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---
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title: "Kill Switch"
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type: concept
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tags: [紧急恢复, 持续交付, 风险管控]
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sources: ["https://launchdarkly.com/blog/rto-vs-rpo/"]
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last_updated: 2025-07-26
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---
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## Definition
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Kill Switch(紧急关闭开关)是一种紧急机制,允许在发现问题时立即禁用某个功能,而不需要重新部署代码。
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## Use Cases (from this source)
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- 支付处理器异常?切换到备用提供商
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- 搜索结果异常?回退到旧算法
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- AI 模型产生幻觉?切换回上一版本
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## Benefits
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- 将 RTO 从小时级降至秒级
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- 无需在压力下调试
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- 保护用户数据和体验
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## Connections
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- [[Feature Flag]] ← 实现方式 → [[Kill Switch]]
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- [[RTO (Recovery Time Objective)]] ← 降低工具 → [[Kill Switch]]
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