This article introduces tcpw, a small eBPF‑based utility that traces TCP, UDP, and Unix‑domain sockets to display the five‑tuple of commands like curl or telnet, explains its command‑line options, shows concrete usage examples, and details the underlying BPF and Go implementation, including connect, accept, and fork tracing.
This article explains the challenges of point‑to‑point data sync, introduces RocketMQ Connect as a cloud‑native solution that decouples upstream and downstream, details its architecture, connectors, REST API, metrics, deployment modes, and provides a step‑by‑step guide to building custom connectors for use cases such as CDC, data lakes, and system migration.
The article explains how the Linux kernel implements the TCP three‑way handshake, detailing server listen queue allocation, client connect port selection and SYN transmission, SYN‑ACK processing, state transitions, request‑socket management, full‑connection queue handling, and the final accept call, plus tuning tips.
This article provides a comprehensive overview of the MQTT CONNECT packet, covering its fixed and variable header structures, protocol name, level, flags, keep‑alive settings, session handling, will message behavior, payload composition, and the server's validation and response process.
This article walks through upgrading Consul to 1.2, configuring service‑mesh support, building two Go micro‑services, registering them with Consul, reloading the configuration, testing the mesh with curl, and provides a detailed analysis of Consul’s service‑mesh architecture, advantages, and limitations.
This article explains why Node.js throws errors like ETIMEDOUT and EADDRINUSE, detailing the underlying glibc connect() function, its error codes, and how non‑blocking sockets and thread cancellation affect resource handling.
