MDS 管理元数据信息 收集集群状态信息，自动调度 • 数据节点 Chunkserver 数据存储 副本一致性 • 客户端 Client 对元数据增删改查 对数据增删改查 • 快照克隆服务器MDS各个组件 MDS是中心节点，负责元数据管理、集群状态收集与调度。MDS包含以下几个部分： • Topology: 管理集群的 topo 元数据信息。 • Nameserver: 管理文件的元数据信息。 故障隔离的基本单元，一般来说属于不同zone的机 器至少是部署在不同的机架，一个server必须归属于一个 zone。 • server: 用于抽象描述一台物理服务器，chunkserver必须 归属一个于server。 • Chunkserver: 用于抽象描述物理服务器上的一块物理磁盘 (SSD)，chunkserver以一块磁盘作为最小的服务单元。TOPOLOGY curve在上物理pool之上又引入逻

搬站信息”表单，需提供如下信息：  Hadoop 类型和版本（CDH 自建、CDH 云上自建、Hadoop IDC 自建、Hadoop 云上自建、 云上托管 EMR）  集群规模（服务器台数） Alibaba Cloud MaxCompute 解决方案 25  网络环境（私有网络、经典网络、VPC 专）  有无专线  常用组件（Hive、Spa

"Data Access" as DA DA - [First Component] [First Component] ..> HTTP : use note left of HTTP : Web Service only note right of [First Component] A note can also be on several lines end note @enduml individuales Puedes especificar un color despues de la definición del componente. @startuml component [Web Server] #Yellow @enduml 7.12 Using Sprite in Stereotype You can use sprites within stereotype components #777777 } () "Data Access" as DA DA - [First Component] [First Component] ..> () HTTP : use HTTP - [Web Server] << Apache >> @enduml @startuml [AA] <> Guía de Referencia del Lenguaje PlantUML

"Data Access" as DA DA - [First Component] [First Component] ..> HTTP : use note left of HTTP : Web Service only note right of [First Component] A note can also be on several lines end note @enduml individuales Puedes especificar un color despues de la definición del componente. @startuml component [Web Server] #Yellow @enduml 7.12 Using Sprite in Stereotype You can use sprites within stereotype components #777777 } () "Data Access" as DA DA - [First Component] [First Component] ..> () HTTP : use HTTP - [Web Server] << Apache >> @enduml @startuml [AA] <> Guía de Referencia del Lenguaje PlantUML

"Data Access" as DA DA - [First Component] [First Component] ..> HTTP : use note left of HTTP : Web Service only note right of [First Component] A note can also be on several lines end note @enduml individuales Puedes especificar un color despues de la definición del componente. @startuml component [Web Server] #Yellow @enduml 7.12 Using Sprite in Stereotype You can use sprites within stereotype components ArrowFontName Impact ArrowColor #FF6655 ArrowFontColor #777777 } () "Data Access" as DA Component "Web Server" as WS << Apache >> DA - [First Component] [First Component] ..> () HTTP : use HTTP - WS @enduml

"Data Access" as DA DA - [First Component] [First Component] ..> HTTP : use note left of HTTP : Web Service only note right of [First Component] A note can also be on several lines end note @enduml individuales Puedes especificar un color despues de la definición del componente. @startuml component [Web Server] #Yellow @enduml 7.12 Using Sprite in Stereotype You can use sprites within stereotype components #777777 } () "Data Access" as DA DA - [First Component] [First Component] ..> () HTTP : use HTTP - [Web Server] << Apache >> @enduml @startuml [AA] <> Guía de Referencia del Lenguaje PlantUML

"Data Access" as DA DA - [First Component] [First Component] ..> HTTP : use note left of HTTP : Web Service only note right of [First Component] A note can also be on several lines end note @enduml individuales Puedes especificar un color despues de la definición del componente. @startuml component [Web Server] #Yellow @enduml 6.12 Using Sprite in Stereotype You can use sprites within stereotype components #777777 } () "Data Access" as DA DA - [First Component] [First Component] ..> () HTTP : use HTTP - [Web Server] << Apache >> Guía de Referencia del Lenguaje PlantUML (1.2020.23) 111 / 304 6.13 Personalización

"Data Access" as DA DA - [First Component] [First Component] ..> HTTP : use note left of HTTP : Web Service only note right of [First Component] A note can also be on several lines end note @enduml individuales Puedes especificar un color despues de la definición del componente. @startuml component [Web Server] #Yellow @enduml 6.12 Using Sprite in Stereotype You can use sprites within stereotype components #777777 } () "Data Access" as DA DA - [First Component] [First Component] ..> () HTTP : use HTTP - [Web Server] << Apache >> Guía de Referencia del Lenguaje PlantUML (1.2020.22) 100 / 292 6.13 Personalización

"Data Access" as DA DA - [First Component] [First Component] ..> HTTP : use note left of HTTP : Web Service only note right of [First Component] A note can also be on several lines end note @enduml individuales Puedes especificar un color despues de la definición del componente. @startuml component [Web Server] #Yellow @enduml 6.10 Using Sprite in Stereotype You can use sprites within stereotype components PlantUML (1.2019.4) 81 / 165 6.11 Personalización (Skinparam) 6 DIAGRAMA DE COMPONENTES HTTP - [Web Server] << Apache >> @enduml @startuml [AA] <> [BB] <> [CC] <>

"Data Access" as DA DA - [First Component] [First Component] ..> HTTP : use note left of HTTP : Web Service only note right of [First Component] A note can also be on several lines end note @enduml individuales Puedes especificar un color despues de la definición del componente. @startuml component [Web Server] #Yellow @enduml 6.10 Using Sprite in Stereotype You can use sprites within stereotype components PlantUML (1.2019.3) 81 / 157 6.11 Personalización (Skinparam) 6 DIAGRAMA DE COMPONENTES HTTP - [Web Server] << Apache >> @enduml @startuml [AA] <> [BB] <> [CC] <>