Speaker
F. van Lingen
(CALIFORNIA INSTITUTE OF TECHNOLOGY)
Description
In this paper we report on the implementation of an early prototype
of distributed high-level services supporting grid-enabled data
analysis within the LHC physics community as part of the ARDA project
within the context of the GAE (Grid Analysis Environment) and begin
to investigate the associated complex behaviour of such an
end-to-end system. In particular, the prototype integrates a typical
physics user interface client (ROOT), a uniform web-services
interface to grid services (Clarens), a virtual data service
(Chimera), a request scheduling service (Sphinx), a monitoring
service (MonALISA), a workflow execution service (Virtual Data
Toolkit Client), a remote data file service (Clarens), a grid
resource service (Virtual Data Toolkit Server), a replica location
service/meta data catalog (RLS/POOL), an
analysis session management system (CAVES) and a fine grain monitor
system for job submission (BOSS).
For testing and evaluation purposes, the prototype is deployed across
a modest sized U.S. regional CMS Grid Test-bed (consisting of sites
in California, Florida, Fermilab) and is in the early stages of
exhibiting interactive remote data access demonstrating interactive
workflow generation and collaborative data analysis using
virtual data and data provenance, as well as showing non-trivial
examples of policy based scheduling of requests in a resource
constrained grid environment. In addition, the prototype is used to
characterize the system performance as a whole, including the
determination of request-response latencies in a distributed service
model and the classification of high-level failure modes in a complex
system.
Authors
A. Anjum
(NUST, Pakistan)
C. Steenberg
(California Institute of Technology)
D. Bourilkov
(University of Florida)
F. van Lingen
(CALIFORNIA INSTITUTE OF TECHNOLOGY)
H. Newman
(Caltech)
I. LeGrand
(California Institute of Technology)
J. Bunn
(California Institute of Technology)
J. Uk In
(University of Florida)
L. Chitnis
(University of Florida)
M. Kulkarni
(UNIVERSITY OF FLORIDA)
M. Thomas
(California Institute of Technology)
P. Avery
(University of Florida)
R. Cavanaugh
(University of Florida)
T. Azim
(NUST, Pakistan)
