| Term | Description |
|---|---|
| Node | - A node refers to an individual server or machine part of a more extensive database system. - It is responsible for storing and processing data and performing tasks such as updates, inserts, selects, etc. - A node can be a physical computer or a virtual machine (VM). - A node server can host a DB replica or primary. |
| Cluster | - A cluster is a group of servers or nodes that work together. - The purpose of a cluster is to distribute workloads, improve performance, and increase availability and resilience. Data can be replicated across multiple nodes in a cluster to ensure data integrity and availability. - Clusters can be designed to minimize latency and prevent bottlenecks in node-to-node communication. - Typically, at least one node is designated as the leader node, acting as the entry point to the cluster and possibly delegating incoming work to other nodes. |
