This preview shows page 1. Sign up to view the full content.
Unformatted text preview: are not affected. Location transparency Medium Yes No A user is aware of the data fragmentation. However, he/she doesnt 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 Its 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....
View Full Document
- Spring '09