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HN: "most problematic minor program" referencehttps://news.ycombinator.com/item?id=4700160
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阿塞拜疆沿岸发生五次地震 20:45
The important design choice: lastFlush claimed immediately under lock, before any I/O operations. This provides at-most-once delivery semantics. If FlushTo.Handle returns partial error, claimed records never resend. Concurrent flush triggered by another goroutine computes its own non-overlapping range starting from current claim position. Simpler than tracking partial progress, and appropriate semantic for black box recorder where resending stale context proves worse than loss.