Text D: Selecting Database Management System

Selecting the best database management system begins by analyzing database needs and characteristics. The information needs of the organization affect what type of data is collected and what type of database management system is used. Important characteristics of databases include the size of the database, number of concurrent users, performance, the ability of the DBMS to integrate with other systems, the features of the DBMS, vendor considerations, and the cost of the database management system.

The database size depends on the number of records or files in the database. The size determines the overall storage requirement for the database. Most database management systems can handle relatively small databases of less than 100 million bytes; fewer can manage terabyte-size databases.

The number of simultaneous users that can access the contents of the database is also an important factor. Clearly, a database that is meant to be used in a large workgroup must be able to support a number of concurrent users; if it cannot, then the efficiency of the members of the workgroup will be lowered. The term scalability is sometimes used to describe how well a database performs as the size of the database or the number of concurrent users is increased. A highly scalable database management system is desirable to provide flexibility. Unfortunately, many companies make a poor DBMS choice in this regard and then later are forced to convert to a new DBMS when the original does not meet expectations.

Agree or disagree with the following statements.

1. Selecting the best database management system begins by analyzing database needs and characteristics.

2. The database size doesn’t depend on the number of records or files in the database.

3. The number of simultaneous users that can access the contents of the database is also an unimportant factor.

4. Most database management systems can handle relatively large databases of more than 100 million bytes.

5. A highly scalable database management system is desirable to provide flexibility.

Find the words with opposite meaning in the text.

a) rigidity; b) unwanted; c) exclude; d) to reduce; e) minor, unimportant; f) disintegrate; g) seller

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