📊 MongoDB Aggregation Framework📊 MongoDB 聚合框架 Purpose: Enables complex data analysis and transformation similar to SQL’s GROUP BY and JOIN. 目的：实现复杂的数据分析和转换，类似于 SQL 的 GROUP BY 和 JOIN。 Pipeline Approach: Data flows through multiple stages, each performing a specific...

🗂️ Working with MongoDB Indexes🗂️ 使用 MongoDB 索引📚 Overview of Indexes📚 索引概述 Definition: A database index functions like a book’s index, allowing faster query results by referencing an ordered list instead of scanning the entire dataset. 定义：数据库索引的功能类似于书的索引，通过引用有序列表而不是扫描整个数据集来加快查询结果。 Collection...

📚 Working with MongoDB📚 使用 MongoDB🗂️ Schema Design🗂️ 模式设计 Schemas provide a blueprint for data organization and storage. 模式为数据组织和存储提供了蓝图。 MongoDB is schema-less but using schemas can enhance: MongoDB 是无模式的，但使用模式可以增强： Consistency and Data Integrity: Ensures uniformity across documents in a...

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Hadoop Composition and StructureHadoop 的组成和结构🗂️ Introduction to Hadoop🗂️ Hadoop 简介 “Hadoop is a distributed System infrastructure developed by the Apache Foundation and designed by Doug Cutting, inspired by Map/Reduce and Google File System (GFS) developed by Google Lab.” “Hadoop 是一个由...

🌍 Hadoop Operating Modes🌍 Hadoop 操作模式Overview of Hadoop Operating ModesHadoop 操作模式概述 Local Runtime Mode 本地运行模式 Pseudo-Distributed Operating Mode 伪分布式操作模式 Fully Distributed Operating Mode 完全分布式操作模式 High Availability (HA) Operating Mode 高可用性 (HA) 操作模式 Local Runtime Mode本地运行模式Definition定义 Local...

📊 Big Data Concept📊 大数据概念What is Big Data?什么是大数据？ “Big Data refers to information that is too large to be captured, managed, processed, and collated into a more positive purpose to help enterprises make business decisions within a reasonable time through current mainstream software...

🗄️ Introduction to NoSQL🗄️ NoSQL 简介 NoSQL Definition: A type of database management system designed to handle large volumes of unstructured and semi-structured data without predefined schemas. The term has evolved to mean “not only SQL.” NoSQL 定义：一种数据库管理系统，旨在处理大量无预定义模式的非结构化和半结构化数据。该术语已演变为“不仅仅是 SQL...

进程的概念、组成、特征 概念：进程是进程实体的运行过程，是系统进行==资源分配==和==调度==的一个独立单位 调度（Scheduling）...