The article distills key concepts from Yu Jun’s book, outlining a product manager’s four core duties, user and transaction models, the relationship between enterprise, user and product, marginal economics, decision‑making frameworks, and practical guidance for selecting and growing product managers.
This article explains the foundational design of a payment system's account and accounting architecture, covering transaction models, account types, accounting entries, business processes, and the interaction between account, accounting, and settlement systems to ensure accurate financial tracking.
This article traces ZFS’s origins from its 2001 inception at Sun, outlines its open‑source evolution, and delves into core concepts such as storage pools, block management, copy‑on‑write, snapshots, deduplication, and the intricate transaction model that underpins its reliability.
This article walks through a real‑world case where a simple INSERT in TiDB runs for tens of seconds, explains how transaction modes and write conflicts trigger SQL retries, and outlines how to diagnose and configure retry behavior to avoid slow writes.
This article explains the concept of UTXO, how it underpins Bitcoin transactions, compares the UTXO model with traditional account‑based payment systems, illustrates transaction flows with concrete examples, and outlines the three core principles governing UTXO‑based ledgers.
