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Multi-Host Cluster Deployment (Standard Mode) Environment Preparation Prepare three machines with RabbitMQ installed (refer to installation documentation): 10.10.1.41 10.10.1.42 10.10.1.43 Tip: When using virtual machines, create a base VM with RabbitMQ installed, then use linked clones for efficiency. Configuration Steps Modify /etc/hosts o ...

In a distributed architecture where multiple backend instances handle incoming traffic, maintaining a consistent authentication state is a common challenge. Typically, a standard implementation involves issuing a unique token to the user upon a successful login. This token is stored in a centralized cache, such as Redis, and the client must inc ...

Overview of gRPC gRPC is a high-performance, open-source remote procedure call (RPC) framework developed by Google. It uses the HTTP/2 protocol and supports multiple languages such as Java, C++, and Python. gRPC enables cross-language and cross-platform communication with more efficient data serialization and transmission, making it easier for ...

Core Concepts and System ArchitectureRedis Sentinel provides high availability for Redis deployments by managing automatic failover for master nodes. Built on top of the standard master-slave replication mechanism, it ensures continuous service availability when the primary node fails.Primary FunctionsMonitoring: Continuous health checks on bot ...

Standalone Server Limitations Relying on a single Elasticsearch instance introduces several critical constraints that hinder scalability and resilience: Storage capacity boundaries on a single machine. Single point of failure risks, preventing high availability. Restricted concurrent request throughput. Deploying a distributed cluster archite ...

Message Queue Fundamentals Definition A message queue serves as an inter-process communication mechanism that enables asynchronous data exchange between applications. Messages represent the data units transmitted between systems, while the queue provides a reliable delivery mechanism ensuring data integrity throughout the transfer process. Core ...

Standard Message Types RocketMQ supports three primary message sending modes, each balancing reliability and performance differently. Synchronous Sending: The producer blocks until it receives an acknowledgment from the broker. This ensures high reliability but incurs latency. Asynchronous Sending: The producer sends messages without waiting fo ...

Core Data Types and Internal Structures Redis supports five primary data structures, each optimized for specific use cases. Strings Binary-safe sequences capable of holding text, serialized objects, or binary data like images up to 512MB. They are the foundational type. SET user:name "Alice" GET user:name MSET user:age 30 user:city "NYC" INCR u ...

Background Introduction ZooKeeper Overview Apache ZooKeeper is a distributed coordination service that provides a reliable centralized solution for maintaining configuration information, naming, distributed synchronization, and group services. It is commonly used for service and configuration management within data centers. One of ZooKeeper's d ...

Single-System Locks In single-system architectures, locks like ReentrantLock are effective for controlling concurrent access within a single JVM. However, when multiple instances of an application are running behind a load balancer, these locks become ineffective as each instance operates independently. Testing with JMeter to simulate high co ...