相同的配置集。当您在 Nacos 上创建⼀个配置时， 如果未填写配置分组的名称，则配置分组的名称默认采用 DEFAULT_GROUP 。配置分组的常见场 景：不同的应用或组件使用了相同的配置项，如 database_url 配置和 MQ_Topic 配置。 配置 ID（Data ID） Nacos 中的某个配置集的 ID。配置集 ID 是划分配置的维度之⼀。Data ID 通常用于划分系统的配 置 及程度有关。Consul 和 Eureka 都出现于 2014 年，Consul 在设计上把很多分布式服务治理上要 用到的功能都包含在内，可以支持服务注册、健康检查、配置管理、Service Mesh 等。而 Eureka 则借着微服务概念的流行，与 SpringCloud 生态的深度结合，也获取了大量的用户。去年开源的 Nacos，则携带着阿里巴巴大规模服务生产经验，试图在服务注册和配置管理这个市场上，提供给 为了标示该服务是哪种类 型的服务，需要在创建服务时选择服务的持久化属性。考虑到目前大多数使用动态服务发现的场景 为非持久化服务的类型（如 Spring Cloud，Dubbo，Service Mesh 等），Nacos 将缺醒值设置为 了非持久化服务。 85 > Nacos 架构 在 Nacos2.0 版本后，持久化属性的定义被抽象到服务中，⼀个服务只能被定义成持久化服务或非 持久化服

fulfills the order, sends order information to the warehouse system and then updates the order database with the order details. Once it's done that it acknowledges the message to tell the server that has been processed and can be forgotten about. Often the send to the warehouse system, update in database and acknowledgement will be completed in a single transaction to ensure ACID properties. Publish-Subscribe allows outrageous persistence message performance, something not achievable when using a relational database for persistence (although JDBC is still an option if necessary). Apache ActiveMQ Artemis clients

fulfills the order, sends order information to the warehouse system and then updates the order database with the order details. Once it's done that it acknowledges the message to tell the server that has been processed and can be forgotten about. Often the send to the warehouse system, update in database and acknowledgement will be completed in a single transaction to ensure ACID properties. Publish-Subscribe allows outrageous persistence message performance, something not achievable when using a relational database for persistence (although JDBC is still an option if necessary). Apache ActiveMQ Artemis clients

fulfills the order, sends order information to the warehouse system and then updates the order database with the order details. Once it's done that it acknowledges the message to tell the server that has been processed and can be forgotten about. Often the send to the warehouse system, update in database and acknowledgement will be completed in a single transaction to ensure ACID properties. Publish-Subscribe allows outrageous persistence message performance, something not achievable when using a relational database for persistence (although JDBC is still an option if necessary). Apache ActiveMQ Artemis clients

fulfills the order, sends order information to the warehouse system and then updates the order database with the order details. Once it's done that it acknowledges the message to tell the server that has been processed and can be forgotten about. Often the send to the warehouse system, update in database and acknowledgement will be completed in a single transaction to ensure ACID properties. Publish-Subscribe allows outrageous persistence message performance, something not achievable when using a relational database for persistence (although JDBC is still an option if necessary). Apache ActiveMQ Artemis clients

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188 33.4. WAN Full Mesh . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . fulfills the order, sends order information to the warehouse system and then updates the order database with the order details. Once it’s done that it acknowledges the message to tell the server that has been processed and can be forgotten about. Often the send to the warehouse system, update in database and acknowledgement will be completed in a single transaction to ensure ACID properties. 3.2.2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184 32.4. WAN Full Mesh . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . fulfills the order, sends order information to the warehouse system and then updates the order database with the order details. Once it’s done that it acknowledges the message to tell the server that has been processed and can be forgotten about. Often the send to the warehouse system, update in database and acknowledgement will be completed in a single transaction to ensure ACID properties. 3.2.2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184 32.4. WAN Full Mesh . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . fulfills the order, sends order information to the warehouse system and then updates the order database with the order details. Once it’s done that it acknowledges the message to tell the server that has been processed and can be forgotten about. Often the send to the warehouse system, update in database and acknowledgement will be completed in a single transaction to ensure ACID properties. 3.2.2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184 32.4. WAN Full Mesh . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . fulfills the order, sends order information to the warehouse system and then updates the order database with the order details. Once it’s done that it acknowledges the message to tell the server that has been processed and can be forgotten about. Often the send to the warehouse system, update in database and acknowledgement will be completed in a single transaction to ensure ACID properties. 3.2.2

fulfills the order, sends order information to the warehouse system and then updates the order database with the order details. Once it's done that it acknowledges the message to tell the server that has been processed and can be forgotten about. Often the send to the warehouse system, update in database and acknowledgement will be completed in a single transaction to ensure ACID properties. Publish-Subscribe allows outrageous persistence message performance, something not achievable when using a relational database for persistence (although JDBC is still an option if necessary). Apache ActiveMQ Artemis clients