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A Dynamic Rebuild Strategy of Multi-Host System Volume on Network Computing Mode

Author: WangYan
Tutor: TanHuaiLiang
School: Hunan University
Course: Computer System Architecture
Keywords: Transparent Computing System volume reconstruction Similarity Second locality Sample hit rate
CLC: TP393.02
Type: Master's thesis
Year: 2009
Downloads: 31
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Abstract

Traditional von Neumann architecture , computational resources and storage resources (including physical storage device and stored in on the system data and user data , etc.) statically bound together , this relatively independent of the state on the one hand a serious impact the calculated synthetic utility of the entity's internal resources to play , the other hand , decentralized management and maintenance of a relatively independent computing entity , a huge workload , and the corresponding software copyright fee needs to be paid to calculate the number of entities . The emergence of network computing mode , to achieve a separation of the calculated and stored , that the system data is no longer stored in the storage resources belonging to a specific calculating subject , but may be all computing resources in the network sharing . Allows multiple hosts to share storage resources in an operating system and other application software , the overall software costs will be greatly reduced, at the same time to facilitate management . Multiple hosts to share the same data there are data consistency , there are many research results , but there must have defects such as power outages , data loss , slow reconstructed . This paper studies how to reconstruct the system volume and private data shared by a reusable system volume by multiple hosts based , related to accelerated start . The specific contents are as follows : (1) to introduce the idea of the ant colony algorithm to analyze the operation of the shared system volume multiple host boot process , and came to the law of the host operating shared system volume . (2) based on the theoretical basis , the host system volume reconstruction similarity model : generally similar to the data block read or write a plurality of hosts during the startup process . This design of a multi-master system volume reconstruction algorithm . Data structure using the combination of bitmap indexes to find data quickly and easily , and space utilization . The algorithm can quickly locate the address stored in the rewrite block and rewritten , maintaining data consistency for each host system volume . ( 3) multi-master system volume reconstruction model based design prefetch order based on sample hit rate and Markov prefetching algorithms double jump . The prefetch algorithm combines the advantages of sequential prefetch Jump prefetch has a higher hit rate , whether real prefetch depends on the sample hit rate , the method further improve the accuracy of the hit .

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