58,424 research outputs found
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
A Fault Tolerant, Dynamic and Low Latency BDII Architecture for Grids
The current BDII model relies on information gathering from agents that run
on each core node of a Grid. This information is then published into a Grid
wide information resource known as Top BDII. The Top level BDIIs are updated
typically in cycles of a few minutes each. A new BDDI architecture is proposed
and described in this paper based on the hypothesis that only a few attribute
values change in each BDDI information cycle and consequently it may not be
necessary to update each parameter in a cycle. It has been demonstrated that
significant performance gains can be achieved by exchanging only the
information about records that changed during a cycle. Our investigations have
led us to implement a low latency and fault tolerant BDII system that involves
only minimal data transfer and facilitates secure transactions in a Grid
environment.Comment: 18 pages; 10 figures; 4 table
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