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Research Of Replica Management In Data Grid

Posted on:2012-06-26Degree:MasterType:Thesis
Country:ChinaCandidate:X Y ShiFull Text:PDF
GTID:2218330338463036Subject:Computer software and theory
Abstract/Summary:PDF Full Text Request
The information explosion has brought about an unprecedented demand in the speed of data storing and accessing. The storage scale is growing soaring larger, and management is becoming increasingly complex as well, all of these have caused greater challenges to the storage scalability and reliability. To solve all these difficulties, the data grid technology comes into being at this time. The data grid is a major resource based data-grid system that organizes the huge, decentralized, independent, heterogeneous storage system from the internet into a reliable, secure integration of logical meaning, and manages them unified, aiming at providing the users with transparent, efficient, highly reliable service.The replica technology of data grid is essential, such as: replica creation, replica selection, replica location, replica consistency maintenance. Firstly, among them, the quality of replica creation will directly affect the system performance of information grid, so a good foundation must be laid according to the characteristics of environment to create replica at the appropriate nodes. After the replica creation, it's necessary to use the technology of replica selection and replica location to find the best replica. At the same time, replica consistency maintenance is also a copy of an important part of the replica management, which will directly impact on the performance and correctness of replica management.This thesis researches several aspects on key technologies of replica in the data grid: at first, we advance the traditional algorithm and propose the advanced best replica algorithm; secondly, accordingly to the environment, we propose suitable methods of replica location and replica consistency maintenance and raise the technology of replica selection based on replica cost. At last, we finish the replica management system.
Keywords/Search Tags:Data Grid, Replica Creation, Replica Selection, Replica Location, Replica Consistency Maintenance
PDF Full Text Request
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