This guide details a step‑by‑step Huawei router configuration that creates basic and advanced ACLs, defines time‑based FTP access, sets up firewall zones for internal and external networks, and verifies the resulting security policies using command‑line examples.
This article details the evolution of Weibo's database platform—from its early single‑master design through rapid scaling, vertical and horizontal sharding, automation, Redis enhancements, custom middleware, and future plans—offering practical insights into high‑availability, high‑performance data engineering for large‑scale social media services.
This article provides an extensive overview of Java concurrency, covering synchronous vs asynchronous calls, critical sections, blocking and non‑blocking behavior, deadlock, starvation, livelock, concurrency levels, the Java Memory Model, atomicity, visibility, ordering, thread lifecycle, synchronization mechanisms, thread pools, and related utilities.
The article lists fifteen common workplace obstacles—such as endless meetings, email overload, misguided productivity metrics, technical debt, non‑technical managers, poor documentation, distracting environments, and a relentless chase for the newest tools—that hinder developers from writing high‑quality code efficiently.
This article explains six practical caching strategies—from client‑side HTTP 304 handling to Nginx static caching, full‑page, fragment, query, and database caches—using Ruby on Rails, Nginx, MySQL, and Redis to dramatically improve web application performance.
This article explains the HTTP protocol, outlines the purposes of GET and POST methods, details their characteristics, compares them across factors like caching, security, and data limits, and introduces additional HTTP methods such as HEAD, PUT, DELETE, OPTIONS, and CONNECT.
This article explains how MySQL 5.6 introduced parallel replication to overcome the bottleneck of a single SQL thread, detailing the underlying binlog events, configuration parameters, key data structures, worker coordination, checkpoint mechanisms, and potential limitations, all from a source‑code perspective.
This article recounts Alibaba’s journey from Oracle‑based IOE architecture to a home‑grown MySQL/DRDS solution, detailing the motivations, challenges, technical choices, performance pitfalls, and operational practices that shaped the migration and the lessons learned for large‑scale database engineering.
This article explains why simple password hashing is insufficient, describes common attacks such as dictionary, brute‑force, lookup‑table and rainbow‑table attacks, and provides best‑practice guidance—including random salts, CSPRNGs, key‑stretching algorithms like PBKDF2, bcrypt and scrypt—and complete PHP reference implementations.
This article explains the design, configuration parameters, core data structures, initialization, coordinator distribution, worker execution, checkpointing, and shutdown procedures of MySQL 5.6's Multi‑Threaded Slave (MTS) parallel replication, providing a code‑level walkthrough for developers and DBAs.
The article presents complete, licensed implementations of salted PBKDF2‑SHA1 password hashing for both ASP.NET (C#) and Ruby on Rails, detailing the source code, usage methods, and verification procedures to securely store and validate passwords.
This article explains Kafka's high‑throughput distributed messaging architecture, its typical scenarios such as log and operational data collection, the roles of producers, brokers, topics, consumers, Zookeeper, and provides a practical example of detecting abnormal user transactions.
This article explains how Booking.com solved MySQL master‑to‑hundreds‑of‑slaves bandwidth limits by introducing a Binlog Server component, detailing its design, advantages over traditional relay‑master setups, and multiple deployment scenarios for high‑availability and cross‑region replication.
This guide explains how to protect Linux servers from SYN flood and DDoS attacks by tuning sysctl parameters, applying iptables rules, installing the free DDoS‑deflate script, and monitoring nginx logs to identify and block malicious IPs and user agents.
This guide walks you through installing Go, cloning and patching the ngrok source, generating self‑signed certificates, compiling both the ngrok server and client, configuring DNS, and verifying the setup so you can expose local web services to the internet without relying on the official ngrok service.
This guide explains practical techniques for diagnosing Node.js production issues, covering request‑latency analysis, CPU profiling with perf and FlameGraph, crash investigation via Core Dumps and mdb_v8, and memory‑leak detection using gcore and mdb_v8 diff tools.
This article explains the purpose and proper use of HTTP 3xx redirect status codes—from 300 Multiple Choices to 307 Temporary Redirect—along with related caching headers like Cache-Control and ETag, highlighting differences, SEO implications, and how browsers handle each case.
The article presents a detailed overview of Ctrip's Hermes asynchronous messaging system, describing its architectural evolution from a simple Mongo‑based queue to a broker‑centric design with MySQL and Kafka back‑ends, and explains optimization techniques for single‑node performance, clustering, lease‑based management, and reliable delivery.
This article details Dazhong Dianping's practical approach to sharding its massive order database, covering vertical and horizontal partitioning strategies, specific sharding algorithms, unique ID design, data migration phases, and lessons learned for long‑term scalability.
The article critiques the hype around operations automation, arguing that many tasks can be handled with simple shell scripts, that automation should solve error‑prone manual work rather than replace thoughtful architecture, and that choosing the most convenient tool is more valuable than chasing trendy solutions.
