870646c@aucs.UUCP (12/07/87)
I have a question for the Amiga people, if one was to run unix or a look alike on the Amiga, how many terminals would you be able to run off it(or is there a limit) before performance is lowered to the point of no return. I know of course that this depends on what you are doing, and if you are using a hard disk or not(what an evil thought, using unix from a floppy disk). This is just a general question, but I am sure that I am not the only one asking it. later barry
dillon@CORY.BERKELEY.EDU (Matt Dillon) (12/08/87)
:I have a question for the Amiga people, if one was to run unix or a look alike :on the Amiga, how many terminals would you be able to run off it(or is there :a limit) before performance is lowered to the point of no return. I know :of course that this depends on what you are doing, and if you are using a hard :disk or not(what an evil thought, using unix from a floppy disk). :This is just a general question, but I am sure that I am not the only one :asking it. As far as UNIX is concerned, the major problem is (a) memory and (b) IO bandwidth. (a) memory isn't too much of a problem... say use an Amiga with 8Megs and a 68020 (and a MMU of course). This leaves IO bandwidth. To be at all usefull, you would want two harddrives and separate DMA channels for each. Use one harddrive for swap (make it a 40Meg HD). The more (or larger) HD's the merrier! That would be roughly equivalent to, say, a VAX 750 in terms of performance. -Matt
richard@gryphon.CTS.COM (Richard Sexton) (12/10/87)
In article <636@aucs.UUCP> 870646c@aucs.UUCP (barry comer) writes: >I have a question for the Amiga people, if one was to run unix or a look alike >on the Amiga, how many terminals would you be able to run off it(or is there >a limit) before performance is lowered to the point of no return. I know >of course that this depends on what you are doing, and if you are using a hard >disk or not(what an evil thought, using unix from a floppy disk). >This is just a general question, but I am sure that I am not the only one >asking it. /* Smart ass answer */ 1 more that your precious Mega ST thing, Barry. /* real answer */ Well, lessee, how you gonna hook up these terminals ? On a 1000 you only have 1 serial port, so thats right out. On a 2000 you could plug in AT smart 8 port serial cards and connect them to terminals. But now who is to say what the "point of no return" is ? The 286 Xenix box that is gryphon.cts.com has four lines going into it and sometimes bogs down to 15-20 seconds response time. Other times it is quite zippy. Probably a rough answer would be to start opening a bunch of windows, and start something like 10: dir 20: goto 10 in each window, and decide for yourself at what point performence degrades to the point where YOU think it is intolerable. Of course, a 2000 with a 68020, 8 megs, and a 35 ms. hard disk with 2 eight port cards is probably not unreasonable. As long as you dont expect your concurrent ray-trace to finish quickly... -- Richard J. Sexton INTERNET: richard@gryphon.CTS.COM UUCP: {hplabs!hp-sdd, sdcsvax, ihnp4, nosc}!crash!gryphon!richard "It's too dark to put the keys in my ignition..."
roch@uiucdcsb.cs.uiuc.edu (12/13/87)
/* Written 10:01 pm Dec 9, 1987 by richard@gryphon.CTS.COM in uiucdcsb:comp.sys.amiga */ /* ---------- "Re: How many terminals?" ---------- */ In article <636@aucs.UUCP> 870646c@aucs.UUCP (barry comer) writes: >I have a question for the Amiga people, if one was to run unix or a look alike >on the Amiga, how many terminals would you be able to run off it(or is there >a limit) before performance is lowered to the point of no return. I know >of course that this depends on what you are doing, and if you are using a hard >disk or not(what an evil thought, using unix from a floppy disk). >This is just a general question, but I am sure that I am not the only one >asking it. /* Smart ass answer */ 1 more that your precious Mega ST thing, Barry. /* real answer */ Well, lessee, how you gonna hook up these terminals ? On a 1000 you only have 1 serial port, so thats right out. On a 2000 you could plug in AT smart 8 port serial cards and connect them to terminals. But now who is to say what the "point of no return" is ? The 286 Xenix box that is gryphon.cts.com has four lines going into it and sometimes bogs down to 15-20 seconds response time. Other times it is quite zippy. Probably a rough answer would be to start opening a bunch of windows, and start something like 10: dir 20: goto 10 in each window, and decide for yourself at what point performence degrades to the point where YOU think it is intolerable. Of course, a 2000 with a 68020, 8 megs, and a 35 ms. hard disk with 2 eight port cards is probably not unreasonable. As long as you dont expect your concurrent ray-trace to finish quickly... -- Richard J. Sexton INTERNET: richard@gryphon.CTS.COM UUCP: {hplabs!hp-sdd, sdcsvax, ihnp4, nosc}!crash!gryphon!richard "It's too dark to put the keys in my ignition..." /* End of text from uiucdcsb:comp.sys.amiga */