We already came across the term bucket in the previous chapter. Now, let me explain this concept in detail, since it's the component that administrators and developers will be working with most of the time. In fact, I used to wonder why it is named "bucket". Perhaps, we can store anything in it as we do in the physical world, hence the name "bucket". In any database system, the main purpose is to store data, and the logical namespace for storing data is called a database. Likewise, in Couchbase, the namespace for storing data is called a bucket. So in brief, it's a data container that stores data related to applications, either in RAM or in disks.

In fact, buckets help you to partition application data depending on an application's requirements. If you are hosting different types of applications in a cluster, say an e-commerce application and a data warehouse, you can partition them using buckets. You can create two buckets, one for the e-commerce application and another for the data...