Ruohang Feng · Database Guru · Cloud Exiter
Ruohang Feng (@Vonng): Pigsty author, PGSTY founder, OSS contributor.
Database Guru, Cloud Exiter, PostgreSQL Mage, and AI Agent Explorer.
Columns
Database Guru
72posts
News, insights, and best practices from the database industry.
Cloud-Exiter
63posts
Cloud-exit and self-hosting — deep dives and cost analyses.
AI Agent Explorer
81posts
Agents, LLMs, and everything between AI and databases.
Postgres Mage
116posts
Blogs about PG ecosystem, admin, development and operations.
Travel Notes
10posts
Trips, hikes and the things seen along the way.
Miscellaneous
38posts
The things that are not about technology, or not only about it.
Latest Posts
The controversy over Kimi's overseas promotion exposes an old problem: paid promotion dressed up as word of mouth. How undisclosed ads poison technical information sources, and why I'd rather turn …
ChatGPT is the cautious chief engineer, Claude the strategist, Gemini the writer, and GLM the technical workhorse. After using them intensively every day, here is my take on their personalities, …
After 12 years of driving, I rented a range-extended EV for my first electric road trip to Huangshan. The attention freed up by driver assistance mattered more to me than fuel savings. Comfort and …
Human computers became the first programmers. Today, programmers face the same turning point. As AI takes over coding, engineers’ value will increasingly lie in design, taste, delivery, …
From PHP and GitLab to AI toolchains and certificate authorities, half the internet has been breached in a week. AI is accelerating vulnerability discovery and exploitation, making sustained …
TiDB Cloud breached, Zeabur shutting down, PostgreSQL 19 delayed: as AI accelerates vulnerability discovery and exploitation, how does the lag in deploying patches change the security calculus for …
From 2 billion chatbot users to 5,000 lab insiders: a five-level funnel estimates how deeply AI has taken hold. Many have tried it; intensive use is still rare.
Four spare hard drives and four NVMe SSDs found a home in a Beelink ME Pro. Why I chose it over the Minisforum N5, how I set it up with Ubuntu, and what a PC NAS can do beyond storing files.
Over China’s seven-day National Day holiday, I upgraded my home network to 10GbE, replaced two NAS boxes, and packed six machines into a rolling 12U rack. AI helped with hardware selection, rack …
Two Claude accounts were banned over China’s National Day holiday. The hardest thing to replace is two years of accumulated memory, not the model’s abilities. The post-ban export contained only an ID. …
From coding agents to always-on personal assistants, AI is starting to manage everyday life. A cloud computer, an identity, a wallet, and a group chat are becoming standard equipment. But first, …
ChatGPT Pro Max is priced at $500 a month, but the usage multiplier is what matters: 50× would preserve the bulk discount; 25× or even 20× would mean shrinking subsidies. The $200 Pro plan could …
Projects
PigstyA battery-included PostgreSQL distribution — the local-first, free and open source RDS.
SILOThe community-maintained MinIO fork that keeps S3-compatible storage open source.
OINKA local-first Hugo theme for engineering docs — the one this site runs on.
PIGOne command, any extension — across EL, Debian and Ubuntu.
SOWStore once, serve everywhere — building and mirroring APT and YUM repositories.
PG ExporterPostgreSQL observability expressed in SQL — 600+ metrics, declarative collectors.
Capslock EnhancementTurn the mostly useless CapsLock key into a fifth modifier.
PGEXT.CLOUDAn index, catalog and metadata for 2200+ PostgreSQL extensions, plus download, install and build matrices for 570+ of them.
PGSTYThe team behind Pigsty, and the open source and services around it.Publications
DDIADesigning Data-Intensive Applications, translated into Chinese.
PostgreSQL InternalsPostgreSQL Internals, translated into Chinese.
pg.centerPostgreSQL manuals, reference, and ecosystem knowledge across versions.
pgsql.ccPostgreSQL documentation and technical resources in Chinese, maintained by the Pigsty team.
Paper: D-Bot DB Diagnosis with LLMsDatabase Diagnosis System using Large Language Models, VLDB 2024.
Paper : Unified DB Access LayerA unified access layer over heterogeneous databases through PostgreSQL FDW.
Cyber DharmaSeven traditions orbiting one machine — notes on technology and belief.
Empire of AIDreams and nightmares inside OpenAI, translated into Chinese.
The Product-Minded EngineerA book on engineering with a product mind, translated into Chinese.