Practice together, never alone. We cover programming languages, development tools, learning methods, and pitfall notes. We simplify complex topics, guiding you from beginner to advanced. Weekly practical content—let's grow together!
The article examines the two most dangerous production failures in Redis high‑availability—split‑brain and replication storm—explaining their causes, real‑world impact, and practical engineering safeguards such as write‑protection parameters, network isolation, backlog sizing, and cascading replication.
Choosing a Redis persistence strategy requires balancing data reliability, recovery speed, performance impact, and storage cost, and this guide compares RDB, AOF, and hybrid approaches, provides configuration examples, and outlines best practices for production, backup, and Kubernetes deployments.
This article presents a step‑by‑step guide to designing and implementing a Kafka‑class distributed log‑based message queue kernel, covering architecture, sequential writes, sparse indexing, zero‑copy I/O, partitioning, replication, consumer‑group metadata, batch pipelines, crash recovery, and performance benchmarks.
This guide explains how to reliably export over a billion Elasticsearch documents within a few hours by using Point‑In‑Time (PIT) snapshots combined with parallel Slice processing, covering diagnostics, performance modeling, consistency levels, failure recovery, and resource isolation.
This article walks through why using a Redis Set for 200 million daily active users consumes 6‑8 GB of memory, how switching to a sharded Bitmap reduces usage to about 24 MB, and how Roaring Bitmap and ClickHouse further optimize sparse data and analytical workloads.
This guide walks through building a Kubernetes‑centric CI/CD system—covering high‑frequency releases, multi‑environment isolation, automated rollback, Jenkins pipeline examples, Harbor image registry setup, Argo CD GitOps workflows, blue‑green and canary deployments, configuration security, observability, and practical rollout recommendations for teams at any maturity level.
This guide walks through Redis's evolution from single‑node replication to Sentinel and native Cluster, explaining each architecture's principles, configuration steps, advantages, drawbacks, performance trade‑offs, and practical deployment recommendations for building highly available and scalable caching systems.
This article explores how to build a reliable, scalable transaction module for e‑commerce and finance, covering business requirement analysis, domain modeling, state‑machine design, layered microservice architecture, order creation and payment flows, idempotency, anti‑oversell mechanisms, performance tuning, monitoring, and evolution strategies.
This guide explains how MySQL processes queries in three index‑related stages—Index Key, Index Filter, and Table Filter—showing why keeping operations in the index layer dramatically improves performance and how to design and diagnose indexes effectively.
This article explains how the lightweight XXL‑JOB framework separates the scheduler from executors, provides high‑availability through database‑locked clustering and executor HA, supports elastic scaling in Kubernetes, and offers detailed task‑governance and performance optimizations compared with Quartz.
