Re: [PR] HDFS-17397. Choose another DN as soon as possible, when encountering network issues [hadoop]

Thu, 28 Mar 2024 00:39:01 -0700 


xleoken commented on PR #6591:
URL: https://github.com/apache/hadoop/pull/6591#issuecomment-2024587940

   @Hexiaoqiao I tried to learn more about the `DataStreamer`.
   
   1、Write
   
![image](https://github.com/apache/hadoop/assets/95013770/879b0456-dc5b-42eb-8852-b98a922dddd7)
   
   2、Default block size: 128MB, packet size: 64KB, Add debug log, DataStreamer 
-> ResponseProcessor
   
![image](https://github.com/apache/hadoop/assets/95013770/874d2099-dd89-4bcd-a19c-5b1789ced534)
   
   3、Simulate error exception
   
![image](https://github.com/apache/hadoop/assets/95013770/826754fa-1c23-43da-8df3-e26a697d1f78)
   
   4、`dfs.datanode.socket.write.timeout` and 
`dfs.client.slow.io.warning.threshold.ms`
   
![image](https://github.com/apache/hadoop/assets/95013770/94eebd1c-4613-4e8f-97b6-bdbcf7deca0c)
   


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