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This article explains how to design custom routing rules, version‑based load balancing, and gray‑deployment strategies in distributed microservice systems to isolate service versions, ensure safe acceptance testing, and smoothly roll out new releases.
This article dissects Java’s ReentrantLock implementation, detailing its delegation to AbstractQueuedSynchronizer, the lock acquisition process, the role of non‑fair and fair sync subclasses, the internal CLH queue mechanics, and how unlocking is handled, while comparing Lock with synchronized.
This article presents ten advanced Bash script examples that automate common system administration tasks such as backups, resource monitoring, updates, database dumping, FTP uploads, log keyword alerts, report generation, service recovery, temporary file cleanup, and network status checking.
This article explains the fundamentals of distributed transactions, covering ACID properties, the CAP theorem, two‑phase commit, TCC compensation, and a message‑queue based eventual consistency approach, while highlighting their advantages, drawbacks, and practical application scenarios.
This article explains Redis eviction policies, how the eviction process works, and practical solutions for cache penetration, breakdown, and avalanche, helping developers choose the right strategy and optimize cache performance under high load.
This article explains the fundamentals of ASM’s tree API for Java bytecode manipulation, illustrates the structure of class files, fields, methods, and signatures, and provides a practical example of inserting code to rename anonymous Thread instances during the Transform phase.
This article explains the motivation behind Netty's FastThreadLocal, details its internal design using an indexed array to avoid hash collisions, analyzes the core source code of InternalThreadLocalMap, FastThreadLocalThread, and FastThreadLocal, and discusses performance implications and reclamation strategies.
This article explains what MySQL indexes are, how they work, their advantages and drawbacks, the different index types—including primary, ordinary, composite, full‑text, clustered and non‑clustered—and compares B‑Tree with B+Tree structures to help you design faster, more efficient queries.
This article explains how to design custom routing strategies for versioned microservices, including default master branch routing, unified version routing, and service‑specific routing, and shows how to apply these rules to achieve gray deployments with load‑balancing and seamless version isolation.
This article examines the causes and consequences of TCP half‑open and full‑connection queue saturation, explains how the Linux backlog mechanism works, and offers practical solutions for handling listen overloads, drawing on a range of technical references and real‑world troubleshooting experiences.
