NAME

       watch-multiple-mimdefangs.tcl - Keep an eye on a cluster of MIMEDefang machines

SYNOPSIS

       watch-multiple-mimdefangs.tcl [-archive] machine-1 machine-2 ... machine-N

DESCRIPTION

       watch-multiple-mimdefangs.tcl  is  a  Tk  script  that  graphically displays the status of
       mimedefang-multiplexor(8) on a cluster of machines.  Note that Tcl/Tk  8.4  or  higher  is
       required to run watch-multiple-mimdefangs.tcl.

       If  you  supply  the -archive command-line option, then watch-multiple-mimdefangs.tcl logs
       the output of md-mx-ctrl rawload for each machine.  The output for machine_name is  logged
       in:

       $HOME/.watch-multiple-mimedefangs/machine_name/data.

PREREQUISITES

       To  use  watch-multiple-mimdefangs.tcl  to  monitor  a  cluster  of machines, you need the
       following prerequisites:

       o      A UNIX-like machine with Tcl/Tk 8.4, the X window system and an  SSH  client.   You
              also need "xterm" to use some of the features.

       o      The  ability  to  SSH as root to all of the machines you want to monitor.  Ideally,
              you should be using the SSH agent so that you can SSH to the monitored machines  as
              root without being prompted for a password or pass phrase.

       o      The program md-mx-ctrl on root's path on all the machines you want to monitor.

DISPLAY

       For  each  machine  specified on the command line, watch-multiple-mimdefangs.tcl creates a
       chart with five columns.  The columns are:

       o      A button with the name of the machine.  Clicking the button pops  up  a  menu  that
              lets  you  take  various actions, as described later.  If all slaves on the machine
              are busy, the button turns yellow.

       o      A label showing the number of busy slaves in the form "busy/total", where total  is
              the total number of slaves.

       o      A label showing the average number of messages per second over the last 10 seconds.

       o      A  label  showing  the  average  number  of  milliseconds per scan over the last 10
              seconds.

       o      A chart that graphs the average number  of  busy  slaves,  the  average  number  of
              messages  per  second  and the average scan time in milliseconds, all averaged over
              the last 10 seconds.

MACHINE MENU

       If you click on a machine name, a menu with three options pops up:

       SSH    Open an xterm session and ssh as root to the machine.

       Busy Slaves
              Monitor the busy slaves on the machine.  If you click on the process-ID of a slave,
              an xterm will open up and the command "strace -s 100 -t -p pid" will be executed on
              the remote machine.  This is  Linux-specific,  but  you  can  edit  watch-multiple-
              mimdefangs.tcl  to  replace  the  command with your particular system's command for
              tracing system calls.

       Delete Remove the machine from the list of machines being monitored.

ADDING A MACHINE

       If you need to add a machine to the display, simply type the name of the  machine  in  the
       "Add Machine:" box and press Enter.

AUTHOR

       watch-multiple-mimdefangs.tcl was written by David F. Skoll.

SEE ALSO

       mimedefang.pl(8),   mimedefang-filter(5),  mimedefang(8),  mimedefang-protocol(7),  md-mx-
       ctrl(8), watch-mimedefang(8)