Last update:
Apr 1, 2000
|
|
|
|
The BaBar Online Computing System
|
Gregory P. Dubois-Felsmann
Caltech
for the BaBar Online Computing Group
Speaker:
Gregory P. Dubois-Felsmann
The BaBar experiment has designed and implemented its online data
acquisition, monitoring, and control system using object-oriented software
techniques. This system was used for the commissioning of the experiment
and has now been in use for some eight months in the acquisition of
colliding beam physics data. Most of the online software is written in
C++, from the embedded data acquisition processors through event building,
software triggering, database access, and user interfaces. Other components
of the system use Java and other object-oriented technologies such as CORBA
and the Objectivity OO database product.
We will present an overview of the general structure of the online
system and its relationships with other BaBar software components, and
then describe the event data acquisition and logging chain, and its
performance during BaBar operations, in more detail. We will describe
the experience of constructing a system from the ground up using OO
methodologies, and while noting pitfalls encountered and lessons
learned, we will argue that this experience has borne out in practice
many of the expected benefits of this approach. The online system has
reached, on a tight timetable, notable levels of performance and
reliability, in a complex distributed environment, and its design has
already proven to be accommodating to the phased deployment of
improved implementations of its facilities, and amenable to the
satisfaction of unanticpated requirements within its basic frameworks.
Presentation:  |
|
Bulletins
| Home | Bulletins | Committees | Scientific Program | Docs by topics | Social Event | Conference Location | Secretariat |
Privacy Policy |