Research Of Storage Technology Based On Digital Library

The construction and development of computer technology, internet communication technology and international information superhighway has provided the environment and conditions for the rapid development of library systems and storage technology. However, since a digital library is usually visited concurrently by a large number of users, the I/O bottleneck problem has occurred in data access. Facing increasingly busy application network, rapidly growing of data traffic and continuously increasing storage devices, the server-centric storage architecture using disk array technology is increasingly limited in areas including storage resource sharing, scalability and I/O response speeds with concurrent access. Traditional technologies have been unable to solve such limitations.This paper presents the digital-library multi-client self-regulative cache replacement algorithm (DMSCR) to rise above the limitations and problems facing digital libraries. The algorithm is based on the existing caching technology and combined with the digital library’s feature of multi-client concurrent access. It realizes cross-level repulsive caching and cooperative caching between the same level storage, and automatically adapts to the client load. These advantages enable its bright application prospects. With cache division, the DMSCR algorithm achieves the isolation of client data, and prevents the performance conflict between various clients, and secures the client’s QoS demands.The DMSCR algorithm is tested from the digital-library server-cache hit rate and from the average access time under the tracks of httpd and bd2in accordance with criteria for evaluating cache performance. Testing results show that the algorithm is of outstanding performance and is able to dynamically adapt to changes of the digital library’s multi-client loads, providing high caching performance.