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Window TOP-N需要同时遵循Window TVF和Top-N两者的修改要求，支持的兼容性修改较少。本文为您介绍Window Top-N变更的可兼容性和不可兼容性详情。

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文章 2017-10-19 来自：开发者社区

Flink原理与实现系列文章： Flink 原理与实现：架构和拓扑概览Flink 原理与实现：如何生成 StreamGraphFlink 原理与实现：如何生成 JobGraphFlink原理与实现：如何生成ExecutionGraph及物理执行图Flink原理与实现：Operator Chain原理Flink原理与实现：详解Flink中的状态管理在阅读本文之前，请先阅读Flink 原理与实现：....

文章 2016-11-24 来自：开发者社区

Flink 原理与实现：Window 机制

Flink 认为 Batch 是 Streaming 的一个特例，所以 Flink 底层引擎是一个流式引擎，在上面实现了流处理和批处理。而窗口（window）就是从 Streaming 到 Batch 的一个桥梁。Flink 提供了非常完善的窗口机制，这是我认为的 Flink 最大的亮点之一（其他的亮点包括消息乱序处理，和 checkpoint 机制）。本文我们将介绍流式处理中的窗口概念，介绍 ....

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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