Hi, In the link, http://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-hdfs/hdfs-default.xml,
the explanation: dfs.domain.socket.path is that: "Optional. This is a path to a UNIX domain socket that will be used for communication between the DataNode and local HDFS clients. If the string "_PORT" is present in this path, it will be replaced by the TCP port of the DataNode." I am trying to evaluate the short-circuit read and find that typically this dfs.domain.socket.path is used in conjunction to enabling the short circuit for HDFS. I am using Hadoop 1.1.2. And from the source code of Hadoop 1.1.2, I can not find the configuration parameter of this "dfs.domain.socket.path" and I wonder whether this parameter setting only gets used by Hadoop 2.* release? Could you provide explanation on this about the Hadoop version support? Regards, Jun
