JD Health Technical Product Team's 2021 618 Promotion Preparation: Architecture Review, Performance Tuning, Security Drills, and Monitoring

In 2021, JD Health's first 618 promotion after its Hong Kong listing became a critical test for the Technical Product Department, which supports all business lines and aims to ensure system stability and high availability during the massive sales event.

The department launched a preparation kickoff in early April, forming a 618 Preparation Committee led by Zhang Qixiang, and set detailed weekly plans covering architecture review, capacity assessment, performance testing, security drills, system optimization, on‑call monitoring, and product operation training.

System Architecture Review : Architects examined the business flow, deployment topology, risks, and weak points of hundreds of core systems, providing optimization recommendations and obtaining double‑checked sign‑offs from responsible owners.

Performance Tuning : Using mixed, high‑fidelity, and end‑to‑end stress‑test methods, the team conducted thousands of tests on nearly a hundred core systems over two weeks, establishing benchmark metrics based on previous 618 peaks and ensuring high‑availability under load.

Offensive‑Defensive Drills : Real‑world attack‑defense exercises were carried out with the “Snake” system, assigning attackers and defenders to simulate random issues, testing rapid response and remediation procedures for online incidents.

Monitoring and On‑Call Duty : Comprehensive monitoring was added for network, disk, CPU, memory, and JVM configurations; 24/7 rotating on‑call shifts were instituted with clear responsibility assignments to detect and resolve problems before they affect users.

The team also prepared specific risk‑mitigation plans for key business modules, such as the Internet Hospital, medical‑e‑commerce, and the “YaoJingTong” offline pharmacy system, implementing multi‑level disaster recovery, traffic throttling, circuit‑breaking, and data compensation strategies.

High‑fidelity traffic simulations were performed for the medical‑e‑commerce core flows, achieving ten‑times the normal peak throughput and confirming system robustness.

For the “YaoJingTong” system, 16 primary services were reviewed, over 20 optimization tasks were completed, and more than 30 core interfaces were stress‑tested at ten‑fold traffic, with targeted throttling, peak‑shaving, and degradation plans applied.

The Home Doctor and Health APP teams followed similar rigorous preparation, conducting architecture reviews, dependency mapping, flow analysis, and repeated stress tests on high‑traffic paths, while also participating in security drills.

Quality and safety initiatives were reinforced through a dedicated “Quality Month,” participation in national network protection actions, data and system security projects, and extensive training, culminating in ISO and CMMI certifications.

Overall, JD Health’s Technical Product Department mobilized all resources to guarantee system stability, support business growth, and deliver a seamless 618 experience for users.