RFC 101 (rfc101) - Page 2 of 14
Notes on the Network Working Group meeting, Urbana, Illinois, February 17, 1971
Alternative Format: Original Text Document
RFC 101 NOTES ON THE NETWORK WORKING GROUP MEETING February 1971
Once Tree Meta was running, a new high level language (called L-
10) for programming the On-Line System (NLS) was implemented in
the same way. When L-10 was running the core device independent
parts of NLS were rewritten and debugged. NLS was completely
reorganized during the transfer.
At the SRI and Utah ends a control program allowing three users to
connect to Utah was written, which ran as a user process and
allowed character interaction and files to be transmitted. The
scheme worked well and much useful work was accomplished in the
July--December period with some people on 4-5 hours per day. The
voice link was used when something would go wrong in trying to
determine where the problem existed and to reset. At times they
would go 2 weeks with no problems. SRI has an IMP interface
diagnostic which ran as a T/S process.
Generally, echoing was handled at the SRI end. DDT was used at
Utah end. Round trip character delays of 4 seconds were not
uncommon, and at certain points delays of 8 or 10 minutes were
experienced. These delays were the result of the implementation
used which involved multiple processes at each end, each to be
scheduled. Utah was heavily loaded at 2:00 PM and the SRI people
took to running at night and on weekends.
When the SRI PDP-10 came in in December, use of the Network
slowed.
Users would have liked a more constant response time instead of
the widely varying one so that their work habits could adapt to it
even if it was slow.
Gerry Cole reported on some results of measurements made during the
SRI-Utah work. Measurements were also made at SRI to help in
interpreting the data obtained by UCLA. Gerry wrote a paper
summarizing these statistics which is available from him care of SDC.
Gerry requested that when people are set up to use the Network,
they inform him so that he can gather statistics. UCLA will
eventually have a program to scan the Network for utilization, but
if people could tell him when they were going to use the Network,
it would be easier to measure meaningful things and interpret the
data from a knowledge of type of usage.
Bob Kahn indicated that BBN is interested in the Statistics on
overall flow to see if the Network is configured properly. Gerry
said that UCLA is interested in the statistics for Network modeling
studies. Measurements are taken by remote control by use of a
feature designed into the IMP's by BBN for such a function.
Watson