March 2022
Intermediate to advanced
682 pages
22h 58m
English
Content preview from Databases Illuminated, 4th Edition
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12.1 Rationale for Distribution
A distributed database system (DDBS) is one in which multiple database sites are linked by a communications system in such a way that the data at any site is available to users at other sites. Normally, each site or node has a complete information processing system, with its own data administration function, personnel, users, hardware, and software—including a local database, database management system, and communications software. At the very least, a site must have memory and a communications processor. The sites are usually geographically remote and are linked by a telecommunications system, although it is possible to have a distributed system linked by a local area network within a single building or small ...
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