Friday, May 1, 2020

Distributed Database Question Bank with Answers 10


How is autonomy handled by distributed, parallel, and federated databases? 


In distributed databases the nodes are all handled by the same DDBMS so there is no autonomy for the participating database parts. The local DBA of a database part has some autonomy on the data that are managed locally. All operations at a given site are controlled by that site; no site X should depend on some other site Y for its successful functioning. Local operations are purely local to that site.
In parallel databases the PDBMS has full control and there is no autonomy at all for the participating parts.
In federated databases each database participating in the federation is its own separate database with its own DBMS and has full autonomy.


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