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O'Reilly Platform
book
Flink基础教程
by
Ellen Friedman
,
Kostas Tzoumas
August 2018
Intermediate to advanced
98 pages
2h 11m
Chinese
Posts & Telecom Press
Content preview from
Flink基础教程
有状态的计算
|
67
增长的情况(如
tweet
)。
2016
年
2
月,
data Artisans
的博客发表了一篇文
章
3
,对
Yahoo! Streaming Benchmark
进行了拓展,并专注于解决上述问题。
由于最初的测试结果显示
Spark Streaming
的性能欠佳,因此这次的测试对
象只有
Storm
和
Flink
,它们在最初的测试中有着类似的表现。
第
1
个变化是利用
Flink
提供的状态容错特性重新实现应用程序,如图
5-15
所示。这使得应用程序能保证
exactly-once
。
数据
生成
输入
解析
/
过滤
/
转换
按照
id
分组
窗口/聚合
查询
图
5-15
:重新实现的应用程序利用了
Flink
内置的状态机制,并且可以保持每秒
300
万事件的吞吐量,同时保证
exactly-once
。此时,应用程序的瓶颈在于
Flink
集
群与
Kafka
集群的连接(图中以粗箭头表示)
5.5.3
变化
2
:
改进数据生成器并增加吞吐量
第
2
个变化是通过用每秒可以生成数百万事件的数据生成器来增加输入流
的数据量。结果如图
5-16
所示。
注
3
:
https://data-artisans.com/blog/extending-the-yahoo-streaming-benchmark
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Publisher Resources
ISBN: 9787115490063