code: private static void usage()
    {
      String className = MStress_Client.class.getName();
      System.out.printf("Usage: java %s -s dfs-server -p dfs-port" +
      		"[-t [create|stat|read|readdir|delete|rename] -a planfile-path -c host -n process-name" +
      		" -P prefix]\n",
                        className);
      System.out.printf("   -t: this option requires -a, -c, and -n options.\n");
      System.out.printf("   -P: default prefix is PATH_.\n");
      System.out.printf("eg:\n");
      System.out.printf("    java %s -s <metaserver-host> -p <metaserver-port> -t create" +
      		" -a <planfile> -c localhost -n Proc_00\n", className);
      System.exit(1);
    }
docs: Prints usage information to standard out.