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---
title: High Availability
type: concept
tags: [Cloud, Reliability, Infrastructure]
sources: [The-Myths-and-Misconceptions-About-Cloud-Computing-LinkedIn.md]
last_updated: 2025-03-02
---
## Definition
高可用性High Availability是指通过冗余设计、自动故障转移和分布式基础设施确保系统在任意时刻均可访问的设计原则。
## Core Mechanisms
- 冗余基础设施Redundant Infrastructure关键组件多点部署
- 自动故障转移Automated Failover故障时自动切换到备用系统
- 全球数据中心分布Global Data Center Distribution跨地域部署
- SLA 保障:服务级别协议保证 uptime 通常超过 99.99%
## Key Claims
- 主要云提供商提供保证 uptime 超过 99.99% 的 SLA
- 冗余基础设施、自动故障转移和全球数据中心分布增强了可靠性
- 云解决方案具有高度弹性
## Connections
- [[Cloud-Native]] ← requires ← [[High-Availability]]:云原生应用依赖高可用性
- [[Multi-Cloud]] ← enables ← [[High-Availability]]:多云部署增强高可用性
- [[混沌工程]] ← tests ← [[High-Availability]]:混沌工程主动测试系统韧性