Warren
3595119941
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Phase 16.1: Fix SCP stdin timeout (final analysis: abandon SCP legacy, recommend rsync)
修改内容：
- stdin timeout: 从500 iterations (5s) 改到3000 (30s)
- max_poll_iterations: 从1000改到5000 (50s)
- SCP完全禁用stdin timeout (is_scp_command检测)
测试结果：
- ❌ SCP 20MB失败 (只传输12MB, 400 KB/s)
- ✅ rsync 20MB成功 (MD5一致, 780 KB/s)
- 结论：SCP legacy protocol效率低，放弃SCP，推荐rsync
决策：方案3 - 放弃SCP legacy，推荐rsync (见phase16_1_scp_analysis.md)
下一步：Phase 16.2 - 性能优化 (提升780 KB/s到21-36 MB/s)