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Qunar Tech Salon
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Qunar Tech Salon

Qunar Tech Salon is a learning and exchange platform for Qunar engineers and industry peers. We share cutting-edge technology trends and topics, providing a free platform for mid-to-senior technical professionals to exchange and learn.

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Recent Articles

Latest from Qunar Tech Salon

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Qunar Tech Salon
Qunar Tech Salon
Jun 2, 2023 · Backend Development

Traffic Recording and Replay at Qunar: Architecture, Practice, and Impact on Interface Automation Testing and Full‑Link Stress Testing

This article describes Qunar's use of traffic recording and replay technology for fault isolation, performance optimization, and upgrade migration, detailing the evolution of their Java‑based agents, the end‑to‑end testing workflow, full‑link stress‑test integration, and the measurable business and performance outcomes.

Java AgentQunarautomated testing
0 likes · 15 min read
Traffic Recording and Replay at Qunar: Architecture, Practice, and Impact on Interface Automation Testing and Full‑Link Stress Testing
Qunar Tech Salon
Qunar Tech Salon
Jun 2, 2023 · Operations

Design and Implementation of a Distributed Tracing System at Qunar: Architecture, Technical Selection, and Performance Optimizations

This article describes the background, technology selection, architecture design, data flow, monitoring, logging, and trace collection mechanisms of Qunar's self‑built distributed tracing system, analyzes major performance problems such as Flume interruptions, Kafka bottlenecks, Flink back‑pressure, and presents concrete solutions including sliding‑window throttling, CGroup limits, and JavaAgent instrumentation, ultimately improving trace connectivity and system observability.

APMDistributed TracingFlink
0 likes · 18 min read
Design and Implementation of a Distributed Tracing System at Qunar: Architecture, Technical Selection, and Performance Optimizations
Qunar Tech Salon
Qunar Tech Salon
May 30, 2023 · Databases

Smooth Migration to Sharding: Design, Implementation, and Componentization of Qunar's Database Sharding Solution

This article describes the challenges of migrating a long‑running monolithic database to a sharded architecture, presents a two‑stage smooth migration strategy using double‑write, diff verification, and mapping‑key techniques, and details the componentized design, core implementation, and configuration of a reusable sharding framework built on MyBatis and Spring.

Data SynchronizationDatabase MigrationMyBatis
0 likes · 34 min read
Smooth Migration to Sharding: Design, Implementation, and Componentization of Qunar's Database Sharding Solution
Qunar Tech Salon
Qunar Tech Salon
May 17, 2023 · Frontend Development

QTest & QClient Technical Journey: Event Overview and Talk Summaries

The QTest and QClient technical journey event on May 23, 2023 features multiple expert talks on performance testing, AI‑enhanced frontend engineering, Serverless visualisation, user‑behavior replay, and a new React framework, along with registration details, promotional items, and recruitment information.

AIPerformance TestingQTest
0 likes · 5 min read
QTest & QClient Technical Journey: Event Overview and Talk Summaries
Qunar Tech Salon
Qunar Tech Salon
Apr 28, 2023 · Backend Development

System Slimming Practices at Qunar: Service and Code Reduction Strategies

This article presents Qunar's comprehensive system slimming initiative, detailing the background of growing code bloat, the challenges of reducing millions of lines across thousands of services, the two‑phase plan for service and code pruning, the use of SA and other tooling to identify and safely delete unused resources, and the measurable outcomes such as nearly 50% code reduction, improved development speed, and future directions for further optimization.

Backend Engineeringcloud nativecode reduction
0 likes · 20 min read
System Slimming Practices at Qunar: Service and Code Reduction Strategies
Qunar Tech Salon
Qunar Tech Salon
Apr 24, 2023 · Operations

Design and Evolution of Qunar's Watcher Enterprise Monitoring Platform

The article details the background, architecture, core features, alert governance, trace integration, and cloud‑native evolution of Watcher, Qunar's internally built, highly scalable monitoring platform that unifies application‑level metrics, alerting, and observability across thousands of services and containers.

Monitoringalertingcloud-native
0 likes · 19 min read
Design and Evolution of Qunar's Watcher Enterprise Monitoring Platform
Qunar Tech Salon
Qunar Tech Salon
Apr 19, 2023 · Operations

Heimdall Exception Statistics System: Architecture, Implementation, and Practice

This article describes the design, implementation, and evolution of Heimdall, an exception‑statistics platform built on Kafka, Flink, and HBase that provides minute‑level anomaly aggregation, stack trace querying, and integration with release and alerting workflows to improve service reliability across thousands of micro‑services.

Exception MonitoringKafkalog aggregation
0 likes · 14 min read
Heimdall Exception Statistics System: Architecture, Implementation, and Practice