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wiki/concepts/RTO.md
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wiki/concepts/RTO.md
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---
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title: "RTO"
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type: concept
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tags: [Disaster Recovery, Metrics]
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sources: [rto-vs-rpo-disaster-recovery.md]
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last_updated: 2025-07-26
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---
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## Summary
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RTO(恢复时间目标)是衡量系统可容忍最大停机时间的关键指标。
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## Definition
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RTO是系统可容忍的最大停机时间,从系统故障到恢复正常运行的时间目标。
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## Key Claims
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- RTO是关于速度的:系统能多快恢复在线
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- 功能标志可将RTO从数小时缩短到秒级
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- 不同应用层级应有不同的RTO目标
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## Tiers
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- Critical: < 5分钟
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- Important: < 1小时
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- Nice-to-have: < 4小时
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## Connections
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- [[RPO]] ← 互补 ← RTO
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- [[功能标志]] ← 改善 ← RTO
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- [[灾难恢复]] ← 依赖 ← RTO
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