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Re: [pcp] Prepare to be assimilated^Wanalysed; resistance is futile

To: Ryan Doyle <ryan@xxxxxxxxxxxx>
Subject: Re: [pcp] Prepare to be assimilated^Wanalysed; resistance is futile
From: "Frank Ch. Eigler" <fche@xxxxxxxxxx>
Date: Tue, 2 Jul 2013 09:09:43 -0400
Cc: Nathan Scott <nathans@xxxxxxxxxx>, Ken McDonell <kenj@xxxxxxxxxxxxxxxx>, Stan Cox <scox@xxxxxxxxxx>, pcp@xxxxxxxxxxx
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Hi -

> [...]  I (personally) like the idea that clients can inform a
> pmlogger that they want to be logged via a well known hostname or IP
> address that the administrator knows. DNS (and the search path)
> could do the heavy-lifting to find the right pmlogger host to talk
> to.  [...]

This would be a worthwhile complementary approach.  The degrees of freedom
seem to be:

a- pmcd passive ("I exist") vs. active ("hey you, log me") announcement
b- extra sysadmin work (identifying "hey you" in DNS) vs. automagic
c- pmlogger-server passive (listening for announcements) vs. active (probing
   DNS / network / etc.)

I suspect that doing the avahi plan (a=passive/b=automagic/c=passive),
plus the following would cover enough of the space to be useful.  The
addition could be another mode for pmlogger-server where it's given IP
address ranges to periodically scan, and then attach to pmcd's found
to be running there.  (This would be the a=passive/b=automagic/c=active
point on the taxonomy.)

- FChE

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