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DISTRIBUTED DATABASE CONCEPTS Compare the primary site method with the primary copy method for distributed concurrency control. How does the use of backup sites

DISTRIBUTED DATABASE CONCEPTS  

Compare the primary site method with the primary copy method for distributed concurrency control. How does the use of backup sites affect each?

When are voting and elections used in distributed databases?

Discuss briefly online directories, their management, and their role in distributed databases

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Discuss the data modeling concepts in DynamicDB.

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