Enter your search terms Submit search form
	Web pdp-10.trailing-edge.com

          










                       EKONET/SENDER User's Guide



      EKONET and SENDER constitute a simple demonstration (or  test)  of
      task-to-task  communication  between two TOPS-20 systems.  In this
      demo, an input file is sent to a remote system and is then  simply
      returned,  and  the returned data is written to an output file.  A
      baud rate calculation is performed  on  the  remote  side  of  the
      DECnet  link.  To test the success of the data transfer, the input
      and output files may be compared with FILCOM.



      1.0  RUNNING EKONET

      EKONET should be started on the remote -20 system before SENDER is
      run.  EKONET does not require privileges.  It prompts for a server
      name  to  use  and  then  sleeps,  waiting  for  a  logical   link
      connection.  This connection will usually be from SENDER, although
      it could be from any program.

      When the connection is made,  data  is  read  from  the  link  and
      returned  to  the  sender.   At  end  of  file,  the baud rate and
      effective baud rate of  the  transfer  are  calculated,  and  then
      EKONET exits.


                                     NOTE

          Unlike many  server  programs,  EKONET  does  not  restart
          itself  after  a  link  has been disconnected.  It must be
          restarted manually for each new test.



      The baud rate is the number of  bits  transferred  per  second  of
      elapsed time.  The time begins when the logical link connection is
      made with SENDER, and the count of bits includes both received and
      transmitted  data.   Since  the  line  is full duplex, data can be
      moving in both directions at once, so it is theoretically possible
      to see a baud rate higher than the physical baud rate of the line.
      Do not  use  the  baud  rate  as  an  estimate  for  other  DECnet
      applications,  especially if these other programs essentially move

                                                                  Page 2


      data in one direction only.  Your performance  guess  may  be  too
      optimistic.

      The effective baud rate is the  number  of  bits  transferred  per
      second  of  runtime.   It  in no way represents a baud rate of the
      line or the capabilities of any other part of the hardware.



      2.0  RUNNING SENDER

      SENDER is started on the local  system  after  EKONET  is  started
      remotely.   It  does not require privileges.  It prompts for input
      and output filenames and the name of the DECnet file specification
      with  which  to  connect.   After  the  file  has been returned by
      EKONET, SENDER exits.



      3.0  EXAMPLE

      A sample run of EKONET and SENDER is shown below.  For the purpose
      of  a easy-to-understand example, both programs are running on the
      same node.  A  more  interesting  demonstration  would  result  by
      running EKONET on a remote TOPS-20 node.

      PTYCON> !WE HAVE SET UP TWO PTYCON JOBS
      PTYCON> WHAT ALL
      EKO(0)     7          LNEFF      EXEC       TI         0:0:2
      SND(1)     65         LNEFF      EXEC       TI         0:0:2
      PTYCON> !FIRST, START EKONET
      PTYCON> CONN EKO
      [CONNECTED TO SUBJOB EKO(0)]
      
      @EKONET
      
      DECnet File Specification (SRV:.taskname):SRV:.EKONET
      ^X
      PTYCON> !EKONET IS NOW SLEEPING, WAITING FOR A CONNECTION
      PTYCON> !NOW START SENDER
      PTYCON> CONN SND
      [CONNECTED TO SUBJOB SND(1)]
      
      @SENDER
      
      INPUT FILE NAME:TEST.TXT
      
      OUTPUT FILE NAME:TEST.CHK
      
      DECnet File Specification (DCN:node-TASK-taskname.):DCN:2102-TASK-EKONET.
      
      %EOF ENCOUNTERED
      **** EKO(0) 15:53:07 ****
      
      %EOF ENCOUNTERED

                                                                  Page 3


      
      BAUD RATE= 50400
      EFFECTIVE RATE: 604800
      @
      **** SND(1) 15:53:07 ****
      @!THE BAUD RATE IS VERY HIGH BECAUSE THIS WAS JUST
      @!A LOCAL DECNET CONNECTION
      @
      @!NOW COMPARE THE TWO FILES TO MAKE SURE THE TRANSFER
      @!OCCURRED WITHOUT ERRORS
      @FILCOM
      
      *TTY:=TEST.TXT,TEST.CHK
      
      No differences encountered
      
      *^C
      @^X
      PTYCON> KILL ALL
      PTYCON> EXIT

      [End of EKONET/SENDER User's Guide]