An operations lab passionate about server tinkering 🔬 Sharing automation scripts, high-availability architecture, alert optimization, and incident reviews. Using technology to reduce overtime and experience to avoid major pitfalls. Follow me for easier, more reliable operations!
This guide walks you through a step‑by‑step process for quickly identifying the cause of high CPU usage in ClickHouse, from emergency triage and precise diagnosis using system tables to practical optimization techniques and a ready‑to‑run monitoring script.
After updating a core API's SSL certificate, a partner reported repeated SSLHandshakeException errors, mistakenly labeling the cert as a development version; thorough verification revealed the issue stemmed from an outdated Java trust store lacking the new Sectigo root, leading to a set of concrete remediation steps and best‑practice lessons.
This article explains the fundamental differences between asynchronous programming and multithreading, illustrates each with real‑world operations scenarios, outlines their key advantages and pitfalls, compares them in a concise table, and provides step‑by‑step guidance for communication, deployment, and troubleshooting.
This guide explains the fundamental differences between Layer 4 (transport‑level) and Layer 7 (application‑level) load balancers, compares Alibaba Cloud and Tencent Cloud offerings across performance, features, and pricing, and provides practical selection tips and common pitfalls to avoid.
This tutorial explains why HAProxy is essential for RabbitMQ clusters, walks through installing HAProxy on Ubuntu, configuring load‑balancing and health‑check parameters, integrating with Java applications, and validating automatic failover to ensure high availability and efficient resource utilization.
This step‑by‑step guide shows how to choose Zabbix over other monitoring tools, deploy a complete Zabbix stack with Docker Compose, configure agents on Linux and Windows, set up auto‑discovery, alerts (email, WeChat, escalation), use proxies for distributed monitoring, and optimize performance for enterprise environments.
This article explains how Redis master‑slave replication provides hot backup, read‑write separation, high availability, and horizontal scaling by detailing its three‑stage workflow, full and partial synchronization mechanisms, key configuration options, and practical analogies for clear understanding.
When a service crashes and users flood you with complaints, following a structured 15‑minute workflow—first narrowing the impact, then probing six layers (network, system, application, data, external services, security), and finally documenting the incident—lets you pinpoint and fix most outages quickly and reliably.
This guide equips MySQL ops engineers with practical DML/DQL commands, permission management, transaction handling, and common pitfalls, offering step‑by‑step examples, performance tips and safety checklists to ensure reliable database maintenance and troubleshooting.
This guide explains the fundamental differences between scp and rsync, outlines their mechanisms, advantages, and drawbacks, provides practical command examples for various scenarios, highlights common pitfalls, and offers a concise comparison table to help operations engineers select the appropriate tool for secure and efficient file transfers.
