NEWS RELEASE 7/9/2008
O/R Impedance Mismatch? Users Speak Up!
ODBMS.ORG, a vendor-independent non-profit group of high-profile software experts
lead by Prof. Roberto Zicari, today announced the exclusive publication of a new
series of user reports on
using technologies for storing and handling persistent objects.
"I am often asked by users who are new to ODBMS to provide untainted, objective
reports from other users who have used ODBMS before," says Roberto Zicari, editor
of ODBMS.ORG. "To meet this demand, I have started a new series of interviews with
users of technologies for storing and handling persistent objects. I define 'users'
in a very broad sense, including business line managers, CTOs, software architects,
consultants, developers, and researchers."
Today, 11 user reports have
been published, from the following users:
- Gerd Klevesaat, Siemens
- Pieter van Zyl, CSIR
- Philippe Roose, Liuppa
- William Westlake, SAIC
- Stefan Edlich, TFH Berlin
- Udayan Banerjee, NIIT
- Nishio Shuichi, ATR Labs
- John Davies, Iona
- Scott Ambler, IBM
- Mike Card, Syracuse
- Rich Ahrens, Merrill Lynch
Prof. Zicari asked each users a number of equal questions, among them if they had
an "impedance mismatch" problem. Each time data models, e.g. relational models like
in Oracle 11g, are used to persistently store data and the program language used,
e.g. in object-oriented Java, are different, this is referred to as the "impedance
mismatch" problem. Users confirmed in different ways the existence of such a problem.
"Definitely, we have [an impedance mismatch problem] as long as there is an explicit
mapping of objects to the way they are stored. Bridging that gap is tedious and
is both a cost and risk factor in the project lifecycle." says Gerd Klevesaat of
"I have done software development at a variety of companies that suffered from this
issue. One of them was a medical data warehouse." confirms William W. Westlake at
Scott Ambers of IBM Rational sees the problem differently: "The real issue that
organizations struggle with is what I call the cultural impedance mismatch which
refers to the difference in cultures that we see between the data community and
the development community."
Elimination of O/R impedance mismatch has brought significant business benefits.
"For us," says Rich Ahrens, Director at Equity Linked Trading at Merryll Lynch,
"the choice to use an object database has directly increased our ability to deliver
business solutions in the shortest time possible."
Scott Ambers: "Unfortunately too many IT professionals seem to be one-trick ponies
-- they have their data hammer and everything looks like a data nail to them."
The most frequently requested wish for new research/development in the area of object
persistence in the next 12-24 months was standardization of APIs.
ODBMS.ORG plans to continue the series of users reports on a regular base.
The complete initial series of user reports is available for
ODBMS.ORG (www.odbms.org) is a vendor-independent, not-for-profit educational program
on object database technology and the integration between object-oriented programming
and databases. Designed by Prof. Roberto Zicari of Frankfurt University, the program's
goal is to promote and further the use of object databases - by offering free resources
for students, faculty and researchers at universities and research centers, as well
as for JAVA and .NET developers in the commercial and the open source world. Content
is provided by a panel of internationally recognized experts, who share research
articles and teaching materials with the community via the organization's Web portal.
Contact ODBMS.ORG at email@example.com.