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Should I have multiple databases?
Good reasons to create separate databases would be to support different availability requirements or simplify administration. For example if your databases require very different backup schedules or different recovery models. Another reason would be if you may want to run them on different instances.
Why might having more than one table in a database be beneficial?
Basically a single table is good when data is one-to-one. When you have thousands of rows and columns of data, where the data is one-to-many, multiple tables are better to reduce duplicate data.
How to handle large data in database?
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- Allocate More Memory.
- Work with a Smaller Sample.
- Use a Computer with More Memory.
- Change the Data Format.
- Stream Data or Use Progressive Loading.
- Use a Relational Database.
- Use a Big Data Platform.
Which is better one big database or several smaller databases?
One Big Database vs. Several Smaller Ones We have a situation were we can (A) deploy instances of an applications in one MySQL database using table prefixing or (B) use different MySQL databases for each instance of the application, for e.g., The end result being a large db with many tables. The end result being many databases with some tables.
What is good to have multiple database or multiple tables?
The amount of data that goes through the Network to your backup servers. This primarily can only be achieved in case of Archive Databases where the DBA might schedule a Full Backup every Sunday and differential backup every 24 hours for the next 6 days instead of a Full Backup everyday. This can only be achieved if there are separate Databases.
How big is a single database in MySQL?
A single database configuration would have required certain tables (approx 8 of them) to have multi-billions of rows of data, and the total db size would have been over 10Tb. We were able to have multiple servers with 5Tb of RAID 10 storage, with many databases on each.
What should go into a common table in MySQL?
Single valued attributes (eg. Birth date, height, weight etc.) are candidates to go into a common table with PersonId as the key. The number of attributes in each table should not be of concern at this point. Multi valued attributes such as Hobby need a slightly different treatment.