JD Digital's 2020 Double Eleven Technical Preparation: Scientific Operations, System Scaling, and Security Enhancements

On September 14, 2020 JD Digital officially entered the 11.11 preparation phase, assembling 19 teams—including payment, middle‑platform, consumer finance, operations, and customer service—under the coordination of the Quality Management Department.

Middle‑platform leader Shi Lirong emphasized a scientific preparation process: system sorting → capacity planning → disaster‑recovery filing → downgrade plan → stress‑test rehearsal → real‑time monitoring, with cross‑team collaboration to fine‑tune, rehearse, and finalize system adjustments for optimal stability.

The teams identified five core links—payment, financial‑app, AI, data‑center/network/middleware—and completed thousands of internal stress tests, three full‑link payment tests, and five group‑wide end‑to‑end tests.

All 40 improvement items identified after the previous year’s 11.11 event were fully resolved, minimizing risk.

Facing tougher challenges, the team completed unfinished network‑security drills, accelerated capacity expansion, and optimized system bottlenecks; firewall isolation, asynchronous redesign, HTTP request pooling, and migration of core JMQ to a dedicated broker cluster boosted WeChat order latency by 70% and reduced TP999 by 50%.

On the encryption front, the payment side adopted an AKS channel‑key encryption combined with full‑message symmetric encryption, more than doubling service performance while enabling real‑time monitoring and graceful downgrade of encryption methods.

Additional enhancements included data‑center isolation for the WeChat payment link, same‑data‑center core‑link calls to cut network latency, and extensive pressure‑testing guided by predefined emergency plans.

Operations collaborated with security teams to conduct DDoS drills and provided 24/7 security monitoring, adjusting protection strategies in real time to maintain service stability while reducing operational costs.

The effort exemplifies a coordinated, scientific approach where 19 JD Digital teams acted as a special‑operations unit, delivering a stable, high‑performance platform for the 2020 Double Eleven event.