Learn how to use the Linux ps command with the etime and etimes options to display the elapsed runtime of a specific process on an Ubuntu server, including finding the PID, formatting the output, and hiding headers for clean results.
This article explains how major companies keep MySQL fast at massive scale and provides practical techniques—including schema design, InnoDB advantages, table compression, bulk loading order, and hardware choices—to optimize MySQL performance for billions‑row tables.
This article provides a detailed guide on installing Redis on Linux, configuring protected mode, using Java's Jedis client with Maven, performing message‑queue performance tests, comparing RDB and AOF persistence, and explaining master‑slave replication with configuration tips and code examples.
This presentation details Ctrip's payment engine reconstruction, describing the limitations of the legacy system, the new service‑oriented architecture separating payment planning and execution, channel‑specific services, the reconciliation system, and the operational measures taken to achieve high payment availability.
This article explains the Linux kernel’s widely used container_of macro, showing how it converts a member’s address into the containing structure’s base address through examples, typeof and offsetof usage, and demonstrates the underlying calculations with clear code snippets and illustrations.
Learn how to reduce MySQL replication delay by examining the three key stages—binary log writing, log transmission, and slave SQL replay—and applying tactics such as breaking large transactions, ignoring unnecessary databases, and enabling multi‑threaded replication in MySQL 5.7.
Modular design simplifies Node.js development but introduces uncertainty about third‑party modules, so understanding which packages you rely on, their usage, popularity, version status, and last update dates can boost confidence and maintainability of your codebase.
The article dissects Hadoop 2.4.1’s HDFS NameNode memory architecture, detailing how the Namespace, BlockManager, NetworkTopology, and LeaseManager consume the heap, exposing scaling problems when metadata reaches hundreds of millions of inodes and blocks, and recommending file merging, block‑size tuning, federation, or external KV stores to mitigate heap pressure.
This article provides a comprehensive overview of Docker's technical architecture, detailing its key modules such as the client, daemon, server, engine, job system, registry, graph, driver, libcontainer, and container components, and explains how they enable isolation, resource management, networking, and continuous deployment in modern DevOps workflows.
This article explains how to combine source NAT and NAT Server to implement bidirectional NAT on Huawei firewalls, classifies inter‑zone and intra‑zone NAT types, provides detailed configuration examples, and discusses the benefits and packet flow of each scenario.
This article explains how to split a NAT server across two ISPs using zone or no‑reverse parameters, addresses source‑return path issues with redirect‑reverse or reverse‑route commands, and shows how adding VRRP resolves ARP conflicts and intermittent connectivity in dual‑firewall deployments.
The article examines typical coordinate‑system and accuracy problems encountered when implementing location and map features on iOS and Android, explains why they occur, and shares Ctrip's practical solutions including coordinate conversion, Wi‑Fi handling, and WebView‑based map rendering.
This article presents a detailed technical guide on optimizing Android applications across UI smoothness, memory management, network efficiency, power consumption, and code structure, illustrating practical tools, metrics, and real‑world case studies from Ctrip’s large‑scale mobile platform.
This article presents a comprehensive overview of the Qdata session on OLAP engine exploration, detailing the limitations of traditional MySQL‑based solutions, the requirements for large‑scale analytics, the architecture and theoretical foundations of Apache Kylin, its cube construction process, storage in HBase, query rewriting, real‑world flight‑ticket data applications, and the encountered challenges with corresponding optimization practices.
The article describes how Ctrip’s network security team built an automated, centralized firewall management platform that handles multi‑brand firewalls, streamlines policy queries, generation, and deployment, integrates with change‑ticket workflows, and dramatically improves operational efficiency while reducing human error.
The Ctrip Information Security Salon held on August 20 in Shanghai featured expert talks on cloud‑based WAF, big‑data security analytics, ELK‑driven monitoring, product security practices, and concluded with a recruitment drive for security engineers, showcasing practical implementations and industry challenges.
The article explains how Android developers can build dynamic user interfaces by programmatically creating and adding views, replace XML drawables with Drawable subclasses such as StateListDrawable, GradientDrawable, and LayerDrawable, and generate NinePatchChunk data at runtime to use server‑delivered .9.png images without pre‑processing.
AliSQL’s open‑source launch sparked debate, prompting explanations of its 70% performance claim, ongoing maintenance guarantees, the absence of a commercial Enterprise edition, and how it differs from Alibaba Cloud RDS, which bundles AliSQL with additional managed services.
This article explains the fundamentals of unit testing, compares it with integration testing and TDD, describes characteristics of good unit tests, shows a practical .NET example using XUnit, FluentAssertions and Moq, and offers architectural tips for writing test‑friendly code.
At the ICML pre‑conference tutorial, experts presented deep residual networks, stochastic gradient methods for large‑scale learning, and deep reinforcement learning, highlighting architectural innovations, optimization theory, noise‑reduction techniques, and practical considerations for building scalable, high‑performance AI models.
