Ziru Official Tech Account
This guide explains TiDB Binlog fundamentals, its Pump‑Drainer architecture, how to scale Drainer nodes, use the Reparo tool to parse binlog files, and combine full backups with binlog for reliable data recovery after accidental deletions.
This article outlines the current state of network security in China, the government's strong emphasis on it, the legal framework, the necessity of incident response, detailed emergency‑response procedures, Ziru's own security program, and three illustrative case studies including Log4j2, a 2021 drill, and a FastJson vulnerability.
This article explains Linux memory metrics VSZ, RSS, and PSS, illustrates them with a roommate analogy, details PageCache and its role in I/O, describes swap behavior and the swappiness setting, and introduces zero‑copy techniques to reduce data copying and context switches.
A recent hardware failure left a physical server's disk read‑only, causing Redis to hang; this article explains the AOF mechanism, its potential pitfalls, log strategies, and practical steps to prevent and mitigate such issues in production environments.
This article explains why data loss can occur in Redis master‑slave clusters due to split‑brain scenarios, outlines step‑by‑step troubleshooting methods—including checking replication lag, analyzing client logs, and monitoring resource usage—and recommends configuration settings such as min‑slaves‑to‑write and min‑slaves‑max‑lag to prevent the issue.
This article explains the time‑wheel algorithm, from its basic circular‑buffer principle to simple, round‑based, and hierarchical variants, and shows how Kafka implements a multi‑level timing wheel to achieve efficient, low‑memory delayed task execution.
This article details the end‑to‑end development of a Sketch plugin—covering background motivations, toolchain setup with Skpm, Vue3, and webview, project architecture, build scripts, communication between webview and plugin, resource handling, drag‑and‑drop, data caching, and design‑validation features—providing practical solutions to common challenges.
This article explores the inner workings of Java’s CountDownLatch from JDK 1.8, detailing its core concepts such as the counter, thread synchronization, shared mode, and AQS mechanisms, and demonstrates practical usage through step‑by‑step code analysis and examples.
After the user center’s test environment repeatedly halted all database requests, we traced the issue to Druid’s connection pool threads blocking on takeLast(), discovered opentelemetry’s global lock causing deadlock, and resolved it by upgrading Druid and adjusting maxWait settings.
This report recaps a technical closed‑door session where experts from Weibo and Ziroom shared real‑world API gateway implementations, discussed centralized versus decentralized designs, explored the evolution of Ziroom's gateway, introduced the Gamma‑RPC framework, and debated future trends like service mesh.
