kurt@pprg.unm.edu (Kurt Zeilenga [LANL]) (02/24/89)
I was asked how would I connect 200 or so terminals to a Multimax running the BSD'ish Unix. Just finished reading pty(4) and they only meantion three sets (tty[p-r]*) or 48 psuedos. I looked at the 4.3 sources on our VAX and it appears to me that you can config any multiple of 16 (true?). So, question: How many psuedos can I actually configure (and how)? Other comments would be appreciated. Please send e-mail if not appropriate for whole discussion group. Thanks, Kurt
clyde@ut-emx.UUCP (Head UNIX Hacquer) (02/24/89)
You can set the limit of ptys in UMAX 4.2 by changing /Umax.param using /etc/sysparam. You can go up to 1024 ptys. Then you make devices in /dev. Now, if you need Annex >slave< ttys, then you can only create 100 of them using mkrnod (there is a limit built in). There is a way to take get around that limit if you really need to (if we add any more Annex boxes we will have to). -- Shouter-To-Dead-Parrots @ Univ. of Texas Computation Center; Austin, Texas clyde@emx.utexas.edu; ...!cs.utexas.edu!ut-emx!clyde "You really have to take a broad perspective when giving pat answers to other people's problems." - Eyebeam
m4@UX.ACSS.UMN.EDU (03/01/89)
I have set up the pseudo-terminals to 256 on my machine.
It is necessary to change "telnetd", "rlogind", "script".
("screen", "gnuemacs", "wm", ...). I changed the first three only,
and they randomly choose a starting port, and then sequentially continue
until they find an open one. It takes a very long time to search thru
that many pseudo-ports.
I talked with Mike at Usenix, and he suggested an datagram program that
manages the ports. I shall be assigning a programmer to this task next
week. Hopefully this will make this fall's "mips" release out of Berkeley.
(After 352, you must re-think the algorithm for naming the pseudo ports.).)