Re: Progress bringing up tom4 and tom5

["Tom Droege" <droege@snapmail.us>]

Thanks to Chris, Antonio and all the others that have given suggestions.

I have run for the last couple of days using 12 virtual desktops and it is
working just fine for me.  For me the simplest solution is the best.

I realize that all six computers have to work for this solution to work. 
Well, I assume that the only key one is the one with the 12 virtual
desktops.

The usual reason for computers to go off other than old age is a
thunderstorm.  Mostly I don't operate in thunderstorms.  So everything is
working nicely and I can sit at my 24" terminal and control everything. 
Gives one a great sense of power to command all those computers from one
spot.

Tom Droege

>
>
> VNC is a good idea if you work in an MS Windows exvironment
> but X11 already has the remote display ability built-in so
> you don't need to bother with setting anything up.
>
> There are several leels of automation that can be used.
> The simplest is just opening up a terminal window loging into
> the other computers and then running the command to start up
> the software.  The problem with this is that reliablilty is
> multiplicative.  You now have two computers and if either has
> a problem the process crashes. With a chain the chance of
> failure is not "the leakest link".  You have to combine the
> probility of failure of _all_ the links.
>
> Of course the ampersign "&" solves this problem.  As for not
> seeing any error messages that might appear on the terminal
> you can send that output to a log file with something like
> foobar >& foobar.log &  or get fancy with maybe
> foobar >& foobar.`date`.log &
>
> 1) use "ssh" put put the commad to run the system in the
> ssh conand line.  Then you can put four ssh commands to
> start four telescops running all in one script.
>
> Other things to try:
> 2) Put the process in the "cron table" so that it will execute
> periodically.  Acutally you would place a script in the table
> and the script would run, say every night at 7:00pm but the script
> might check for a config file first, if no config file that
> it does not run.  When an error occures the script can send
> email to someplace.  email enabled cell phones are popular with
> many sys-admins
>
> 3) Design the system as a "daemon", that is a long runnig process
> that aalways runs whenthe computer is running.  IMO this would
> be the best way to run a data ollection system.  It would look
> at the time of day and do whatever is scheduled for that time.
>
>
>
> Chris Albertson
>   Home:   310-376-1029  chrisalbertson90278@yahoo.com
>   Cell:   310-990-7550
>   Office: 310-336-5189  Christopher.J.Albertson@aero.org
>   KG6OMK
>
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