10,815 research outputs found
A Case for Peering of Content Delivery Networks
The proliferation of Content Delivery Networks (CDN) reveals that existing
content networks are owned and operated by individual companies. As a
consequence, closed delivery networks are evolved which do not cooperate with
other CDNs and in practice, islands of CDNs are formed. Moreover, the logical
separation between contents and services in this context results in two content
networking domains. But present trends in content networks and content
networking capabilities give rise to the interest in interconnecting content
networks. Finding ways for distinct content networks to coordinate and
cooperate with other content networks is necessary for better overall service.
In addition to that, meeting the QoS requirements of users according to the
negotiated Service Level Agreements between the user and the content network is
a burning issue in this perspective. In this article, we present an open,
scalable and Service-Oriented Architecture based system to assist the creation
of open Content and Service Delivery Networks (CSDN) that scale and support
sharing of resources with other CSDNs.Comment: Short Article (Submitted in DS Online as Work in Progress
A Taxonomy of Data Grids for Distributed Data Sharing, Management and Processing
Data Grids have been adopted as the platform for scientific communities that
need to share, access, transport, process and manage large data collections
distributed worldwide. They combine high-end computing technologies with
high-performance networking and wide-area storage management techniques. In
this paper, we discuss the key concepts behind Data Grids and compare them with
other data sharing and distribution paradigms such as content delivery
networks, peer-to-peer networks and distributed databases. We then provide
comprehensive taxonomies that cover various aspects of architecture, data
transportation, data replication and resource allocation and scheduling.
Finally, we map the proposed taxonomy to various Data Grid systems not only to
validate the taxonomy but also to identify areas for future exploration.
Through this taxonomy, we aim to categorise existing systems to better
understand their goals and their methodology. This would help evaluate their
applicability for solving similar problems. This taxonomy also provides a "gap
analysis" of this area through which researchers can potentially identify new
issues for investigation. Finally, we hope that the proposed taxonomy and
mapping also helps to provide an easy way for new practitioners to understand
this complex area of research.Comment: 46 pages, 16 figures, Technical Repor
MAGDA: A Mobile Agent based Grid Architecture
Mobile agents mean both a technology
and a programming paradigm. They allow for a
flexible approach which can alleviate a number
of issues present in distributed and Grid-based
systems, by means of features such as migration,
cloning, messaging and other provided mechanisms.
In this paper we describe an architecture
(MAGDA – Mobile Agent based Grid Architecture)
we have designed and we are currently
developing to support programming and execution
of mobile agent based application upon Grid
systems
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