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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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Latest from Qunar Tech Salon

100 recent articles max

Qunar Tech Salon

Jul 2, 2024 · Artificial Intelligence

Comprehensive Attribution Analysis Methodology and Its Business Application

This article presents a detailed attribution analysis framework—including background research, a four‑step workflow, Bayesian causal detection, Simpson's paradox handling, and real‑world case studies—demonstrating how data‑driven insights can improve conversion rates and operational efficiency across multiple business lines.

Attribution AnalysisBusiness AnalyticsSimpson's paradox

0 likes · 15 min read

Comprehensive Attribution Analysis Methodology and Its Business Application

Qunar Tech Salon

Jun 21, 2024 · Cloud Native

Redesigning Kubernetes DNS Architecture with q-dnsmasq for Improved Reliability and Performance

This article details the motivation, design, implementation, testing, and rollout of a refactored Kubernetes DNS solution that replaces the default kube-dns → CoreDNS chain with a node‑local q‑dnsmasq cache and parallel upstream queries to achieve higher availability, faster resolution, and better cache hit rates in large‑scale clusters.

CoreDNSDNSKubernetes

0 likes · 18 min read

Redesigning Kubernetes DNS Architecture with q-dnsmasq for Improved Reliability and Performance

Qunar Tech Salon

Jun 14, 2024 · Operations

Design and Implementation of a Second-Level Monitoring System for Qunar Travel

This article details the background, overall architecture, challenges, and step‑by‑step redesign of Qunar Travel's Watcher monitoring platform to achieve second‑level (per‑second) data collection, storage, and alerting, including storage engine selection, client and server optimizations, deployment strategies, and operational outcomes.

DevOpsMonitoringtime-series database

0 likes · 17 min read

Design and Implementation of a Second-Level Monitoring System for Qunar Travel

Qunar Tech Salon

Jun 12, 2024 · Artificial Intelligence

Design and Implementation of Qunar Flight Ticket Intelligent Alert (Radar) System

This article presents a comprehensive analysis and engineering of Qunar's flight‑ticket intelligent pre‑warning (Radar) system, covering the business need, value analysis, architectural redesign, feature extraction, indicator classification, accuracy quantification, multi‑algorithm anomaly detection, automatic parameter tuning, observed effects, and future plans to incorporate large‑model techniques.

Monitoringanomaly detectionflight ticket

0 likes · 17 min read

Design and Implementation of Qunar Flight Ticket Intelligent Alert (Radar) System

Qunar Tech Salon

May 24, 2024 · Cloud Native

Adopting a Shrink‑Then‑Expand Deployment Model to Improve Release Efficiency in a Large‑Scale Travel Platform

This article analyzes the release‑time bottlenecks of a core travel platform after the post‑COVID traffic surge and presents a shrink‑then‑expand deployment strategy combined with physical‑machine container deployment, evaluating several open‑source solutions and demonstrating significant improvements in release speed, resource cost, and system stability.

Kubernetescontainerdeployment

0 likes · 17 min read

Adopting a Shrink‑Then‑Expand Deployment Model to Improve Release Efficiency in a Large‑Scale Travel Platform

Qunar Tech Salon

May 20, 2024 · Big Data

Optimizing Kafka Production at Qunar Travel: Reducing CPU Usage by 2000 Cores

This article presents a comprehensive case study of how Qunar Travel identified and resolved Kafka production bottlenecks—through metric monitoring, thread and flush parameter tuning, and Filebeat batch adjustments—resulting in a 2000‑core CPU reduction, higher network idle rates, and lower resource consumption across three clusters.

KafkaMonitoring

0 likes · 12 min read

Optimizing Kafka Production at Qunar Travel: Reducing CPU Usage by 2000 Cores

Qunar Tech Salon

May 13, 2024 · Operations

Root Cause Analysis of Intermittent Timeout Issues in the Sirius Service Caused by RAID Card Consistency Checks

This article details the investigation of sporadic interface timeouts in the Sirius real‑time pricing service, revealing a weekly pattern linked to RAID controller consistency checks that cause IO spikes, logback queue blockage, and ultimately Dubbo client‑side timeouts, and proposes mitigation steps and general performance‑troubleshooting guidelines.

MonitoringPerformanceRAID

0 likes · 22 min read

Root Cause Analysis of Intermittent Timeout Issues in the Sirius Service Caused by RAID Card Consistency Checks

Qunar Tech Salon

Feb 20, 2024 · Databases

Qunar.com Redis Automation Operations System: Architecture, Deployment, Migration, Scaling, and Inspection

This article details Qunar.com's Redis automation operations system, covering background challenges, the high‑availability cluster architecture, resource management, automated deployment, various migration strategies, scaling mechanisms with RedisGate, inspection processes, and future AI‑driven enhancements.

AIDatabase OperationsMigration

0 likes · 14 min read

Qunar.com Redis Automation Operations System: Architecture, Deployment, Migration, Scaling, and Inspection

Qunar Tech Salon

Jan 18, 2024 · Databases

Optimization Journey of Qunar's Database Inspection and Alarm Systems

This article details Qunar's DBA team's systematic analysis of shortcomings in their original database inspection and alarm systems, the design and implementation of comprehensive metric enhancements, risk‑level classification, automated reporting, and alarm noise reduction, and reports the significant improvements in stability, efficiency, and fault‑free operation achieved through these optimizations.

Database MonitoringMySQLalarm system

0 likes · 15 min read

Optimization Journey of Qunar's Database Inspection and Alarm Systems

Qunar Tech Salon

Dec 29, 2023 · Artificial Intelligence

Design and Implementation of an AI‑Powered Development Assistant for Internal Use

This article presents the design, implementation, and measured impact of an AI‑driven development assistant integrated into the IDE, detailing its features such as intelligent context filling, custom Prompt templates, quick error diagnosis, internal system integration, and smart code completion, while also discussing limitations of existing tools like Copilot and ChatGPT and outlining future development plans.

AIDevelopment AssistantIDE integration

0 likes · 18 min read

Design and Implementation of an AI‑Powered Development Assistant for Internal Use