node - a host machine running one or more OpenStack Object Storage services
Proxy node - node that runs Proxy services
Auth node - an optional node that runs the Auth service separately from the Proxy services
Storage node - node that runs Account, Container, and Object services
ring - a set of mappings of OpenStack Object Storage data to physical devices
To increase reliability, you may want to add additional Proxy servers for performance.
This document describes each Storage node as a separate zone in the ring. It is recommended to have a minimum of 5 zones. A zone is a group of nodes that is as isolated as possible from other nodes (separate servers, network, power, even geography). The ring guarantees that every replica is stored in a separate zone. This diagram shows one possible configuration for a minimal installation.
