visit/browse the site simultaneously.
What kind of resources would I expect to use based on those characteristics? So let me get this straight, each image or text document counts as an inode, and HostGator has a 100,000 inode limit for shared hosting. So a file can be any size and still count towards 1 inode, but then there is the disk space to consider (because shared hosting is not unlimited after all). Also, the number of simultaneous visitors would exceed certain daily bandwidth limits?