I am working on an online application where each user will have their own database automatically set up when they sign up. Since hub's accounts have unlimited databases, I am assuming this is possible. What is the maximum number of rows possible for each MySQL database? I have heard this has something to do with allowed space on the server. I'm wondering if I need to be concerned with database size limitations, and what to do right at the start to prevent issues in years to come when users accumulate enough data. Thanks!