A Dynamical Maintenance Service for File Replication in Data Grids
碩士 === 東海大學 === 資訊工程與科學系 === 95 === As large amount of data that is produced by scientific experiments and simulations, data grid is a very important and useful technique to solve these kinds of problems. Data replication is a technique that many researchers discuss in past years in data grid. It ca...
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| Format: | Others |
| Language: | en_US |
| Published: |
2007
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| Online Access: | http://ndltd.ncl.edu.tw/handle/07245355838278877865 |
| Summary: | 碩士 === 東海大學 === 資訊工程與科學系 === 95 === As large amount of data that is produced by scientific experiments and simulations, data grid is a very important and useful technique to solve these kinds of problems. Data replication is a technique that many researchers discuss in past years in data grid. It can create many copies of file and stored in the appropriate location to shorten the time of getting the file. In this thesis, we propose a dynamical maintenance service of replication to maintain the data in grid environment. Replicas will be adjusted to the appropriate locations for using. Bandwidth Hierarchy based Replication (BHR) algorithm is a strategy to maintain replica dynamically. We point out a scenario that BHR algorithm will cause a mistake when it operates. That mistake will cause the performance of grid environment become worse. We propose the maintenance strategy called Dynamic Maintenance Service (DMS) which is aimed at overcoming the mistake proposed. The contributions of this thesis are that the data grid environment will be more efficiency by using DMS algorithm. And the experimental results show that the DMS algorithm is more useful and efficient than other replication strategies.
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