【摘要】：隨著信息化、數(shù)字化的不斷發(fā)展，產(chǎn)生數(shù)據(jù)的速率呈指數(shù)增長。大量數(shù)據(jù)需要存儲和訪問，給存儲系統(tǒng)帶來了極大的負擔。為了存儲急速增長的數(shù)據(jù)，近年來存儲技術(shù)在快速發(fā)展，存儲設(shè)備的性能也在不斷提高，涌現(xiàn)出了許多新的存儲結(jié)構(gòu)和技術(shù)。這些技術(shù)雖然在一定程度上緩解了存儲的壓力，但與此同時也帶來了存儲成本的大幅度提高，使存儲管理更加復(fù)雜。在這種情況下，分級存儲作為存儲領(lǐng)域的一個重要角色受到了越來越多的關(guān)注。分級存儲思想作為一種能夠有效發(fā)揮存儲設(shè)備性能，提高數(shù)據(jù)訪問率以及降低存儲成本的概念，有著非常廣闊的應(yīng)用前景，成為當前研究的熱點。分級存儲的核心是數(shù)據(jù)遷移技術(shù)，該技術(shù)在不同存儲層次之間遷移數(shù)據(jù)，同時保證遷移過程中數(shù)據(jù)訪問的一致性。 本文對分級存儲系統(tǒng)結(jié)構(gòu)中的數(shù)據(jù)遷移技術(shù)展開研究。具體的研究內(nèi)容如下： 首先，研究了當前主流的網(wǎng)絡(luò)存儲存儲技術(shù)；詳細對比分析了磁盤陣列、固態(tài)盤、虛擬磁帶庫、光盤等存儲設(shè)備當前的性能，為后邊分級存儲平臺的構(gòu)建作一個鋪墊；介紹了分級存儲的的概念、必要性、優(yōu)點、方式和應(yīng)遵循的規(guī)則。 其次，研究了當前的數(shù)據(jù)遷移策略，基于存儲空間的高低水位法和基于數(shù)據(jù)訪問率的Cache替換遷移算法，分析了這些數(shù)據(jù)遷移策略的不足之處；基于信息生命周期管理的思想，提出了MSDV（MigrationStrategyBasedonDataValue）數(shù)據(jù)價值評估模型，該模型與數(shù)據(jù)遷移過程控制策略相結(jié)合可以在盡量減小對系統(tǒng)影響的情況下進一步提高訪問高性能設(shè)備的命中率。 最后，在Disksim模擬器上，對上述遷移算法進行了性能測試，將基于MSDV的數(shù)據(jù)遷移控制策略與Cache替換遷移算法（LRU、LFU、LRU-K和LFU-Aging）進行了對比研究，，驗證了此遷移策略的高效性。
[Abstract]:With the development of informatization and digitalization, the rate of producing data increases exponentially. A large amount of data needs to be stored and accessed, which brings a great burden to the storage system. In order to store the fast-growing data, the storage technology is developing rapidly in recent years, and the performance of the storage devices is improving constantly. Many new storage structures and technologies have emerged. Although these technologies alleviate the pressure of storage to a certain extent, but at the same time, they also bring about a large increase in storage cost, which makes the storage management more complex. In this case, hierarchical storage as an important role in the field of storage has received more and more attention. Hierarchical storage, as a concept that can effectively exert the performance of storage devices, improve the data access rate and reduce the storage cost, has a very broad application prospect, and has become a hot research topic at present. The core of hierarchical storage is data migration, which migrates data between different storage levels and ensures consistency of data access during migration. In this paper, the data migration technology in hierarchical storage system architecture is studied. The specific research contents are as follows: firstly, the current mainstream network storage technology is studied; The current performance of storage devices such as disk array, solid state disk, virtual tape library, optical disk and so on is compared and analyzed in detail, which lays the groundwork for the construction of the rear hierarchical storage platform. This paper introduces the concept, necessity, advantages, ways and rules of hierarchical storage. Secondly, the current data migration strategies, high and low water level method based on storage space and Cache replacement migration algorithm based on data access rate are studied, and the shortcomings of these data migration strategies are analyzed. Based on the idea of information lifecycle management, a MSDV (MigrationStrategyBasedonDataValue) data value assessment model is proposed. The combination of the model and the data migration process control strategy can further improve the hit ratio of accessing high-performance devices with minimal impact on the system. Finally, the performance of the migration algorithm is tested on the Disksim simulator. The data migration control strategy based on MSDV is compared with the Cache replacement migration algorithm (LRU,LFU,LRU-K and LFU-Aging). The efficiency of this migration strategy is verified.
【學(xué)位授予單位】：西安建筑科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TP333

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