An experienced Tencent Cloud engineer shares a detailed case study of moving over 130 MySQL instances (20 TB) from on‑premise IDC to CDB for MySQL, covering test cases, migration tool mechanics, multi‑instance concurrency, binlog handling, encountered issues, and practical solutions that ensured a smooth, high‑availability transition.
This article explains how Google’s Site Reliability Engineering team designs and operates uniform hardware in its data centers, uses the Borg cluster manager, implements storage layers, SDN networking, monitoring, and a sample Shakespeare search service to achieve high‑availability, scalable production services.
This guide walks through hardening an Nginx web server on Linux by configuring default files, testing and reloading, enabling SELinux, mounting least‑privilege partitions, applying sysctl security parameters, removing unnecessary modules, and deploying an iptables‑based firewall with detailed command examples.
This tutorial shows how to create a three‑node MongoDB replica set using Docker, configure automatic primary election, verify data synchronization across secondaries, and simulate a primary failure to observe failover, providing a practical guide for high‑availability database deployments.
This article examines common misconceptions in designing geo-distributed active-active systems, explains why striving for perfect real-time data sync is unrealistic, and offers practical strategies—such as prioritizing core services, reducing distance, limiting data replication, and combining storage sync with messaging—to achieve reliable high-availability.
This article explains how Oracle protects shared resources with enqueue queues, details the naming of TM queue locks per table, describes the resource structure (KSQRS) that tracks owners, waiters and converters, and shows how hash tables and related parameters manage these structures efficiently.
A seemingly safe configuration swap using barriers caused a crash because a shallow copy duplicated resource pointers, leading to premature freeing of the active configuration; the article explains the bug, shows the faulty code, and presents a corrected approach.
This guide walks developers through creating a Wear OS “Hello World” app, handling ambient mode, using BoxInsetLayout, configuring Gradle for phone‑watch communication, implementing MessageApi/DataApi with GoogleApiClient, exploring Wear 2.0 features, and packaging the watch APK for publishing on Google Play.
The article describes how Haier’s e‑commerce platform uses a service‑oriented architecture based on Dubbo, a fine‑grained product query DSL, and a highly scalable product service design to handle massive traffic spikes during major shopping events while maintaining performance, extensibility, and reliability.
The article explains how a framework acts as a semi‑finished product that relies on abstract classes, the Open‑Closed principle, reflection, XML or annotation configuration, and conventions to let developers extend functionality while keeping the core immutable.
This guide walks you through installing Jenkins and Docker, configuring Jenkins agents, creating jobs and pipelines, mastering essential Docker commands and Dockerfile syntax, and finally integrating the two tools to establish a fully automated CI/CD environment for building and deploying applications.
This guide demonstrates how to simulate a high‑traffic scenario between two machines and use an iptables rule to reject connections from a specific host when its concurrent requests exceed ten, including command syntax, execution steps, and result analysis.
The article analyzes the trade‑offs of lowering gzip compression levels for high‑traffic activity pages, proposes pre‑compressing HTML and storing it in APC's user cache, discusses cache placement options, configuration parameters, testing results, and practical implementation details to boost QPS while managing bandwidth and latency.
This article describes how the English fluency app leverages deep neural network (DNN) models for real‑time speech scoring on smartphones, detailing offline inference challenges, BLAS‑based matrix‑vector optimizations, sparsity exploitation, cache‑friendly implementations, fixed‑point and NEON acceleration, as well as model compression techniques to improve accuracy and latency.
The article lists eight common complaints about MySQL—from deep‑rooted bugs and inflexible relational schemas to confusing forks, storage‑engine chaos, profit‑driven licensing, weak native JSON support, and proprietary extensions—highlighting why many developers consider alternatives.
The Meituan‑Dianping team selected KIF for iOS UI automation because it leverages private APIs, integrates with XCTest, and matches their Objective‑C expertise, then built a testing bundle, wrote page‑object‑style KIF tests, and integrated them into Jenkins pipelines that handle simulator resets, keystroke delays, and multiple system alerts for reliable continuous integration.
An automated database operations platform shifts routine DBA tasks to developer self‑service and fully automates processes such as cluster provisioning, scaling, backup, migration, and sharding, using a stateless workflow center, job queue, and unified SqlEditor to improve efficiency, safety, and auditability.
This article outlines comprehensive mobile performance testing practices for Baidu Video, covering background, key performance dimensions such as smoothness, crash, memory, power, CPU, and network, and detailing metric collection methods on Android and iOS using command‑line tools, Xcode Instruments, and third‑party utilities.
This article provides a comprehensive guide to the Linux Test Project (LTP), covering its purpose, supported architectures, directory layout, installation steps, test categories, execution scripts, stress‑testing commands, result analysis, and troubleshooting tips for improving kernel stability and reliability.
This guide demonstrates how to switch Oracle Database 11g between Automatic Shared Memory Management (ASMM) and Automatic Memory Management (AMM), covering environment setup, parameter adjustments, spfile/pfile handling, restart procedures, and troubleshooting, with concrete SQL commands and shared‑memory observations.
