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markdown-file/Flink-Install-And-Settings.md

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- 最终我选择了:Apache 1.7.0 Flink only Scala 2.11,共:240M
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- 解压:`tar zxf flink-*.tgz`
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- 进入根目录:`cd flink-1.7.0`,完整路径:`cd /usr/local/flink-1.7.0`
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- 启动:`cd /usr/local/flink-1.7.0 && ./bin/start-cluster.sh`
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- 停止:`cd /usr/local/flink-1.7.0 && ./bin/stop-cluster.sh`
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- 改下目录名方便后面书写:`mv /usr/local/flink-1.7.0 /usr/local/flink`
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- 启动:`cd /usr/local/flink && ./bin/start-cluster.sh`
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- 停止:`cd /usr/local/flink && ./bin/stop-cluster.sh`
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- 查看日志:`tail -300f log/flink-*-standalonesession-*.log`
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- 浏览器访问 WEB 管理:`http://192.168.0.105:8081`
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## Demo
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- 运行程序解压包下也有一些 jar demo:`cd /usr/local/flink-1.7.0/examples`
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- 运行程序解压包下也有一些 jar demo:`cd /usr/local/flink/examples`
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- 官网:<https://ci.apache.org/projects/flink/flink-docs-release-1.7/examples/>
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- DataStream API:<https://ci.apache.org/projects/flink/flink-docs-release-1.7/dev/datastream_api.html>
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- DataSet API:<https://ci.apache.org/projects/flink/flink-docs-release-1.7/dev/batch/>
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- 可以直接在 IntelliJ IDEA 上 run
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- 也可以交给服务器上 flink 执行,也有两种方式:
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- 把 jar 自己上传 Flink 服务器运行:`cd /usr/local/flink-1.7.0 && ./bin/flink run -c com.youmeek.WordCount /opt/flink-simple-demo-1.0-SNAPSHOT.jar`
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- 把 jar 自己上传 Flink 服务器运行:`cd /usr/local/flink && ./bin/flink run -c com.youmeek.WordCount /opt/flink-simple-demo-1.0-SNAPSHOT.jar`
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- 也可以通过 WEB UI 上传 jar:<http://192.168.0.105:8081/#/submit>
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- 有一个 `Add New` 按钮可以上传 jar 包,然后填写 Class 路径:`com.youmeek.WordCount`
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- `parallelism` 表示并行度,填写数字,一般并行度设置为集群 CPU 核数总和的 2-3 倍(如果是单机模式不需要设置并行度)

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