Seeking advice on non-interactive ethernet data transfer
Noel Bell
chcu275 at ut-emx.UUCP
Thu Sep 22 06:40:30 AEST 1988
I would appreciate advice and information on an ethernet application.
The application involves transferring data between an AT running SCO
Xenix V2.1 and one of several machines on an ethernet network. The
possible machines include uVax's, a Sun, a TI Explorer and just
about anything our department might buy in the near future.
The AT serves as an operator interface for controlling a laboratory
reactor system. The AT also currently serves as the "number cruncher".
Future projects will require more cpu power for number crunching.
Rather than buy a more powerful machine to replace the AT, we would
like to utilize resources which are available on the ethernet. This
would also provide many more options in the future as funding for
this project alone could probably not support a Sun4 or whatever
the latest hot hardware is.
The data transfer will involve sending and receiving by both machines
( the AT and whatever on the other end of the ethernet ) on the order
of every 30 seconds. This must be done without user interaction and
I would hope with a response time of less than 1 second. ( We can control
or limit the load on both machines ). The AT will send reactor data
to the number cruncher along with other parameters and the number
cruncher will return setpoints determined by some control algorithm.
I am familiar with programs such as "ftp" used for interactive
file transfers over ethernet. Is there a software package available
which would allow us to write our own, non-interactive data transfer
program? Has somebody already written such a package? Do ethernet
boards and drivers usually come with development software? The same
package would hopefully be available under VAX-VMS, SunOS, Unix SysV,
etc.
Also, what ethernet hardware for the AT would be the best?
Thanks for any information you can provide. ( Vendors' replies
welcome )
Noel Bell
Department of Chemical Engineering
University of Texas at Austin
chcu275 at ut-emx
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