实时计算 Flink版工作原理的相关内容

文章 2023-12-12 来自：开发者社区

Flink CDC的工作原理是通过监听数据库的变更事件

Flink CDC的工作原理是通过监听数据库的变更事件，然后将这些变更事件应用到视图（View）上，从而实现数据的同步。如果你的视图被优化拆分为两个部分，那么Flink CDC需要分别对这两个部分进行同步。在Flink中，视图（View）是一个虚拟表，它基于其他表的查询...

文章 2023-11-12 来自：开发者社区

这个问题可能与Flink CDC SQL server2016和CDC2.4.1的工作原理有关

这个问题可能与Flink CDC SQL server2016和CDC2.4.1的工作原理有关。在启动时，将StartupOptions设置为initial意味着Flink将从初始状态开始处理数据流。而开启checkpoint可能会导致全量同步的数据变多，这可能是因为checkpoint会触发Flink重新处理从初始状态开始的所有数据。另一方面，如果不开...

文章 2023-10-25 来自：开发者社区

Flink CDC的工作原理是通过监听数据库的binlog来实现实时数据同步的

Flink CDC的工作原理是通过监听数据库的binlog来实现实时数据同步的。一般来说，如果数据库的binlog输出速度正常，Flink CDC应该能够实时接收到所有的数据变更。然而，如果你在两个小时内只收到了一条UPDATE操作，可能有以下几种原因：数据库的binlog输出速度慢：这可能是由于数据库的负载...

文章 2023-03-09 来自：开发者社区

watermark 我们从英文单词拆解翻译，就是水位线。既然是水位线，所以我觉得通过试管（化学实验器皿）来描述这个最合适不过了。 flink引入窗口机制是为了处理无序数据流入的问题，那么窗口什么时候触发呢，那么必须约定一个全局的时间点，这个时间点就是waterMark。举例：我们往试管里面倒入水（偶尔是持续的偶尔是断断续续的）同时要观察试管里面水的读数并记录下来，并且规定每增加20ml的水做一.....

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更新时间 2023-12-21 14:44:45

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实时计算Flink版

阿里云实时计算Flink版(Alibaba Cloud Realtime Compute)，完全兼容开源的Apache Flink，比开源性能提升2～3倍，提供了完整的告警、监控、日志的解决方案、提升开发效率且无运维成本，并有社区专家提供技术支持。

立即开通

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产品文档

实时同步

MySQL 到 Hologres

Kafka 到 Hologres

功能对比

开源Flink对比

成本优化

作业自动调优