MaGe Linux Operations
Apr 28, 2015 · Operations
How Yelp Achieved Zero‑Downtime HAProxy Reloads Using Linux qdisc
Yelp’s infrastructure team tackled HAProxy’s reload‑induced packet loss by leveraging Linux’s plug qdisc and iptables to delay SYN packets during reloads, enabling zero‑downtime service updates and improving reliability despite the kernel’s brief binding window.
HAProxyLinux qdiscNetwork Traffic Control
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