Kafka Core Concepts, Architecture, Performance Tuning, and Cluster Capacity Planning
This article provides a comprehensive overview of Kafka, covering its core value for decoupling and asynchronous processing, fundamental concepts such as producers, consumers, topics, partitions and replication, high‑performance mechanisms like zero‑copy and OS cache, detailed resource evaluation for CPU, memory, disk and network, operational tools, consumer‑group rebalance strategies, LEO/HW offsets, controller management, and delayed‑task scheduling.