This section of the chapter explains what group replication is, setting up group replication, configure and monitor group replication. Basically, MySQL group replication is a plugin that enables us to create elastic, highly-available, fault-tolerant replication topologies.
The purpose of the group replication is to create a fault tolerant system. To create a fault tolerant system, the components should be made redundant. The component should be removed without impacting the way system operates. There are challenges in setting up such a system. The complexity of such a system is of a different level. Replicated databases require maintenance and administration of several servers instead of just one. The servers cooperate together to create a group, which raises the problems related to network partitioning and split-brain scenarios. So, the ultimate challenge is...
