Synology High Availability System Architecture Guide

This document is a technical report on Synology High Availability (SHA), detailing its architecture, components, and deployment best practices. It outlines the necessity for high availability solutions in modern business environments, particularly for critical services that cannot afford downtime. The report describes the architecture of SHA, which consists of two servers forming a high-availability cluster, where one acts as the active server and the other as a standby passive server. It explains the Heartbeat technology that facilitates real-time data replication between the two servers, ensuring minimal service interruption during failures. The document also discusses hardware components, network interfaces, and various network scenarios for implementing SHA effectively. Additionally, it presents best practices for deployment, including considerations for system performance and reliability. The report aims to provide a comprehensive understanding of SHA, making it accessible for small and mid-sized businesses seeking cost-effective solutions for service continuity.