Database scalability

Database scalability is when a database can grow as your needs for information grow. Imagine a filing cabinet - it's great for storing a few pieces of paper but if you need to add more then you will need to buy a bigger filing cabinet. It's the same with a database. If you need to store more information then you need to make sure that the database can "scale up" to hold that information. That way when you need more information, the database can grow with you!