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This article explains that www is merely a subdomain convention from the early internet, not a required URL component, detailing how multi-service hosting and technical limitations made it standard, and why modern advances in DNS, HTTPS, and CDNs have led to its decline in favor of naked domains like google.com.
This article details a four-layer ontology engineering system that transforms heterogeneous business data into a real-time ontology, enabling read-only AI agents to perform multi-hop reasoning over stable object identities, class relationships, and natural-language rules — demonstrated through a traffic accident investigation case study.
Qunar shares its engineering methodology for AI-driven large-scale refactoring of a 150K-line high-concurrency core system, achieving 70% efficiency gains (100PD to 30PD), 70% latency reduction, and 45% resource savings through Harness-Loop constraints, task decomposition, shadow traffic validation, and phased rollout.
This article argues that SQLite, often dismissed as a toy database, can replace specialized systems like Elasticsearch, MongoDB, Kafka, ClickHouse, Redis, and even microservices due to its stability, zero-configuration deployment, built-in full-text search, JSON support, vector extensions, and local-first architecture, reducing operational complexity.
The author tests AI tools like DeepSeek and ChatGPT for Kubernetes YAML generation, finding they handle standard templates well but fail on cluster-specific configs, security hardening, probe tuning, resource sizing, and complex multi-CRD scenarios, arguing ops value shifts from writing YAML to troubleshooting, architecture decisions, and platform building.
The article recounts SCO Group's 2003 $5 billion lawsuit against IBM over alleged Unix code in Linux, detailing how Linus Torvalds' 1992 switch to GPLv2 made Linux impossible to monopolize, how Torvalds publicly debunked SCO's code claims line-by-line, how a 1995 contract revealed SCO never owned the Unix copyrights, and how the case led to the kernel's Developer Certificate of Origin (Signed-off-by) still used today.
This article traces the origin of the Log-Structured Merge-Tree (LSM Tree) from a 1996 paper by Patrick O'Neil et al., explaining how its sequential-write, background-compaction design solved the random I/O bottleneck of B-Trees, enabling modern write-heavy systems like Cassandra, RocksDB, and Kafka.
Meituan's Turing team shares a comprehensive framework for evaluating AI agents, covering multi-layered assessment (result, process, efficiency, risk), human-machine alignment via binary rubrics, seed test sets, expert knowledge integration, and the shift toward infrastructure for long-horizon agents with task-based evaluation harnesses.
Despite 70% of BI products adding AI chat features, 90% of deployed ChatBI projects see under 30% adoption because semantic gaps, inconsistent metrics, and missing data governance make NL2SQL unreliable; true intelligent analysis requires unified definitions, semantic layers, and organizational adaptation, not just better models.
Uber engineering manager Sendil Nellaiyapen shares 14 hard-won principles covering system design foundations, scaling from thousands to millions, MVP trade-offs, clarity over seniority, avoiding experience traps, hypothesis-driven culture, latency misconceptions, guardrails for autonomy, and the mindset shift from engineer to manager.
