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   Re: XML over HTTP: SOAP and ...?

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  • From: David Brownell <david-b@pacbell.net>
  • To: "Box, Don" <dbox@develop.com>, jim@anconafamily.com, xml-dev@xml.org
  • Date: Wed, 08 Mar 2000 21:03:31 -0800

RE: XML over HTTP: SOAP and ...?
----- Original Message ----- 
From: Box, Don 

> > From: Jim Ancona [mailto:scarhill@yahoo.com] 
> > 
> > The definitive paper on this problem is "A Note on Distributed 
> > Computing" by Jim Waldo, Geoff Wyant, Ann Wollrath, and Sam Kendall. 
> > It's well worth reading for anyone working on distributed systems.  
> > 
> >            These differences are required 
> >    because distributed systems require that the programmer be aware of 
> >    latency, have a different model of memory access, and take 
> >    into account issues of concurrency and partial failure." 

I think it was actually Butler Lampson that pointed out partial
failure modes as the most fundamental issue.

> > Some of the authors are the designers of RMI, so RMI at least tries to 
> > deal with these issues. 
> ... Its ironic that Waldo and Wollrath wrote that document in 1994 and
> then went off and did RMI

Sun wanted proprietary RPC-ish systems at that point, and that paper
captured much of the debate that had been paralysing Sun's CORBA teams.

Basically, it was the choice between the original vision (loosely coupled
distributed system tools) or one of several newer ones (distributed GUI
toolkit, OS, etc) that depended on there being no partial failures.  None
of them really was allowed to achieve anything at the time.

- Dave

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