He Tianyi created HDFS-8829: ------------------------------- Summary: DataNode sets SO_RCVBUF explicitly is disabling tcp auto-tuning Key: HDFS-8829 URL: https://issues.apache.org/jira/browse/HDFS-8829 Project: Hadoop HDFS Issue Type: Improvement Components: datanode Affects Versions: 2.6.0, 2.3.0 Reporter: He Tianyi
{quote} private void initDataXceiver(Configuration conf) throws IOException { // find free port or use privileged port provided TcpPeerServer tcpPeerServer; if (secureResources != null) { tcpPeerServer = new TcpPeerServer(secureResources); } else { tcpPeerServer = new TcpPeerServer(dnConf.socketWriteTimeout, DataNode.getStreamingAddr(conf)); } tcpPeerServer.setReceiveBufferSize(HdfsConstants.DEFAULT_DATA_SOCKET_SIZE); {quote} The last line sets SO_RCVBUF explicitly, thus disabling tcp auto-tuning on some system. Shall we make this behavior configurable? -- This message was sent by Atlassian JIRA (v6.3.4#6332)