By Gio Wiederhold
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This quantity supplies an outline of the state of the art with appreciate to the improvement of all kinds of parallel pcs and their program to a variety of troublesome areas. The foreign convention on parallel computing ParCo97 (Parallel Computing ninety seven) was once held in Bonn, Germany from 19 to 22 September 1997.
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We note that information systems based on data in text form, often used for automated library support, tend not to use structured data but depend greatly on searches for keywords in titles, abstracts, and author lists. This book deals mainly with structured data, so that it is less relevant to applications that are based on content analysis. The management of inventories in manufacturing, particularly where products consist of many parts and subassemblies, has been one of the earliest and most productive areas of database systems.
Increased storage capacity can be achieved by increasing the size of the units, but this adds mechanical delays to the storage systems. In order to increase datastorage capabilities without also increasing bulk, the space required to store each single bit of data has to be reduced. Optical Technology The use of light rather than magnetism to store data has the advantage that the required area per bit is much smaller than the area per bit required for magnetic recording. The availability of the technology from the entertainment industry is spurring the development of optical disc storage.
2-1 Hardware Choices 27 in this book, due to the parameterization. New or improved storage devices are continually being developed, and any description reﬂects the state at the time of writing. The reduction of hardware descriptions to the small set of parameters makes it possible to use the analysis and design procedures in the remainder of the book also for devices which are not described or even not yet invented. Typical values of parameters for the types of hardware discussed are given in Table 2-1.
Database design by Gio Wiederhold