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During a night‑time outage, a XCache (Codis + Pika) instance hung due to massive write load triggering low‑level protection, causing Sentinel to switch masters; the proxy’s accept queue filled with timed‑out sockets, blocking new connections, so scaling the proxy layer and expanding capacity restored service while prompting automation, health‑check, and queue‑overflow alerts.
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eBPF, a safe, high‑performance Linux kernel extension evolving from the 1993 Berkeley Packet Filter to modern dynamic tracing, underpins Didi’s HuaTuo platform, which consolidates bytecode management, fast data processing, stability self‑healing, and container insight to solve traffic replay, topology, security, and root‑cause analysis challenges across cloud‑native services, with plans to broaden business use and community collaboration.
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