Cloud on Vonng

FastJSON Broke Again. Why?

rh@vonng.com (Ruohang Feng) — Fri, 31 Jul 2026 00:00:00 +0000

FastJSON has failed again. When is “ship rough, scale hard, move fast” a defensible shortcut, and when does it become an engineering habit whose bill falls to whoever comes next?

Don't run AI assistant on cloud

rh@vonng.com (Ruohang Feng) — Fri, 30 Jan 2026 00:00:00 +0000

Before you hit “one-click deploy” on that cloud AI assistant, ask yourself: what exactly are you giving up?

There’s a reason why people by Mac mini rather than running clawdbot on the cloud.

S3: Elite to Mediocre

rh@vonng.com (Ruohang Feng) — Tue, 26 Dec 2023 00:00:00 +0000

S3 is no longer “cheap” with the evolution of hardware, and other challengers such as cloudflare R2.

Reclaim Hardware Bonus from the Cloud

rh@vonng.com (Ruohang Feng) — Thu, 16 Nov 2023 00:00:00 +0000

Hardware is interesting again, developments in CPUs and SSDs remain largely unnoticed by the majority of devs. A whole generation of developers is obscured by cloud hype and marketing noise.

FinOps: Endgame Cloud-Exit

rh@vonng.com (Ruohang Feng) — Thu, 06 Jul 2023 00:00:00 +0000

At the SACC 2023 FinOps session, I fiercely criticized cloud vendors. This is a transcript of my speech, introducing the ultimate FinOps concept — Cloud-Exit and its implementation path.

SLA: Placebo or Insurance?

rh@vonng.com (Ruohang Feng) — Mon, 12 Jun 2023 00:00:00 +0000

SLA is a marketing tool rather than insurance. In the worst-case scenario, it’s an unavoidable loss; at best, it provides emotional comfort.

Back to Basics: Tech Reflection Chronicles

rh@vonng.com (Ruohang Feng) — Mon, 29 May 2023 00:00:00 +0000

The cost-cutting imperative has triggered a reevaluation of all technologies, including databases. This series critiques hot DB technologies and poses fundamental questions about their trade-offs: Are cloud databases, distributed databases, microservices, and containerization real needs or false hype?

EBS: Pig Slaughter Scam

rh@vonng.com (Ruohang Feng) — Wed, 15 Mar 2023 00:00:00 +0000

The real business model of cloud: “Cheap” EC2/S3 to attract customers, and fleece with “Expensive” EBS/RDS

Garbage QCloud CDN: From Getting Started to Giving Up?

rh@vonng.com (Ruohang Feng) — Wed, 08 Mar 2023 00:00:00 +0000

I originally believed that at least in IaaS fundamentals — storage, compute, and networking — public cloud vendors could still make significant contributions. However, my personal experience with Tencent Cloud CDN shook that belief: domestic cloud vendors’ products and services are truly unbearable.