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---
title: "Kill Switch"
type: concept
tags: [紧急恢复, 持续交付, 风险管控]
sources: ["https://launchdarkly.com/blog/rto-vs-rpo/"]
last_updated: 2025-07-26
---
## Definition
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。
## Use Cases (from this source)
- 支付处理器异常?切换到备用提供商
- 搜索结果异常?回退到旧算法
- AI 模型产生幻觉?切换回上一版本
## Benefits
- 将 RTO 从小时级降至秒级
- 无需在压力下调试
- 保护用户数据和体验
## Connections
- [[Feature Flag]] ← 实现方式 → [[Kill Switch]]
- [[RTO (Recovery Time Objective)]] ← 降低工具 → [[Kill Switch]]