实时计算 Flink版案例topn 的相关内容

文章 2024-04-24 来自：开发者社区

[尚硅谷flink学习笔记] 实战案例TopN 问题

实时统计一段时间内的出现次数最多的水位。* 例如，统计最近10秒钟内出现次数最多的两个水位，并且每5秒钟更新一次。* 我们知道，这可以用一个滑动窗口来实现。于是就需要开滑动窗口收集传感器的数据，按照不同的水位进行统计，而后汇总排序并最终输出前两名。这其实就是著名的“Top N”问题。全窗口 ...

文章 2023-02-07 来自：开发者社区

诉求：网站中一个非常经典的例子，就是实时统计一段时间内的热门 url。例如，需要统计最近10 秒钟内最热门的两个 url 链接，并且每 5 秒钟更新一次。我们知道，这可以用一个滑动窗口来实现，而“热门度”一般可以直接用访问量来表示。于是就需要开滑动窗口收集 url 的访问数据，按照不同的 url 进行统计，而后汇总排序并最终输出前两名。这其实就是著名的“Top N”问题。很显然，简单的增量聚合可....

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更新时间 2024-04-30 03:30:25

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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