CROWN: A Service Grid Middleware for e-Science - Grid Computing: Infrastructure, Service, and Applications - page 27

them on many grid nodes. Users can provide many ways of submitting mul-
timedia data and jobs to the grid scheduling system. After analyzing the
workload of the grid nodes, available resources can be found automatically
and data can be processed by invoking the corresponding services. Since the
platform is deployed in a wide-area environment, we also introduced the
trust management and negotiation mechanisms. These technologies protect
the user data and make the processing trustworthy. By using MDP, the
resources that can be used to process multimedia data increase, and the
throughput and dependability of processing can be much improved.
CROWN interoperates with other grid middleware through specii ca-
tions. The testbed also links to some famous grid testbeds. For example, the
gViz application is deployed in both CROWN and the White Rose Grid
(WRG), which is a part of the UK National Grid Service (NGS). We demon-
strated the application at the UK e-Science All Hands Meeting 2005 to show
the interoperability of heterogeneous and autonomic grid systems.
Our experience with system development and deployment shows that
CROWN provides the capabilities of resource management, distributed
access control, and trust management and negotiation. It can be used to sup-
port applications that are computation intensive and/or data intensive.
Eleven applications were deployed into CROWN by April 2006 and more
than 25,000 requests have been processed.
Acknowledgments
Part of this work is supported by grants from the China Natural Science
Foundation (No. 90412011, 60703056), China 863 High-tech Programme
(Project No. 2006AA01A106), China 973 Fundamental R&D Program
(No. 2005CB321803), and the National Natural Science Funds for
Distinguished Young Scholars (No. 60525209). We would also like to
thank Jianxin Li, Tianyu Wo, and Hailong Sun and other members of the
CROWN team at Beihang University for their contributions to the design
and implementations of CROWN middleware, testbed, applications, and
related resource management technologies mentioned in this chapter.
References
1. CROWN website. Available at: http://www.crown.org.cn.
2. I. Foster, C. Kesselman, J. Nick, and S. Tuecke, “The physiology of the grid:
An open grid services architecture for distributed systems integration,”
Open Grid Service Infrastructure WG, Global Grid Forum, 2002, USA.
Available at: http://www.globus.org/research/papers/ogsa.pdf.