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Arpit Agarwal commented on HDFS-7270: ------------------------------------- Can we remove SUPPORTED2 from the enum, or at least add a comment? > Add congestion signaling capability to DataNode write protocol > -------------------------------------------------------------- > > Key: HDFS-7270 > URL: https://issues.apache.org/jira/browse/HDFS-7270 > Project: Hadoop HDFS > Issue Type: Improvement > Components: datanode > Reporter: Haohui Mai > Assignee: Haohui Mai > Attachments: HDFS-7270.000.patch, HDFS-7270.001.patch, > HDFS-7270.002.patch, HDFS-7270.003.patch, HDFS-7270.004.patch > > > When a client writes to HDFS faster than the disk bandwidth of the DNs, it > saturates the disk bandwidth and put the DNs unresponsive. The client only > backs off by aborting / recovering the pipeline, which leads to failed writes > and unnecessary pipeline recovery. > This jira proposes to add explicit congestion control mechanisms in the > writing pipeline. -- This message was sent by Atlassian JIRA (v6.3.4#6332)