Over ten years of BAT architecture experience, shared generously!
When Kafka consumers fall behind, this guide walks you through confirming the backlog, pinpointing bottlenecks in production, consumption, or brokers, and applying concrete steps—such as checking offsets, comparing TPS, inspecting consumer logic, and adjusting partitions—to efficiently eliminate lag.
The article explains that Java makes the String class final to ensure security, improve performance through string pooling and hash‑code caching, provide inherent thread‑safety, and maintain consistent behavior by preventing subclassing, illustrating each benefit with clear examples.
Elasticsearch achieves billion‑scale search performance by combining horizontal sharding, immutable inverted‑index segments, a two‑stage distributed Query/FETCH model, and multiple replicas with a coordinator node to ensure high concurrency, scalability, and availability.
This article explains the purpose and contract of Java's equals and hashCode methods, shows how the default implementations work, demonstrates why String overrides equals, outlines the three-step equality check, and provides guidelines for correctly overriding these methods in custom classes.
This guide explains how to enable idempotence in Kafka producers, configure essential settings, understand its guarantees and limitations, and when to adopt transactions or external deduplication for cross‑partition and exactly‑once semantics.
This guide explains the two main steps for expanding a RocketMQ cluster—scaling brokers and scaling name servers—detailing when to add resources, configuration changes, and command examples for a smooth horizontal expansion.
This guide explains how to unleash Nginx’s full concurrency potential by configuring worker_processes, worker_connections, system limits (ulimit and sysctl), and multi_accept, providing practical code snippets, verification commands, and a ready‑to‑use high‑traffic configuration example.
This article explains how to architect a database system that can sustain tens of millions of queries per second by combining sharding, read‑write separation, multi‑layer caching, traffic shaping, and robust high‑availability strategies to keep most requests off the database and ensure reliable data storage.
This article explains the thundering herd problem in Nginx when many workers compete for new connections and provides four practical solutions—accept_mutex, reuseport, multi_accept, and keepalive_timeout—along with configuration examples to improve high‑concurrency performance.
This guide explains the core concepts, architecture components, authentication flow, and real‑world deployment scenarios of Single Sign‑On (SSO) systems, helping architects build unified, secure login solutions for web, mobile, and micro‑service environments.
