(Answered) Why does a DBMS store data on external storage

Engineering

Answer the following questions about data on external storage in a DBMS:

1. Why does a DBMS store data on external storage?

2. Why are I/O costs important in a DBMS?

3. What is a record id? Given a record's id, how many I/Os are needed to fetch it into main memory?

4. What is the role of the buffer manager in a DBMS? What is the role of the disk space manager? How do these layers interact with the file and access methods layer?

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Computer Engineering, Engineering

Category:- Computer Engineering
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