A fleeting mayfly in the world, a single grain in the boundless sea.
The article explains how caching, especially with Redis, reduces database load in high‑traffic scenarios, but also details three cache failure modes—avalanche, penetration, and breakdown—and provides concrete mitigation techniques to keep systems stable.
The article explains how microservice decomposition introduces challenges such as locating services, routing external requests, balancing load, isolating failures, limiting traffic, and degrading non‑essential features, and it details the six core mechanisms—service discovery, API gateway, load balancing, circuit breaking, rate limiting, and degradation—that together form a complete service‑governance solution.
The article explains why a single order operation can involve multiple services and databases, introduces the challenges of distributed transactions, and compares three common solutions—Two‑Phase Commit, TCC, and Saga—detailing their mechanisms, strengths, weaknesses, and suitable scenarios.
The article explains the CAP theorem and BASE model by walking through a concrete scenario of two data centers losing network connectivity, showing how architects must choose between consistency and availability and illustrating typical CP and AP use cases.
The author describes creating a lightweight local dashboard that monitors Binance Alpha, crypto and US stocks, records purchase quantities and amounts, auto‑calculates averages and profits, and evolves through concrete AI prompts and iterative UI tweaks, all stored in a local JSON file.
This guide shows how to build a Flask service that reads image BLOBs from a MySQL database, validates requests, enables cross‑origin access, configures HTTPS with certificates, and returns the image as a URL for mouse‑hover display in FanRuan reports.
This guide explains how to replace Bootstrap with jQuery UI in FineReport, load the necessary CSS/JS files, and configure a tooltip on column E so that hovering over a cell shows a fixed‑URL image without causing the table to jitter.
This tutorial walks through creating a FineReport template, adding a parameter panel, designing the table, importing Bootstrap CSS/JS, configuring a tooltip, writing JavaScript to display a fixed‑URL image when hovering over cells in column E, and previewing the result.
This article walks through creating a safety‑protective‑equipment warning management system using FineReport, covering MySQL table setup, data import templates, batch handling, validation formulas, SQL‑driven datasets, pagination controls, batch deletion, warning calculations, detailed view reports, and dashboard visualisation with pie, bar and gauge charts.
The article explains what inversion pairs are, demonstrates a naïve O(n²) counting method, then introduces a smarter right‑to‑left approach using a Fenwick (Binary Indexed) tree with discretization to achieve efficient O(n log n) inversion counting, providing full Python implementations and step‑by‑step examples.
