Flink官网
https://flink.apache.org/
阿里flink开发文档
https://help.aliyun.com/product/45029.html?spm=a2c4g.11174283.6.540.5b0b1e49qtnTwn
Flink流处理（Stream API）- Operators（操作数据流）
https://blog.csdn.net/zpf_940810653842/article/details/99751920#datastream-transformations
反压
https://www.cnblogs.com/ljygz/p/11837033.html 发送端反压Credit
https://www.cnblogs.com/ljygz/p/11807064.html 接收端反压Credit
大数据常见问题之flink五十问第二期
https://developer.aliyun.com/ask/259354?utm_content=g_1000088954
金竹flink博客
https://yq.aliyun.com/users/ohyfzrwxmb3me/article?spm=a2c4e.11155435.0.0.6e091b10X2eNpF
