rsync - Oct 2001 - Widespread implementation of rsync

I came to know about rsync algorithm for transferring files few days ago.  The
algorithm provides an efficient way to transfer files from one computer to
another over a slow communication link. But I have been wondering why  don't
we see a widespread implementation of rsync in most popular file transfer tools.

I know that the algorithm was conceived by Andrew Tridgell and Paul Mackerras
from Department of Computer Science, Australian National University. I was
thinking about implementing this algorithm in Java and make it available as a
freeware/shareware. I guess I would need some kind of permission/license to
develop a program that uses rsync.

I will appreciate if someone on the list could address these questions.

Regards

Waqas




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On Sat, Oct 27, 2001 at 08:34:14PM +0500, Java Dukes
wrote:
> I came to know about rsync algorithm for transferring files few days
> ago.  The algorithm provides an efficient way to transfer files from one
> computer to another over a slow communication link. But I have been
> wondering why  don't we see a widespread implementation of rsync in
most
> popular file transfer tools.
> 
> I know that the algorithm was conceived by Andrew Tridgell and Paul
> Mackerras from Department of Computer Science, Australian National
> University. I was thinking about implementing this algorithm in Java and
> make it available as a freeware/shareware. I guess I would need some kind
> of permission/license to develop a program that uses rsync.
I know there's no patent on it, and other people have done implementations.
The "resources" page on rsync.samba.org points to a REXX
implementation.
Josh Macdonald wrote an implementation in C
    http://sourceforge.net/projects/xdelta/
and Martin Pool has turned it into a library in C (I don't see where the
home page is -- Martin?).  I believe somebody else had talked about a java
implementation but never actually did it.

- Dave Dykstra