78 lines
2.1 KiB
Markdown
78 lines
2.1 KiB
Markdown
---
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title: "Disaster Recovery as a Service (DRaaS)"
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type: concept
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tags: [cloud, disaster-recovery, business-continuity, security]
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date: 2025-03-01
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---
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## Definition
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灾备即服务（DRaaS）是一种云原生灾难恢复解决方案，提供基于云的故障转移能力，使组织能够快速恢复关键业务系统，同时降低传统灾备基础设施的成本和复杂性。
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## Core Metrics
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### RTO (Recovery Time Objective)
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- 灾难发生后系统恢复的最大可接受时间
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- [[ITSM]]中业务连续性的关键指标
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### RPO (Recovery Point Objective)
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- 最大可容忍的数据丢失时间窗口
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- 决定备份频率和策略
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## DRaaS vs Traditional DR
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| 维度 | 传统灾备 | DRaaS |
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|------|---------|-------|
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| 成本 | 高CAPEX | 按需付费 |
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| 恢复速度 | 小时/天 | 分钟 |
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| 复杂度 | 高 | 托管服务 |
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| 测试 | 困难 | 自动化测试 |
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| 可扩展性 | 有限 | 云弹性 |
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## Key Features (Modern DRaaS)
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### AI-Driven Automated Failover
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```
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监控检测 → 故障确认 → 自动触发 → 故障转移 → 服务恢复
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↓ ↓ ↓ ↓ ↓
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AIOps ML模型 策略执行 DNS切换 健康检查
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```
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### Multi-Cloud Support
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- 跨云故障转移
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- 混合云灾备
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- 数据主权合规
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## In ITSM Context
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在[[ITSM]]中，DRaaS是[[Disaster-Recovery]]流程的核心：
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```
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Disaster Recovery & Business Continuity (ITSM 8.0)
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├── AI-driven Automated Failover
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│ ├── 智能故障检测
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│ ├── 策略驱动的故障转移
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│ └── 自动服务恢复
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├── RTO/RPO Optimization
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│ ├── 连续复制
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│ ├── 增量备份
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│ └── 快速恢复
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└── Cloud-native DRaaS
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├── 按需扩展
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├── 托管服务
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└── 成本优化
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```
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## Related Concepts
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- [[Disaster-Recovery]] — 灾备总框架
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- [[RTO]] — 恢复时间目标
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- [[RPO]] — 恢复点目标
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- [[Failover]] — 故障转移机制
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- [[Business-Impact-Analysis]] — 业务影响分析
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## Sources
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- [[understanding-complete-itsm]] — DRaaS在现代ITSM中的应用
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- [[rto-vs-rpo-key-differences-for-modern-disaster-recovery]] — RTO/RPO详解
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