W3C home > Mailing lists > Public > ietf-http-wg-old@w3.org > May to August 1995

Re: HTTP Session Extension draft

From: Jon Knight <J.P.Knight@lut.ac.uk>
Date: Fri, 7 Jul 1995 08:46:00 +0100 (BST)
To: Chuck Shotton <cshotton@biap.com>
Cc: Jeffrey Mogul <mogul@pa.dec.com>, Alex Hopmann <hopmann@holonet.net>, http-wg%cuckoo.hpl.hp.com@hplb.hpl.hp.com
Message-Id: <Pine.SUN.3.91.950707084055.10843F-100000@weeble.lut.ac.uk>
On Thu, 6 Jul 1995, Chuck Shotton wrote:
> >The reason is that the number of TIME_WAIT entries is directly related
> >to the number of TCP connections used.  If you use sessions (what I
> >called in my paper "persistent connections"), you need to create fewer
> >TCP connections for the same number of retrievals.  So you end up
> >with fewer TIME_WAIT entries.
> 
> This is irrelevant on platforms with a limited number of TCP/IP streams
> that can be formed. People discussing this issue are right to refer to
> "irresponsible use" of TCP/IP connections.

If you happen to have a TCP/IP implementation that doesn't permit you to
have lots of streams open, just don't bother implementing this HTTP
Session Extension in your server (or even client); things will still work
ok for the older browsers and servers that don't understand the new
protocol addition.  I don't see why those of us with sensible platforms
that might be able to take advantage of a potential performance gain
shouldn't just because a Mac can't handle lots of TCP connections without
falling over.  That's like saying inlined images in HTML should never be
used because some people use text based browsers. 

Jon

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Jon Knight, Researcher, Sysop and General Dogsbody, Department of Computer
Studies, Loughborough University of Technology, Leics., ENGLAND.  LE11 3TU.
*** Nothing looks so like a man of sense as a fool who holds his tongue ***
Received on Friday, 7 July 1995 00:47:59 EDT

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