Path: utzoo!attcan!uunet!cs.utexas.edu!usc!henry.jpl.nasa.gov!elroy.jpl.nasa.gov!zardoz!neil
From: neil@cpd.com (Neil Gorsuch)
Newsgroups: comp.unix.ultrix
Subject: Re: DS3100: restriction on no. of TTYs per LAT service
Keywords: DS3100, LAT
Message-ID: <1989Nov25.015814.26839@cpd.com>
Date: 25 Nov 89 01:58:14 GMT
References: <1152@cernvax.UUCP>
Sender: news@cpd.com (usenet news administrator)
Reply-To: neil@uninet.UUCP (Neil Gorsuch)
Organization: Custom Product Design, Inc., Santa Ana, CA, USA
Lines: 23

In article <1152@cernvax.UUCP> jmg@cernvax.UUCP (john gerard) writes:
>We are trying to run a LAT service through a DS3100 on a lot of ttys.
>We have configured 64 ttys with MAKEDEV, and we use ttys from tty04
>for a lat/telnet service (actually a lat/tn3270 service). So far, so good.
>If we configure too many of these ttys in the /etc/ttys file then at
>some time the system goes bananas. Shells get continuously created and
>destroyed (the lat/telnet service program calls in a shell script),
>zombies abound, the CPU is 100% busy etc. etc.
>I recall that some time ago someone talked about limitations on the number
>of ttys per each multiple LAT service.

If the problem is something in the LAT software, a possible solution
is to use our SCSI serial/parallel servers.  From what I have been
told of LATs (we don't have any to compare against), they have higher
performance.  And they certainly cost a lot less than LATs and relieve
a lot of ethernet load.  Plus you get a Centronics parallel port for
each 8 serial ports.

--
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