Enterprise-level professional community for Database, BigData, and AIOps. Daily original articles, weekly online tech talks, monthly offline salons, and quarterly XCOPS&DAMS conferences—delivered by industry experts.
The article surveys ten historically influential programming languages—COBOL, ALGOL, APL, BASIC, PL/I, SIMULA, Pascal, CLU, ML, and Smalltalk—explaining their original purposes, key technical contributions, reasons they fell out of mainstream use, and how their ideas continue to underpin today’s software ecosystems.
The article satirically outlines four common ways CMDB projects become unusable—over‑recording assets, buying tools without process changes, reckless auto‑discovery, and isolating the database from business—then offers concrete anti‑pattern fixes and governance tips to turn a failing CMDB into a reliable digital foundation.
The fourth national database test shows a surge in II‑level certifications, a clear shift toward scenario‑specific and enterprise‑self‑use products, and highlights the need for continuous iteration and careful vendor selection as the Chinese database market moves into a deep‑technology competitive era.
This article explains the core principles of NUMA architecture, how it is deeply integrated into Linux kernel memory management, process scheduling, and system calls, and provides practical commands and real‑world examples to diagnose and optimize NUMA‑related performance issues.
The article analyzes how Claude large‑model AI is applied to DeWu’s financial data warehouse, detailing the domain’s unique challenges, the model’s three core capabilities, practical use‑cases such as OneData standardised modelling, AI‑assisted SQL coding and automated data testing, and the resulting efficiency, quality and reusability gains.
The 2026 XCOPS Intelligent Operations Conference in Guangzhou gathered leading scholars, industry experts, and technology innovators to explore AI‑driven operational upgrades, database intelligence, cloud‑native observability, and multi‑agent architectures, with detailed talks, case studies, and practical roadmaps shared by speakers from academia, finance, and major tech firms.
The article recounts how Gary Kildall created the BIOS abstraction and CP/M operating system, missed a pivotal IBM deal, and ultimately saw Bill Gates acquire a CP/M‑compatible QDOS to launch MS‑DOS, reshaping the personal‑computer era.
The article explains how MySQL implements COUNT(1), COUNT(*), COUNT(primary_key) and COUNT(column), showing that COUNT(*) and COUNT(1) have identical performance, COUNT(column) is the slowest, and provides indexing and approximation tips for large InnoDB tables.
This article showcases a collection of impressive SQL queries—including a PostgreSQL Tetris implemented with a recursive CTE, window‑function session analysis, a ClickHouse real‑time funnel, dynamic WHERE clause generation, and a recursive employee hierarchy—while discussing performance tips and engine choices.
The article details Huolala's transition from a basic Retrieval‑Augmented Generation (RAG) system to a GraphRAG architecture, explaining the challenges of traditional RAG, the design of offline and online stages, multi‑index hybrid search, concrete performance metrics (accuracy up to 78%, knowledge recall 91%, Top‑K 90%, MRR 0.73), and future plans such as stronger hybrid retrieval, reranking, and Agentic RAG.
