January 2018
Beginner to intermediate
234 pages
7h 8m
Chinese
Content preview from Kafka权威指南
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106
｜
第
7
章
你无法或者也不想修改它们的代码。
Connect
可以用于从外部数据存储系统读取数据，或
者将数据推送到外部存储系统。如果数据存储系统提供了相应的连接器，那么非开发人员
就可以通过配置连接器的方式来使用
Connect
。
如果你要连接的数据存储系统没有相应的连接器，那么可以考虑使用客户端
API
或
Connect API
开发一个应用程序。我们建议首选
Connect
，因为它提供了一些开箱即用的
特性，比如配置管理、偏移量存储、并行处理、错误处理，而且支持多种数据类型和标准
的
REST
管理
API
。开发一个连接
Kafka
和外部数据存储系统的小应用程序看起来很简单，
但其实还有很多细节需要处理，比如数据类型和配置选项，这些无疑加大了开发的复杂
性——
Connect
处理了大部分细节，让你可以专注于数据的传输。
7.3
Kafka Connect
Connect
是
Kafka
的一部分，它为在
Kafka
和外部数据存储系统之间移动数据提供了一种
可靠且可伸缩的方式。它为连接器插件提供了一组
API
和一个运行时——
Connect
负责运
行这些插件，它们则负责移动数据。
Connect
以 worker 进程集群的方式运行，我们基于
worker 进程安装连接器插件，然后使用
REST API
来管理和配置 connector，这些 worker
进程都是长时间持续运行的作业。连接器启动额外的 task，有效地利用工作节点的资源，
以并行的方式移动大量的数据。数据源的连接器负责从源系统读取数据，并把数据对象
提供给 worker ...
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