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Consider a typical microservice deployment where an order processing service runs across multiple instances. A common requirement is to daily scan for successfully processed orders from the previous day and notify downstream analytics services. A naive implemantation using Spring’s @Scheduled annotation leads to duplicate execution in productio ...

This article provides a comprehensive explanation of Storm topologies. It assumes you have a basic understanding of Storm concepts. The topics covered include: TopologyBuilder API usage Submitting topologies to production clusters Running topologies locally for development and testing Core Concepts Building Topologies with TopologyBuilder Top ...

Redis cluster addresses storage limitations by distributing data across multiple master-slave node groups. Unlike sentinel mode, where all nodes store complete datasets, cluster mode partitions data to reduce individual node pressure. Data Partitioning Strategies Hash Modulo Approach This method applies a hash function to keys and uses modulo o ...

Today we're going to explore an interesting load balancing algorithm from Dubbo's source code. While I encountered this in Dubbo's implementation, it's not exclusive to Dubbo—it's a general algorithm concept. You can find Go implementations in go-zero as well. The official documentation provides two diagrams illustrating these strategies. When ...

Comparing Distributed File Storage Solusions When evaluating distributed storage architectures, MinIO stands out as a prominent solution. It is a high-performance object storage server built using Go, allowing it to run seamlessly across various operating systems including Windows, Linux, macOS, and FreeBSD. Its deployment is streamlined, often ...

Biulding a Single-Node Hadoop Installation For instructions on setting up a single-node Hadoop installation, please refer to: https://example.com/single-node-hadoop-setup Creating a Hadoop Cluster Cloning Virtual Machines Right-click on hadoop1 → Manage → Clone Click Next Select the current state of the virtual machine → Click Next Choose Crea ...

ZooKeeper is an open-source distributed coordination service designed for high availability, performance, and consistency in distributed applications. It provides a fundamental service: distributed locking. Distributed applications can build more advanced services on top of it, such as synchronization services, configuration maintenance, cluste ...

Overview =========== MQ (Message Queue) is a mechanism for storing and distributing message data in a structured queue format. A queue, as a fundamental data structure, follows the First-In-First-Out (FIFO) principle. Purpose of Message Queues ============================ Application decoupling (essential for distributed systems) Facilitat ...

Measuring Website Performance Metrics Response Time: Total duration from request initiation to response reception. Concurrency: Number of simultaneous requests a system can handle. Concurrent Connections: Total TCP connections established between clients and server per second. Queries Per Second (QPS): Requests processed per second. Concurrent ...

The Problem That Paxos Addresses The Paxos algorithm often appears cryptic and difficult to grasp. While numerous papers and articles exist, many feel abstract and unclear about its core principles and practical applications. This complexity stems from two factors: most Paxos materials focus on formal proofs of algorithm correctness, making the ...