Module 03 · Introducing Apache Cassandra: An Open-Source NoSQL Database

Glossary: Working with Cassandra术语表：使用 Cassandra

Welcome! This alphabetized glossary contains many of the terms you'll find within this course. This comprehensive glossary also includes additional industry-recognized terms not used in course videos. These terms are important for you to recognize when working in the industry, participating in user groups, and participating in other certificate programs.
欢迎！这个按字母顺序排列的术语表包含了您在本课程中会发现的大量术语。这个全面的术语表还包括了课程视频中未使用的、行业认可的术语。这些术语对于您在行业内工作、参与用户组以及参与其他认证项目时都非常重要。

Term 术语	Definition 定义
Cluster 集群	A group of interconnected servers or nodes that work together to store and manage data in a NoSQL database, providing high availability and fault tolerance. 一组相互连接的服务器或节点，协同工作以在 NoSQL 数据库中存储和管理数据，提供高可用性和容错能力。
Consistency 一致性	In the context of CAP, consistency refers to the guarantee that all nodes in a distributed system have the same data at the same time. 在 CAP 的背景下，一致性指的是保证分布式系统中的所有节点在同一时间拥有相同数据。
Dynamic table 动态表格	A dynamic table allows flexibility in the columns that the database can hold. 一个动态表允许数据库在列上具有灵活性。
Keyspace 键空间	A keyspace in Cassandra is the highest-level organizational unit for data, similar to a database in traditional relational databases. 在 Cassandra 中，键空间是数据的最高级组织单元，类似于传统关系数据库中的数据库。
Lightweight transactions 轻量级事务	Lightweight transactions provide stronger consistency guarantees for specific operations, though they are more resource-intensive than regular operations. 轻量级事务为特定操作提供了更强的容错保证，尽管它们比常规操作更耗费资源。
Partition key 分区键	The partition key is a component of the primary key and determines how data is distributed across nodes in a cluster. 分区键是主键的一个组成部分，决定了数据如何在集群中的节点之间分布。
Primary key 主键	The primary key consists of one or more columns that uniquely identify rows in a table. The primary key includes a partition key and, optionally, clustering columns. 主键由一个或多个列组成，用于唯一标识表中的行。主键包括分区键，并且可选地包括聚簇列。
Replication factor 复制因子	The replication factor specifies the number of copies of data that should be stored for fault tolerance. 复制因子指定了为容错而应存储的数据副本数量。
Replicas 副本	Replicas in Cassandra refer to the copies of data distributed across nodes. Cassandra 中的副本是指跨节点分布的数据副本。
Replication strategy 复制策略	The replication strategy determines how data is copied across nodes. 复制策略决定了数据如何在节点之间复制。
Secondary indexes 次级索引	Secondary indexes allow you to query data based on non-primary key columns. 次级索引允许您根据非主键列查询数据。
Static table 静态表格	A static table has a fixed set of columns for each row. 静态表格的每一行都有固定的一组列。
Table 表格	A table is a collection of related data organized into rows and columns. 表格是将相关数据组织成行和列的集合。