The article describes Weibo's large‑scale cross‑IDC distributed image storage system, its upload and download workflows, the challenges of massive seasonal traffic spikes, and the custom pipeline and lightweight compression library designed to achieve strong consistency and low‑latency image delivery.
With growing traffic, single-server sites struggle, so developers must share user sessions across multiple servers; this article explains three popular approaches—cookie-based, database-based, and Memcache-based session sharing—detailing their principles, advantages, and drawbacks to help choose the right solution.
This article shares Meituan’s practical strategies for efficient database operations, covering rapid business growth handling, automated DDL workflows, systematic training, capacity planning, backup automation with xtrabackup, and real‑world Q&A on monitoring, replication, and disaster recovery.
This article reviews the evolution of big‑data management technologies, discusses the criteria for choosing appropriate big‑data benchmarks, compares existing benchmarks such as MapReduce tests, YCSB, BigBench and BigFrame, and provides an in‑depth analysis of the TPC‑DS benchmark and its certification status.
This article explains how to address repetitive enum TypeHandler implementations in MyBatis by using inheritance and annotation-based approaches, presents concrete code examples, discusses their advantages and limitations, and compares them with MyBatis's built‑in EnumTypeHandler.
This guide walks you through preparing Docker, building a csphere/wordpress:4.2 image, running the container with proper environment variables, and clarifies the differences between ENTRYPOINT and CMD through hands‑on examples, helping you master container image creation and command execution in Docker.
This article explains the mechanisms of HTTP and DNS hijacking, illustrates real‑world examples, analyzes their causes and impacts on mobile applications, and presents practical anti‑hijacking techniques such as data validation, HttpDNS, ISP cache handling, illegal redirect blocking, and monitoring strategies.
This guide presents 25 practical PHP security best practices, covering configuration files, module management, error handling, file uploads, remote code execution, SQL safety, resource limits, user permissions, SELinux, firewall rules, and additional tools, to help administrators harden PHP deployments on Linux servers.
Keepalived, built on LVS, automatically monitors service nodes, isolates failed machines, and performs seamless failover between load balancers using VRRPv2, allowing web servers to be added or removed without manual intervention, thus ensuring high availability and efficient load distribution.
The article details how Qihoo 360 adopted MongoDB since 2011, scaling to over 100 applications, 1,500 instances and 20 billion daily queries, and shares their architectural choices, backup strategies, best‑practice recommendations, and advice for teams considering MongoDB in large‑scale, cloud‑native environments.
This guide explains how to use the Linux vmstat command to monitor system performance, detailing its output fields such as process states, memory, swap, I/O, system interrupts, and CPU usage, and shows how to interpret each metric for effective troubleshooting.
This article explains how browsers cache resources, the role of HTTP response headers such as Expires, Cache‑Control, ETag and Last‑Modified, and how conditional requests and different refresh actions affect caching behavior to improve web performance.
This guide explains how to configure Huawei IPSG on S-series devices by creating user‑bind tables and enabling IP source checking, providing both static and dynamic configuration examples with VLAN, DHCP snooping, and interface settings.
China Construction Bank faced fragmented security policy management across its thousands of branches, but by leveraging Huawei eSDK and a centralized controller, Qianfang Technology enabled the head office to configure and distribute policy templates, allowing flexible, region‑specific terminal security while maintaining unified oversight.
This guide explains how to configure Nginx to automatically detect user devices and redirect them to distinct PC or mobile websites, using both server‑side User‑Agent checks and client‑side JavaScript with cookies for manual switching and 24‑hour preference storage.
Understanding Linux system load involves checking the average number of processes waiting for CPU time, and the ‘uptime’ command provides the current time, uptime duration, active users, and three load average values for the past 1, 5, and 15 minutes, helping you gauge performance.
Discover twelve practical MySQL techniques—from avoiding dump file edits and tuning MyISAM block size to using EXPLAIN, query caching, and secure root password changes—that can boost performance, prevent data loss, and streamline database management for developers.
This article explains why Java introduced the stream concept, details the various byte and character stream classes, discusses buffering, outlines common IO exceptions, and shows how to properly close streams and specify character encodings for robust backend file handling.
This article explains what web caching is, how cache hit rates are measured, the request‑processing flow, freshness‑checking methods and cache‑control directives, then introduces Varnish as a high‑performance HTTP reverse‑proxy, detailing its threads, state machines, VCL syntax, installation, configuration examples and cache‑purge techniques.
This article analyzes a Node.js buffer‑overflow vulnerability triggered by oversized UTF‑8 decoding, explains the underlying V8 call stack and key functions, demonstrates an exploit using crafted POST requests, and outlines the official security fix that adds proper bounds checking.
