Ping

[David Vaughan]

On Thursday, Mar 20, 2003, at 04:01 Australia/Sydney, Ben Rubinstein 
<benr_mc at cogapp.com> wrote:
>
Ben

I saw that you were discussing with Dar using Open in Rev, as your 
spare machines are OS 9, but if you have an OS X machine a low overhead 
way to do this is to write a very short shell script in OS X to ping, 
append the output to a log file and sleep for half to one minute. Run 
that in background at low priority and it will be unnoticeable in any 
circumstance. A cron job or the next sentence's Rev app can keep the 
log to a day's data. On a spare OS 9 machine, write your Rev app which 
parses the host's log, analyses and presents events. I personally would 
find this simpler, given your resources, compared with fiddling with 
open, close and timeouts, as everything is short to write and will work 
immediately.

regards
David
>
> Actually I don't even want to ping as such, just establish whether a 
> network
> device is up and running.  We're having problems with a router that 
> keeps
> rebooting; and as a first step would like to monitor it so that we can 
> track
> how often and when this is happening: in order to establish how 
> serious the
> problem is, so we can see if there is a pattern that might give us a 
> clue as
> to the source of the problem, and to give us a baseline so that if 
> we're
> reduced to trial and error, we can see whether we're making matters 
> better
> or worse.
>
> So, two alternative questions:
>     - how could I (can I?) code a 'ping' function in Rev?
>     - what is the lowest impact method that I could use, in 
> Revolution, to
> probe a network device?
>
> Ideally I'd set up a stack on a spare machine to be probing every 60 
> seconds
> or so (it takes just under two minutes for the router to reboot, and I 
> don't
> know at what point in the process it becomes visible on the network, 
> so any
> longer than this might actually miss a rebooting incident); so I don't 
> want
> to use massive resources to do it.
>
> Any help, suggestions, code fragments etc gratefully received,
>
> TIA,
>
>   Ben Rubinstein               |  Email: benr_mc at cogapp.com
>   Cognitive Applications Ltd   |  Phone: +44 (0)1273-821600
>   http://www.cogapp.com        |  Fax  : +44 (0)1273-728866
>
>
>
>
>
>
> _______________________________________________
> use-revolution mailing list
> use-revolution at lists.runrev.com
> http://lists.runrev.com/mailman/listinfo/use-revolution
>