Speaker
D. Klose
(Universidade de Lisboa, Portugal)
Description
A common LCG architecture for the Conditions Database for the time
evolving data enables the possibility to separate the interval-of-
validity (IOV) information from the conditions data payload. The two
approaches can be beneficial in different cases and separation
presents challenges for efficient knowledge discovery, navigation and
data visualization. In our paper we describe the conditions data
browser - CondDBrowser - a tool deployed in ATLAS for scientific
analysis and visualization of this data.
A wide availability and access to the overall distributed conditions
data repository was achieved through a seamless integration of the IOV
and the payload data to the user a unifying web interface that hides
the persistency storage details. Another user-friendly feature of
the tool is a simplified querying language similar to QBE (Query by
Example).
Our case study is based on the web interface developed for the
ATLAS/LCG ConditionsDB. The interaction with other payload storage
technologies, external to the ConditionsDB, will also be presented. In
particular, the integration of the NOVA database technologies.
We will discuss how the information is gathered from the ConditionsDB
and the corresponding extensions needed to enable data browsing in the
external repositories, how it is organized, and what kind of
operations (search and visualization) are allowed. We'll also present
how this interface uses the C++ API extending it to a similar PHP
interface, that can be used to browse data collected using any of the
ConditionsDB implementations.
Performance constraints are also presented and will be discussed in
detail.
Primary authors
A. Amorim
(FACULTY OF SCIENCES OF THE UNIVERSITY OF LISBON)
A. Vaniachine
(Argonne National Laboratory)
D. Klose
(Universidade de Lisboa, Portugal)
J. Castilho
(FACULTY OF SCIENCES OF THE UNIVERSITY OF LISBON)
L. Pedro
(FACULTY OF SCIENCES OF THE UNIVERSITY OF LISBON)
N. Barros
(FACULTY OF SCIENCES OF THE UNIVERSITY OF LISBON)
T. Franco
(FACULTY OF SCIENCES OF THE UNIVERSITY OF LISBON)
