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Tech Freedom Circle
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Tech Freedom Circle

Crazy Maker Circle (Tech Freedom Architecture Circle): a community of tech enthusiasts, experts, and high‑performance fans. Many top‑level masters, architects, and hobbyists have achieved tech freedom; another wave of go‑getters are hustling hard toward tech freedom.

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Recent Articles

Latest from Tech Freedom Circle

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Tech Freedom Circle
Tech Freedom Circle
Nov 4, 2025 · Backend Development

Designing a Non‑Intrusive Spring Cloud SaaS Multi‑Tenant Component for Full‑Stack Data Isolation

The article presents a step‑by‑step, code‑driven design of a Spring Cloud SaaS multi‑tenant solution that balances resource sharing and strict data isolation by using a shared‑database, shared‑schema approach with tenant_id filtering, ThreadLocal context, MyBatis‑Plus interceptors, Redis key prefixing, Sa‑Token session segregation, and Spring Boot auto‑configuration.

MyBatis-PlusRedisSa-Token
0 likes · 16 min read
Designing a Non‑Intrusive Spring Cloud SaaS Multi‑Tenant Component for Full‑Stack Data Isolation
Tech Freedom Circle
Tech Freedom Circle
Nov 3, 2025 · Backend Development

How to Build a Custom Spring Cloud Starter for Dynamic Gray Release

This article walks through the design and implementation of a self‑developed Spring Cloud LoadBalancer starter that supports dynamic gray routing, explaining why the default round‑robin strategy is insufficient, dissecting Spring Cloud LoadBalancer internals, and providing step‑by‑step code, Nacos configuration, and verification scripts to achieve safe, weighted traffic shifting during releases.

Gray ReleaseLoadBalancerNacos
0 likes · 19 min read
How to Build a Custom Spring Cloud Starter for Dynamic Gray Release
Tech Freedom Circle
Tech Freedom Circle
Oct 29, 2025 · Backend Development

Combining RocketMQ Transaction Messages, Local Message Table, and XXL‑Job for 10‑100k QPS Distributed Transactions

This article presents a detailed design for a high‑concurrency (10‑100k QPS) distributed transaction solution that integrates RocketMQ transactional messages, an eBay‑style local message table, and XXL‑Job reconciliation to achieve eventual consistency while handling failures, retries, and data‑explosion challenges.

CAP theoremDistributed TransactionHigh Concurrency
0 likes · 34 min read
Combining RocketMQ Transaction Messages, Local Message Table, and XXL‑Job for 10‑100k QPS Distributed Transactions
Tech Freedom Circle
Tech Freedom Circle
Oct 25, 2025 · Databases

Designing a 10 WQPS Redis Counter Component: A Systematic Timer Solution

This article presents a complete, step‑by‑step analysis of a high‑concurrency Redis counter component that supports up to 100 000 QPS, covering business pain points, architectural design, two core counting strategies, sharding, local batch optimization, code walkthroughs, and performance benchmark results.

AOPCounterHigh Concurrency
0 likes · 33 min read
Designing a 10 WQPS Redis Counter Component: A Systematic Timer Solution
Tech Freedom Circle
Tech Freedom Circle
Oct 23, 2025 · Databases

Why Consistent Hashing Fails: Why Redis, HBase, TiDB and Ceph Have Dropped It

The article examines the fundamental limitations of consistent hashing—its inability to preserve data locality, support range queries, and handle topology awareness—explaining why major storage systems such as Redis Cluster, TiDB, Ceph, and HBase have adopted alternative sharding strategies like hash slots, range partitioning, and CRUSH.

CRUSHCephConsistent Hashing
0 likes · 45 min read
Why Consistent Hashing Fails: Why Redis, HBase, TiDB and Ceph Have Dropped It
Tech Freedom Circle
Tech Freedom Circle
Oct 20, 2025 · Backend Development

Mastering JVM Tuning: Real-World Enterprise Case Study for Interview Success

The article walks through a high‑traffic video service that suffered GC spikes, details a systematic diagnosis of three JVM configuration flaws, evaluates four GC tuning schemes across load scenarios, resolves CMS‑related pauses, and presents concrete performance gains with metrics, code snippets, and visual charts.

CMSGC tuningHigh Concurrency
0 likes · 28 min read
Mastering JVM Tuning: Real-World Enterprise Case Study for Interview Success
Tech Freedom Circle
Tech Freedom Circle
Oct 16, 2025 · Databases

Redis Crash Interview: How to Recover a Failed Node and Estimate Data Loss

This article walks through a systematic emergency response for Redis outages, explains how Redis Cluster promotes a replica, quantifies the typical data‑loss window from hundreds of milliseconds to several seconds, and provides detailed persistence configurations (RDB, AOF, and hybrid) to minimise downtime and data loss.

AOFPersistenceRDB
0 likes · 35 min read
Redis Crash Interview: How to Recover a Failed Node and Estimate Data Loss
Tech Freedom Circle
Tech Freedom Circle
Oct 12, 2025 · Backend Development

Understanding and Solving GC Spikes in High‑Throughput Java Services

The article explains what a GC spike (Garbage Collection Spike) is, analyzes its typical causes such as large short‑lived objects, memory leaks, and heap configuration, presents a real‑world high‑concurrency case study, and details step‑by‑step JVM tuning and architectural strategies that reduced latency spikes and raised service availability from 95% to over 99.99%.

G1GCJVM tuningJava
0 likes · 32 min read
Understanding and Solving GC Spikes in High‑Throughput Java Services
Tech Freedom Circle
Tech Freedom Circle
Sep 29, 2025 · R&D Management

Mastering the Five Enterprise Architecture Frameworks: TOGAF, Zachman, OEA, ITSA, and DODAF

This article provides a deep dive into the five major enterprise architecture methodologies—TOGAF, Zachman, OEA, ITSA, and DODAF—explaining their core principles, step‑by‑step implementation processes, a detailed omni‑channel order and marketing platform case study, and a comparative analysis to help architects choose the right framework for their projects.

Architecture FrameworksDODAFEnterprise Architecture
0 likes · 40 min read
Mastering the Five Enterprise Architecture Frameworks: TOGAF, Zachman, OEA, ITSA, and DODAF