Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!apple!oliveb!olivey!jerry
From: jerry@olivey.olivetti.com (Jerry Aguirre)
Newsgroups: news.software.nntp
Subject: Re: Streaming NNTP
Summary: it works!
Message-ID: <43575@oliveb.olivetti.com>
Date: 24 Jun 89 06:05:50 GMT
References: <42723@oliveb.olivetti.com>
Sender: news@oliveb.olivetti.com
Reply-To: jerry@olivey.UUCP (Jerry Aguirre)
Organization: Olivetti ATC; Cupertino, Ca
Lines: 26

I have finished my changes to the server and xmit routines for the
support of a "streaming" mode.  A test of the new code used 40.8 seconds
of real time vs. 123.4 seconds for the old.  (A 67% reduction!)

This test was on an internal feed with a RTT of about 700ms.  All the
articles were previously sent and so were refused.  This is the case I
hoped to improve and I am pleased with the results.

In the case where articles are not duplicates and must be transmitted
there will also be improvement though processing speed and transmission
bandwidth will effect the results.  Setting up an accurate test is
difficult because different articles must be used otherwise the second
test will have its articles refused.  (A simple test showed a 50%
reduction in real time.)

The new mode is negotiated on connection.  Old servers complain about an
unknown command causing the xmit to fall back to the old protocol.  This
makes the new xmit completely compatible.   The server operates as
before unless the new commands are used so it is also backward
compatible.  The receiving daemon is still unbuffered and so only forks
off one rnews at a time.  What changes is the delay waiting for
articles.

Any volunteers to beta test?

					Jerry Aguirre