Re: ticlts, ticots, ticotsord ...

From: Gregory Hicks (ghicks@cadence.com)
Date: 08/09/01 

Message-Id: <200108091801.f79I1CF20505@courier.cadence.com>
Date: Thu, 9 Aug 2001 11:01:12 -0700 (PDT)
From: Gregory Hicks <ghicks@cadence.com>
Subject: Re: ticlts, ticots, ticotsord ...
To: Casper.***@sun.com, jpv@jpv.xs4all.nl, alek@ast.lmco.com

> Date: Mon, 06 Aug 2001 14:22:56 -0600 (MDT)
> From: "Alek O. Komarnitsky (N-CSC)" <alek@ast.lmco.com>
>
> > From: Casper *** <Casper.***@sun.com>
> > Subject: Re: ticlts, ticots, ticotsord ...
> >
> > >in the midst of a major renumbering operation (3 class C
reshuffles,
[...snip...]
> >
> > No, they're always needed.
> >
> > Casper
>
>
> Ummmmmmm ... I just checked ... and we have dozens of machines
> with "old" host names in /etc/net/tic*/hosts ... and we have not
> noticed any problems ... but maybe ignorance is bliss! ;-)

I would go on a clean up campaign as soon as you can.

I have found that these names are used for NFS, NIS, and a few other
services.

Having old names in /etc/net/tic*/hosts causes the OS to get confused.
Examples of this are in NFS. I have wondered why machines were trying
to find old fully qualified domain (DNS) names... Searching, I found
that when we acquired a company, typically we changed the domain portion
of the name but kept the nodename (short one). The old FQDN was in
/etc/net/tic*/hosts. As soon as I removed the old name (basically
replaced the contents of these files with the output of 'hostname' -
whatever the machine wanted to call itself was OK with me as long as we
were consistent) things started working correctly, things got faster, et
al...

Clearing out /etc/rmtab may have caused a number of 'stale NFS file
handles' when the machine rebooted, but it also got rid of any 'old'
FQDN's from the previous domain...

The script 'corrector' was what I used to fix a whole bunch of machines
late one night...

Your milage may vary...

Regards,
Gregory Hicks

>
> The vast majority of these are CAD/CAM applications, so we rarely
> boot single user ... so maybe I'm not "tickling" the case where
> these are actually used (?) ... although we do LOTS of RPC (ex: NIS).
>
> Casper implies above that they are "really" used in normal operation
...
> and Casper's advice is typically as good as gold in my book! ;-)
>
> It sounds like I'm going to need to modify our "inst scripts"
> to also tweek these files when the hostname is changed ...
> but would be nice to know a little more about what these
> are actually used for.
>
> Thanx,
> alek

---------------------------------------------------------------------
Gregory Hicks | Principal Systems Engineer
Cadence Design Systems | Direct: 408.576.3609
555 River Oaks Pkwy M/S 6B1 | Fax: 408.894.3479
San Jose, CA 95134 | Internet: ghicks@cadence.com

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