Date: Fri, 17 Aug 2001 17:03:35 -0500
From: "Eric H. Neilsen, Jr."
Subject: Re: cleanupMurmur (was Re: 2.5m obslog 20010807 (MJD 52129))
On Fri, Aug 17, 2001 at 03:47:24PM -0600, Pete Newman wrote:
> There seems to be a new option,  cleanupMurmur -killProcesses, that does
> list the processes to be removed, and gives a 'su kill' command to do it
> (in fact, the command uses double quotes in it's string - these should be
> single quotes).
Yes, this is an option that is present. It hasn't really been shaken
formally at the mountain, but ran well when I tested it remotely
during shutdown.
>
> In the shakedown plan, Eric said he would implement an automatic
> cleanupMurmur in a cron job or endNight.  Did this happen?  If so, do we
> no longer run cleanupMurmur ourselves?  Also, will the cron job tell us if
> it fails?
This did not happen for the following reason: if it were run by a cron
there would be a good possibility that someone doing work when the
cron job "went off" might be using a murmur log, and not realize that
whatever processes was using it (startMurmur, etc.) needed to be
restarted to keep getting it. Imaging if someone were checking the
fiducials when the cron job restarted murmur. It would appear that no
fiducials were getting crossed (as the new entries would be going to
the new murmur log) and nothing suspicious from the fiducializers end
(grepping for tlatch would hide the "end of murmur log" message.)  If
cleanupMurmur is something done from a command line by an observer,
others should be in sufficient communication with the observers for
this not to happen.
This possibility of the murmur log being pulled out from under
something still being used that needs it bugs me, and Scot as well. We
decided to hold off on implementing the cron job unless someone
objects strenuously to the current situation. At present, it is much
less painful to run from the commandline, as there is no longer any
need to do anything other than just type the command.
	-Eric
--
Eric H. Neilsen, Jr. --------------- http://lagoon.fnal.gov/~neilsen