James OLTPOLAP - Chapter 9 describes several different DB...

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Chapter 9 describes several different DB Management Approaches, including Distributed Databases, Client/Server Systems, Web Access, Data Warehouses and Object-Oriented DBMSs. Distributed Databases are databases which are single databases on computers on multiple computers at different sites connected to one another by a network. In order for these databases to work correctly a distributed database management system needs to be purchased. There are two types of DDBMS, homogeneous in which the DBMSs are the same at all locations and heterogeneous where two or more sites are different. DDBMSs have several characteristics, location transparency, replication transparency and fragmentation transparencies. Location transparency refers to the ability of users to access data at remote sites as easily as their location. Replication transparency refers to the ability update their local copies and then share them with the other sites. This can sometimes cause problems and inconsistencies. Sometimes the replications need to be done over multiple sites and this can slow
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This note was uploaded on 07/31/2011 for the course CS 221 taught by Professor Shannon during the Summer '11 term at American Public University.

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James OLTPOLAP - Chapter 9 describes several different DB...

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