本文選題：網(wǎng)格 + 數(shù)據(jù)網(wǎng)格�。� 參考：《燕山大學(xué)》2014年碩士論文

【摘要】：網(wǎng)格是一種新興的技術(shù)，它將眾多的信息和資源的孤島連接了起來(lái)，人們通過(guò)網(wǎng)格使工作、生活等更加的便利。網(wǎng)格中的計(jì)算網(wǎng)格是一個(gè)計(jì)算密集型應(yīng)用平臺(tái)，而數(shù)據(jù)網(wǎng)格是由計(jì)算網(wǎng)格衍生而來(lái)，它是一個(gè)分布式異構(gòu)的數(shù)據(jù)密集型和計(jì)算密集型的平臺(tái)，但又與計(jì)算網(wǎng)格沒(méi)有嚴(yán)格的分界線。數(shù)據(jù)網(wǎng)格是一個(gè)主要以數(shù)據(jù)為主要資源的網(wǎng)格平臺(tái)，數(shù)據(jù)網(wǎng)格中的核心技術(shù)即副本管理策略，有效的副本管理策略可以減少網(wǎng)絡(luò)的傳輸時(shí)延、網(wǎng)絡(luò)帶寬的消耗等。 首先對(duì)當(dāng)前的副本管理策略現(xiàn)狀進(jìn)行了分析，針對(duì)當(dāng)前數(shù)據(jù)副本管理策略的效率不高、性能不佳等特征，對(duì)副本放置、副本替換以及副本創(chuàng)建中的副本放置三方面進(jìn)行了分析和研究。合理地利用網(wǎng)格的環(huán)境并作出有效的副本創(chuàng)建可以提高數(shù)據(jù)網(wǎng)格系統(tǒng)的性能，通過(guò)副本的定位和選擇可以找到最佳的副本，副本替換策略是副本管理技術(shù)的核心，因?yàn)槊總�(gè)節(jié)點(diǎn)的存儲(chǔ)單元的空間都是有限的，一個(gè)好的副本替換策略可以提高作業(yè)的執(zhí)行速度、存儲(chǔ)單元的利用率以及減少帶寬的消耗。而副本的一致性則有效的解決了兩個(gè)及以上的副本一致性問(wèn)題。 其次，對(duì)DHRA副本管理策略的副本選擇算法、副本創(chuàng)建算法進(jìn)行了研究，總結(jié)了它們的缺點(diǎn)，考慮了其它的因素提出了改進(jìn)的副本選擇算法以及改進(jìn)的副本創(chuàng)建算法。 再次，對(duì)DHRA副本管理策略的副本替換算法進(jìn)行了研究，論證了在副本刪除時(shí)只考慮副本歷史訪問(wèn)時(shí)間的不足。提出了基于副本權(quán)重和副本代價(jià)的改進(jìn)的副本替換算法。將這些算法進(jìn)行了整合提出了新的副本管理策略，并用java語(yǔ)言實(shí)現(xiàn)了該策略。 最后，，采用了Optorsim數(shù)據(jù)網(wǎng)格模擬工具對(duì)LWLC數(shù)據(jù)副本管理算法進(jìn)行了仿真模擬實(shí)驗(yàn)，也對(duì)DHRA副本管理策略、LRU副本管理策略、LFU副本管理策略進(jìn)行了仿真模擬實(shí)驗(yàn)。并對(duì)實(shí)驗(yàn)結(jié)果進(jìn)行了對(duì)比分析，分析結(jié)果驗(yàn)證了LWLC數(shù)據(jù)副本管理策略的有效性。
[Abstract]:Grid is a new technology. It connects many isolated islands of information and resources. People use grid to make work and life more convenient. The computational grid in the grid is a computational intensive application platform, and the data grid is derived from the computing grid. It is a distributed heterogeneous data-intensive and computation-intensive platform. However, there is no strict boundary with the computational grid. Data grid is a grid platform with data as the main resource. The core technology of data grid is replica management strategy. Effective replica management strategy can reduce the transmission delay and bandwidth consumption of the network. Firstly, the current status of replica management strategy is analyzed, aiming at the low efficiency and poor performance of the current data replica management strategy, the replica is placed. Replica replacement and replica placement in replica creation are analyzed and studied. Making reasonable use of grid environment and making effective replica creation can improve the performance of data grid system, and the best replica can be found by locating and selecting replicas. The replica replacement strategy is the core of replica management technology. Because the storage cell space of each node is limited, a good replica replacement strategy can improve the job execution speed, memory cell utilization and reduce bandwidth consumption. The consistency of replica effectively solves the problem of two or more replica consistency. Secondly, this paper studies the replica selection algorithm and replica creation algorithm of DHRA replica management strategy, summarizes their shortcomings, and proposes an improved replica selection algorithm and an improved replica creation algorithm considering other factors. Thirdly, the replica replacement algorithm of DHRA replica management strategy is studied, and the deficiency of replica history access time is demonstrated when the replica is deleted. An improved replica replacement algorithm based on replica weight and replica cost is proposed. A new replica management strategy is proposed by integrating these algorithms and implemented in java language. Finally, the Optorsim data grid simulation tool is used to simulate the LWLC replica management algorithm, and the DHRA replica management strategy is also simulated. The experimental results show that the LWLC replica management strategy is effective.
【學(xué)位授予單位】：燕山大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TP393.02

【參考文獻(xiàn)】

相關(guān)期刊論文 前3條

1 王t

本文編號(hào)：1945011