Couchbase has been designed to make the life of an administrator easy. As seen in the previous chapter, it can be installed with a few clicks, and most of the administrative tasks that are required for running and configuring clusters are managed by the Couchbase server itself. In fact, Couchbase provides very minimal configuration options to bring the cluster up and running, and the majority of these configurations can be performed through a very user-friendly user interface. In most cases, the administrator does not have to make any changes in configuration, unless required.

However, in any system, some operational tasks and maintenance are required to be performed for smooth operation and to keep the system healthy. For instance, when the load on the cluster increases, we can expand it by adding nodes to increase the memory and improve the disk I/O performance. Couchbase provides a mechanism to expand the cluster size when the application...