Data StorageKey-Value Stores

Key-value stores work by mapping keys to values. When you want to retrieve a value from a key-value store, you simply specify the key and the store will return the associated value. One of the benefits of this approach is that it can be very fast and scalable since there's no need to search through complex data structures. However, one of the drawbacks is that it can be difficult to query for data since you can only access values by their keys.

Benefits of Key-Value Stores 

• They are very simple to use and require little setup or maintenance. 
• They are extremely fast and scalable. 
• They are perfect for storing large amounts of unstructured data. 
• They can be used as cache systems to improve the performance of web applications. 

Drawbacks of Key-Value Stores 

• It can be difficult to query for data since you can only access values by their keys. 
• The data is not organized in any particular way so it can be difficult to find specific records. 
• There is no built-in support for transactions (i.e., all changes must be made at once).