A novel data grid coherence protocol using pipeline-based aggressive copy method

Authors:
Reen-Cheng Wang;Su-Ling Wu;Ruay-Shiung Chang
Affiliations:
Department of Computer Science and Information Engineering, National Dong Hwa University, Hualien, Taiwan, R.O.C.;Department of Computer Science and Information Engineering, National Dong Hwa University, Hualien, Taiwan, R.O.C.;Department of Computer Science and Information Engineering, National Dong Hwa University, Hualien, Taiwan, R.O.C.
Venue:
GPC'07 Proceedings of the 2nd international conference on Advances in grid and pervasive computing
Year:
2007

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Abstract

Grid systems are well-known for its high performance computing or large data storage with inexpensive devices. They can be categorized into two major types: computational grid and data grid. Data grid is used for data intensive applications. In data grids, replication is used to reduce access latency. It can also improve data availability, load balancing and fault tolerance. If there are many replicas, they may have coherence problems while being updated. In this paper, based on the aggressive-copy method, we developed an algorithm using pipeline concept, such that the data transfer tasks can be done simultaneously. This novel Pipeline-based Aggressive Copy method can accelerate the update speed and decrease users' waiting times. We used Globus toolkit for our framework. Compared with the existing schemes and from the preliminary simulation results, our method shows notable improvement in overall completion time.