Re: [Linux-decnet-user] naive LAT question regarding speed

[Zube <Zu...@CS...>]

On Fri Aug 19 07:45:19 AM, Patrick Caulfield wrote:

> 
> Could you tell me more about what you are doing? I know that "reverse" 
> LAT is slower by about a factor of 1.8 or so but I've never heard of 
> those sort of orders of magnitude. Normal terminal access, in my 
> experience, is limited by the speed of the serial line between the 
> terminal and the server.

Thanks for getting back to me.

The setup is a few dumb terminals (and a couple of scanners attached to
dumb terminals) hooked to a DecServer 200.  The logins on the Debian
Thinkpad machine automatically rlogin to another machine where the programs
are run, but I don't believe the problem is between the Thinkpad and
the remote machine.

For example, when I do:

c linux 

from the local prompt, I immediately get a login prompt.  But for a three
character account, say abc, typed immediately after the prompt appears, 
the sequence appears this way:

ab <delay> c

Another example:  There is a program that is "downloaded" to a scanner
attached to a dumb terminal.  The code is displayed on the screen as
it is processed by the scanner.  When the DECStation was in place, the
code scrolled by at a regular, if unimpressive, clip; now, it scrolls
at the same unimpressive clip for a few lines and then stops for several
seconds, then continues for a few more lines and stops, etc.  It all works,
but the hangs make it tough to work with.

Perhaps I will try to put Debian + the lat software on a different machine.
I've seen stranger things occur with Thinkpads; it was just a very 
convenient choice.

Thanks again for any advice.

Cheers,
Zube