[HDFS-11211] Add a time unit to the DataNode client trace format

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 2.9.0, 3.0.0-alpha2
• Component/s: datanode
• Labels: newbie supportability
• Hadoop Flags: Reviewed
• Assignee: Jagadesh Kiran N
• Reporter: Akira Ajisaka
• Created: 06/Dec/16 07:20
• Updated: 07/Dec/16 09:25
• Resolved: 06/Dec/16 17:15

Description

DataNode.java

  public static final String DN_CLIENTTRACE_FORMAT =
        "src: %s" +      // src IP
        ", dest: %s" +   // dst IP
        ", bytes: %s" +  // byte count
        ", op: %s" +     // operation
        ", cliID: %s" +  // DFSClient id
        ", offset: %s" + // offset
        ", srvID: %s" +  // DatanodeRegistration
        ", blockid: %s" + // block id
        ", duration: %s";  // duration time

The time unit of the duration is nanosecond, but it is not documented.