Should you have multiple databases?

Can I use 2 databases?

You can use two databases the same reason most banks have two ATMs, for reliability. You can swap one in if the other fails, but to do it quickly requires setup, such as a cname and controlling your own DNS server.

When should you use a separate database?

3 Answers. Show activity on this post. If you ever need to move the application, independently of the user database, then you need a separate database for the application (in whatever form that takes), so that the database can travel with the application, leaving the user data intact in its original location.

Why do organizations have multiple databases?

Why do organizations create multiple databases? First, because of resource limitations, organizations fund development of their information systems one application at a time. Second, organizations may acquire some of their information systems from outside vendors. This also results in a proliferation of databases.

Can a system have multiple databases?

By splitting the data into multiple databases, different applications only access the data that they need to be accessing. +1. The common terms for this technique are sharding and partitioning. Large scale applications don't keep all of their data in a single database.