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Date:      Wed, 17 Sep 1997 20:46:14 +0200 (MET DST)
From:      Luigi Rizzo <luigi@labinfo.iet.unipi.it>
To:        jkh@time.cdrom.com (Jordan K. Hubbard)
Cc:        md6tommy@mdstud.chalmers.se, freebsd-hackers@FreeBSD.ORG
Subject:   Re: CDROM image
Message-ID:  <199709171846.UAA08323@labinfo.iet.unipi.it>
In-Reply-To: <20322.874510892@time.cdrom.com> from "Jordan K. Hubbard" at Sep 17, 97 08:41:13 am

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> You mean they make it available for FTP?
> 
> Sure, I could do that easily, I've just never knew that anyone would
> really _want_ a 640MB file to download.  What do other folks think?

My humble opinion is that, since building a CD image locally is so
difficult, it could be quite nice to have such a thing. Of course
there is no hope to download the file unless you have a permanent
connection to the net and an ftp client which can restart an
interrupted transfer (fetch ?) or the server can split the file in
pieces for late reassembly.

It would be much nicer if we could use reliable multicast to send the
image to multiple clients. How about an sdr session "FreeBSD 2.2.5
vol.1", at 128 Kbit/s is just 11 hours... put in some 20% losses and 80%
protocol efficiency, you can still manage to feed all the mirrors in little
less than one day!

Too bad ftp.freebsd.org is not on the mbone...  My rmdp program
available from my web page research.html can do reliable multicast
for large groups but I never tried it with such large files...

	Cheers
	Luigi
-----------------------------+--------------------------------------
Luigi Rizzo                  |  Dip. di Ingegneria dell'Informazione
email: luigi@iet.unipi.it    |  Universita' di Pisa
tel: +39-50-568533           |  via Diotisalvi 2, 56126 PISA (Italy)
fax: +39-50-568522           |  http://www.iet.unipi.it/~luigi/
_____________________________|______________________________________



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