虚拟光盘库系统技术研究与实现

发布时间：2018-03-08 00:03

本文选题：光盘库　切入点：通信接口　出处：《南京航空航天大学》2013年硕士论文　论文类型：学位论文

【摘要】：随着信息技术的快速发展，带动了数据存储的爆炸式增长，因此磁盘阵列、磁带库和光盘库等大容量存储设备得到了广泛的应用。作为二级存储设备的光盘库有着容量大、使用寿命长和安全性高等特点，但是其存取速度慢和搜索性能差等缺点已经越来越无法满足用户的要求。如何提高光盘库的存取速度已经成为影响整个光盘库系统存储性能的关键。为此本文研究了一种虚拟光盘库存储系统，为有效提高光盘库的存取能力提供一种新的思路和方法。通过对光盘库的存储原理和功能模块的分析，本文构建了基于虚拟光盘库的存储体系。其主要包括：SCSI接口传输、MYSQL数据库、检索查询、磁盘-光盘库缓存替换算法和存储资源管理。在对Socket通信接口和SCSI传输接口的原理分析基础上，设计了不同类型的接口，并分别实现了在客户端和服务端、服务端和光盘库之间的数据通信和传输。采用了MYSQL数据库作为检索查询的工具，，根据文件信息的查询特点设计了检索对象，并以此作为创建相关数据库表的依据，此外本文在多种结构数据库表的性能分析和实验基础上，创建了具有多表结构和索引功能的数据库表。同时MYSQL数据库满足了检索查询、任务调度和数据信息存储等功能的要求。建立了虚拟光盘库系统的缓存模型，通过对传统模型的研究和分析，提出了一种适合该系统的改进后的缓存算法。通过与相关模型的性能对比以及对该模型参数的深入分析和测试实验，确定了该模型算法的最优参数。搭建了一个资源存储的管理平台，它集成了存储管理、缓存管理、光盘库管理和数据库管理等模块，实现了一个虚拟化的存储环境。最后通过对整个虚拟光盘库系统功能和传输性能的实际测试，验证了该系统的可行性和有效性。
[Abstract]:With the rapid development of information technology, the explosive growth of data storage has been driven, so the disk array, magnetic tape library and optical disk library and other large-capacity storage devices have been widely used. Long service life and high safety, However, its shortcomings such as slow access speed and poor search performance have become increasingly unable to meet the requirements of users. How to improve the access speed of optical disk library has become the key to affect the storage performance of the whole optical disk library system. A virtual optical disk storage system is studied. It provides a new way of thinking and method to improve the access ability of optical disk library. Based on the analysis of storage principle and function module of optical disk library, a storage system based on virtual optical disk library is constructed in this paper. Disk-disk library cache replacement algorithm and storage resource management. Based on the analysis of the principle of Socket communication interface and SCSI transport interface, different kinds of interfaces are designed, and the data communication and transmission between client and server, server and CD library are realized respectively. The MYSQL database is used as the tool to search and query. According to the query characteristics of the file information, the retrieval object is designed and used as the basis for the establishment of the related database tables. In addition, on the basis of performance analysis and experiment of multi-structure database tables, a database table with multi-table structure and index function is created in this paper. At the same time, MYSQL database meets the requirements of retrieval query, task scheduling and data information storage. The cache model of virtual optical disk library system is established, and the traditional model is studied and analyzed. An improved buffer algorithm suitable for the system is proposed and the optimal parameters of the model algorithm are determined by comparing the performance with the related model and analyzing the parameters of the model and testing experiments. A resource storage management platform is built, which integrates storage management, cache management, optical disk library management and database management, and implements a virtual storage environment. Finally, the feasibility and effectiveness of the system are verified by testing the function and transmission performance of the whole virtual optical disk library system.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TP333

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