Well, the LRA model as I read it seems to be a relatively close mapping
of sagas, which were as far as I know first described in 1987 by
Garcia-Molina. I think it would be useful if someone took the action to
provide a more detailed breakdown of what exactly is at issue for the
group, because it's not obvious to me after a cursory review of the
CheeTah papers.
Guy Pardon wrote:
Hi everyone,
The VLDB paper is attached. It describes composite systems in the
CheeTah prototype (which served as the provisional application for the
US patent).
Concerning WS-CAF, I think there may be some overlapping with the LRA
model described in the TXM spec.
It was not my intention to raise panic and 'warn' anybody, rather just
to point out that the patent exists (which is, I believe, required on
behalf of TC members).
Best,
Guy
On dinsdag, dec 9, 2003, at 20:27 Europe/Brussels, Mark Little wrote:
Robin, thanks. I think a description from Guy about how
he
thinks any patent
relevant to this paper may conflict with WS-CAF is in order though.
Many
companies have been doing composite applications/transactions for
years so
I'd like to know what aspect of CheeTah may either impact WS-CAF now
or in
the future. This is certainly the first I've heard of CheeTah so from
an
Arjuna perspective it certainly didn't influence WS-CAF, but maybe
Guy's
email is intended to just warn the TC in its future directions?
Mark.
----- Original Message -----
From: "Robin Cover" <>
To: "Newcomer, Eric" <>
Cc: "Guy Pardon" <>;
<>
Sent: Tuesday, December 09, 2003 7:08 PM
Subject: RE: [ws-caf] Patent Issue(s)
Perhaps:
CheeTah: a Lightweight Transaction Server for
Plug-and-Play Internet Data Management
-------------------------------------------
Guy Pardon, Gustavo Alonso.
-------------------------------------------
Abstract:
The ability to maintain transactional interaction
in a distributed system has proven to be a key feature
in information systems. Unfortunately, as technology moves
towards more distribution and decentralization, it becomes
increasingly difficult to use existing transactional
tools. In fact, current solutions are entirely unsuitable
for what we call composite systems. Composite systems
can be characterized as a collection of distributed,
autonomous components, linked in an arbitrary configuration.
In this paper, we describe CheeTah, a Java based set of
tools for building composite components capable of
interacting transactionally in arbitrary, dynamically
changing configurations. We describe the technology provided,
how designers would use it to build composite transactional
systems, and examine in detail the performance of the
resulting solution. Among the results we have achieved,
the performance and the simplicity of use are of particular
interest.
http://www.inf.ethz.ch/department/IS/iks/publications/pa2000.html
http://www.inf.ethz.ch/department/IS/iks/publications/files/pa2000.pdf
-----------------------------------------------------
Robin Cover
XML Cover Pages
WWW: http://xml.coverpages.org
Newsletter: http://xml.coverpages.org/newsletter.html
On Tue, 9 Dec 2003, Newcomer, Eric wrote:
Guy,
To second Mark's email, can you please also send additional information
about the patent, such as the VLDB paper you
mention.
Thanks,
Eric
-----Original Message-----
From: Guy Pardon [mailto:]
Sent: Tuesday, December 09, 2003 9:53 AM
To:
Subject: [ws-caf] Patent Issue(s)
Hi all,
As a TC member it is my duty to report that there exists a US patent
(US
patent application 09/682,969 -- finally approved
about two months ago)
concerning composite systems and an additional European application
being in
process. This patent is probably relevant to the CAF specs (and most
likely
to BTP as well).
Basically, the patent is an extension of the Composite Systems VLDB
paper we (Gustavo Alonso and I) had at VLDB2000.
Best,
Guy
Dr. Guy Pardon ( )
Atomikos: Your Partner for Reliable eBusiness Coordination
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The information in this email is confidential and only meant for the
addressee(s). The content of this email is
informal and will not be legally
binding for Atomikos.
Dr. Guy Pardon ( )
Atomikos: Your Partner for Reliable eBusiness Coordination
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The information in this email is confidential and only meant for the
addressee(s). The content of this email is informal and will not be
legally binding for Atomikos.
