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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
Aug 29, 2022 · Backend Development

High‑Performance Thinking and Optimization Practices for Backend Systems

This article defines software performance as executor + (process + IO + computation), explains when performance should be considered, and presents a comprehensive framework of executor, I/O‑type, and generic optimizations—including concurrency, sharding, caching, compression, async, batching, and algorithmic improvements—supported by cross‑domain case studies.

Cachingasynchronousdevperfops
0 likes · 40 min read
High‑Performance Thinking and Optimization Practices for Backend Systems
Qunar Tech Salon
Qunar Tech Salon
Aug 17, 2022 · Operations

Design and Optimization of Testing Environment 3.0 at Qunar Travel

This article describes how Qunar Travel has evolved its testing environment governance from a fixed 10‑machine setup to a template‑driven, soft‑routing architecture (Environment 3.0), improving delivery speed, reliability, business connectivity, and reducing operational costs through automated sync, smart recommendations, and continuous business checks.

environmentmicroservicesoperations
0 likes · 22 min read
Design and Optimization of Testing Environment 3.0 at Qunar Travel
Qunar Tech Salon
Qunar Tech Salon
Jul 1, 2022 · Databases

Easy Dump – A Shell Wrapper for Simplified PostgreSQL Backup and Restore

Easy Dump is a Bash‑based utility that streamlines PostgreSQL backups by wrapping pg_dump and pg_dumpall, offering multiple dump modes, parallel execution, table exclusion, automatic configuration generation, and detailed success or failure notifications for reliable database migration and maintenance.

Easy DumpShell scriptdatabase backup
0 likes · 68 min read
Easy Dump – A Shell Wrapper for Simplified PostgreSQL Backup and Restore
Qunar Tech Salon
Qunar Tech Salon
Jun 22, 2022 · Operations

Design and Implementation of Multi‑Cluster HPA Metrics Collection, Analysis, and Reporting in Kubernetes

This article explains the background, benefits, and measurement criteria of Kubernetes Horizontal‑Pod‑Autoscaler (HPA), describes the creation of metric tables and SQL queries for collecting scaling events and CPU usage, and presents a Python‑based workflow that aggregates the data, stores daily reports, validates results, and sends automated email summaries.

HPAKubernetesPython
0 likes · 19 min read
Design and Implementation of Multi‑Cluster HPA Metrics Collection, Analysis, and Reporting in Kubernetes
Qunar Tech Salon
Qunar Tech Salon
Jun 16, 2022 · Operations

Practical Chaos Engineering Practices at Qunar Travel: Architecture, Scenarios, and Automation

This article details Qunar Travel's mature chaos engineering platform built on chaosblade, covering value analysis, system architecture, shutdown and dependency drills, automated closed‑loop testing, attack‑defense exercises, and the measurable reliability improvements achieved across thousands of services.

Distributed Systemschaos engineeringfault injection
0 likes · 18 min read
Practical Chaos Engineering Practices at Qunar Travel: Architecture, Scenarios, and Automation
Qunar Tech Salon
Qunar Tech Salon
Jun 8, 2022 · Backend Development

Design and Implementation of a Systematic Cache Architecture for High‑Performance Business Systems

This article describes how a multi‑layered cache system—including a DAO‑level Redis cache, shared cache components, and global cache planning—was designed, implemented, and deployed to reduce database QPS by over 80%, cut response latency, and improve overall system stability in a high‑traffic e‑commerce platform.

Cachingdatabaseperformance
0 likes · 30 min read
Design and Implementation of a Systematic Cache Architecture for High‑Performance Business Systems
Qunar Tech Salon
Qunar Tech Salon
May 23, 2022 · Fundamentals

How to Write Effective Technical Articles: Value, Breakthrough, and Practical Tips

This article shares the author’s experience and practical guidance on writing technical articles, covering why it matters, how to overcome initial hesitation, methods for continuous improvement, and detailed tips on content completeness, logical flow, structure, visual design, and daily habits.

article writingcontent creationknowledge sharing
0 likes · 15 min read
How to Write Effective Technical Articles: Value, Breakthrough, and Practical Tips
Qunar Tech Salon
Qunar Tech Salon
May 19, 2022 · Operations

Design and Optimization of a Large‑Scale Monitoring System at Qunar.com

This article describes the architecture, challenges, and performance optimizations of Qunar.com's Watcher monitoring platform, covering massive metric collection, master‑worker redesign, Graphite/Whisper storage enhancements, and future migration to Go‑based cloud‑native solutions.

CI/CDCloud NativeDistributed Systems
0 likes · 13 min read
Design and Optimization of a Large‑Scale Monitoring System at Qunar.com
Qunar Tech Salon
Qunar Tech Salon
May 11, 2022 · Frontend Development

Dynamic UI Implementation in Qunar's Large Client: Architecture, DSL Design, and Template Management

This article details Qunar's transition from native‑only homepage development to a dynamic UI solution using a Native‑plus‑DSL approach, covering background challenges, solution research, DSL architecture, data binding, virtual DOM layout, template management, real‑time preview, deployment results, and future plans.

DSLDynamic UILayout Engine
0 likes · 13 min read
Dynamic UI Implementation in Qunar's Large Client: Architecture, DSL Design, and Template Management