(1) 初识Flink

Flink是什么

Apache Flink is a framework and distributed processing engine for stateful computations over unbounded and bounded data streams. Flink has been designed to run in all common cluster environments, perform computations at in-memory speed and at any scale.

特点

unbounded data: 有头无尾

bounded data: 有头有尾

都可以用Flink来处理，对应的就是流处理和批处理

Layered APIs

3. 对比

Spark：Streaming 结构化流 批处理为主 流式处理是批处理的一个特例（mini batch）

Flink：流式为主 批处理是流式处理的一个特例

Storm：流式 Tuple

使用案例

Event-driven Applications

Fraud detectionAnomaly detectionRule-based alertingBusiness process monitoringWeb application (social network)

Data Analytics Applications

Quality monitoring of Telco networksAnalysis of product updates & experiment evaluation in mobile applicationsAd-hoc analysis of live data in consumer technologyLarge-scale graph analysis

Data Pipeline Applications

Real-time search index building in e-commerceContinuous ETL in e-commerce