7FRESH Technical Preparation for the 11.11 Shopping Festival: System Scaling, Degradation Strategies, Emergency Plans, Performance Testing, and Operational Monitoring

7FRESH, JD.com’s fresh food solution supermarket, serves as an innovation leader in omni‑channel retail, and its technology R&D center has applied systematic digital, intelligent, and automated solutions across the entire supply chain to support the upcoming 11.11 shopping festival.

R&D Team – System Scaling – To handle sudden traffic spikes, the team performed capacity planning, optimized code to increase message‑processing throughput by tenfold, and configured auxiliary applications to assist when message volume surges, achieving cost‑effective extensibility.

Degradation Plan – The transaction system employs JVM cache, JIMDB master‑slave replication, multi‑cluster hot‑standby, and database read‑replica fallback. An additional read‑replica downgrade strategy was added to quickly recover from large‑scale cache inconsistencies, with JVM cache still protecting critical paths.

Emergency Plan – In case of issues, the team prepared multiple response measures: configuration fixes, selective circuit‑breakers or scaling, client‑side H5 fallback, feature shielding, rapid hot‑fix releases, and comprehensive monitoring with log collection and anomaly detection.

Backup Assurance – The supply‑chain tech team classified core functions, performed risk assessments, conducted fault‑injection drills (JIMDB, DB, JFS), and executed large‑scale traffic stress tests with the Quality & Efficiency Improvement Department to ensure the system can handle ten times the normal peak load.

Testing Team – System Stress Testing – Starting in early October, the team performed step‑wise performance tests on all subsystems (supply chain, pricing, inventory, promotions, POS gateway, etc.), achieving the goal of supporting ten‑fold daily peak traffic before November 1.

Network Operations Team – 24/7 Store Network Monitoring – By deploying a SYSLog system, the team achieved full‑scene, high‑precision, round‑the‑clock monitoring of store network devices, performed comprehensive scans and risk mitigation, and ensured network reliability during the traffic surge.

Product Operations Team – Front‑line Business Support – The team conducted nationwide store inspections, used tools like JinDouYun for real‑time anomaly monitoring, responded to issues within one minute via the XiaoJingLing feedback mechanism, and employed remote video inspections to ensure consistent store experience.

In summary, 7FRESH’s coordinated technical preparation—covering capacity expansion, degradation safeguards, emergency response, rigorous stress testing, continuous network monitoring, and proactive product operations—demonstrates a comprehensive approach to ensuring system stability and a seamless shopping experience during the 11.11 mega‑sale.