Unformatted text preview: are not affected. Location transparency Medium Yes No A user is aware of the data fragmentation. However, he/she doesn’t need to know the location of the data to be accessed. The system forwards the data access requests to the appropriate sites. Local mapping transparency Low Yes Yes It’s the lowest transparency level. A user had to specify fragment name and location of the data to be accessed. No transparency None Yes Yes User is aware of fragments, locations and replications. A query would need to be modified as the data distribution changes....
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This note was uploaded on 12/23/2009 for the course DBST 663 taught by Professor Tba during the Spring '09 term at MD University College.
- Spring '09