实时计算 Flink版聚合的相关内容

阿里云文档 2023-06-01

如何针对资讯聚合类业务场景搭建基于云消息队列Kafka版和实时计算Flink的实时数仓

本文介绍如何针对资讯聚合类业务场景搭建基于云消息队列 Kafka 版和实时计算Flink的实时数仓。

文章 2020-04-20 来自：开发者社区

Flink 消息聚合处理方案

微博机器学习平台使用 Flink 实时处理用户行为日志和生成标签，并且在生成标签后写入存储系统。为了降低存储系统的 IO 负载，有批量写入的需求，同时对数据延迟也需要进行一定的控制，因此需要一种有效的消息聚合处理方案。在本篇文章中我们将详细介绍 Flink 中对消息进行聚合处理的方案，描述不同方案中可能遇到的问题和解决方法，并进行对比。基于 flatMap 的解决方案这是我们能够想到最直观....

问答 2019-11-22 来自：开发者社区

flink 有那种把多条消息聚合成一条的操作吗，比如说每五十条聚合成一条

flink 有那种把多条消息聚合成一条的操作吗，比如说每五十条聚合成一条本问题来自阿里云开发者社区的【11大垂直技术领域开发者社群】。点击这里欢迎加入感兴趣的技术领域群。

问答 2018-12-11 来自：开发者社区

Flink - 如何在多个任务槽中聚合和查询富接收器功能状态

我实现了一个rich sink函数，它根据调用的对象执行一些网络调用。我希望能够计算这些事件的一些元数据，这些事件由事件中包含的某些上下文信息（事件的batchID）键入，并将此元数据公开给外部系统。例如，事件如下所示：case class MyEvent(batchId: String, eventId: String, moreInformation: ...)class MySink(......

问答 2018-12-11 来自：开发者社区

Flink窗口：聚合和输出到接收器

我们有一个数据流，其中每个元素都是这种类型： id: Stringtype: Typeamount: Integer我们希望聚合此流并输出amount每周一次的总和。当前解决方案示例flink管道将如下所示： stream.keyBy(type) .window(TumblingProcessingTimeWindows.of(Time.days(7))) .reduce(sumAm...

问答 2018-12-06 来自：开发者社区

Flink Table / SQL API：在会话窗口聚合后修改rowtime属性

是否可以rowtime在第一次session聚合后修改属性，使其等于.rowtime会话中最后一次观察到的事件？我正在尝试做这样的事情：table .window(Session withGap 2.minutes on 'rowtime as 'w) .groupBy('w, 'userId) .select('userId, ('w.end.cast(Types.LONG) - 'w....

问答 2018-12-06 来自：开发者社区

Apache Flink - 每小时聚合数据的每日汇总

我有一个窗口小时聚合的DataStream。 DataStream ds = ..... SingleOutputStreamOperator hourly = ds.keyBy(HourlyCountersAggregation.KEY_SELECTOR) .timeWindow(Time.hours(1)) .aggregate(new Hourly...

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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

产品控制台

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