TAILIEUCHUNG - Cơ sở dữ liệu hình ảnh P6

Rapid advances in computing and communication technologies coupled with the dramatic growth of the Internet have led to the emergence of a wide variety of multimedia applications, such as distance education, on-line virtual worlds, immersive telepresence, and scientific visualization. These applications differ from conventional distributed applications in at least two ways. | Image Databases Search and Retrieval of Digital Imagery Edited by Vittorio Castelli Lawrence D. Bergman Copyright 2002 John Wiley Sons Inc. ISBNs 0-471-32116-8 Hardback 0-471-22463-4 Electronic 6 Storage Architectures for Digital Imagery HARRICK M. VIN University of Texas at Austin Austin Texas PRASHANT SHENOY University of Massachusetts Amherst Massachusetts Rapid advances in computing and communication technologies coupled with the dramatic growth of the Internet have led to the emergence of a wide variety of multimedia applications such as distance education on-line virtual worlds immersive telepresence and scientific visualization. These applications differ from conventional distributed applications in at least two ways. First they involve storage transmission and processing of heterogeneous data types such as text imagery audio and video that differ significantly in their characteristics . size data rate real-time requirements and so on . Second unlike conventional best-effort applications these applications impose diverse performance requirements for instance with respect to timeliness on the networks and operating systems. Unfortunately existing networks and operating systems do not differentiate between data types offering a single class of best-effort service to all applications. Hence to support emerging multimedia applications existing networks and operating systems need to be extended along several dimensions. In this chapter issues involved in designing storage servers that can support such a diversity of applications and data types are discussed. First the specific issues that arise in designing a storage server for digital imagery are described and then the architectural choices for designing storage servers that efficiently manage the storage and retrieval of multiple data types are discussed. Note that as it is difficult if not impossible to foresee requirements imposed by future applications and data types a storage server that supports .

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