COM 330 Chapter 12 Assignment

Description

COM 330 Chapter 12 Assignment

1. The following data structure and constraints exist for a magazine publishing company.
a) The company publishes one regional magazine in each region: Florida (FL), South Carolina (SC), Georgia (GA), and Tennessee (TN).
b) The company has 300,000 customers (subscribers) distributed throughout the four states listed in Part a.
c) On the first of each month, an annual subscription INVOICE is printed and sent to each customer whose subscription is due for renewal. The INVOICE entity contains a REGION attribute to indicate the state (FL, SC, GA, TN) in which the customer resides:

CUSTOMER (CUS_NUM, CUS_NAME, CUS_ADDRESS, CUS_CITY, CUS_ZIP, CUS_SUBSDATE)
INVOICE (INV_NUM, INV_REGION, CUS_NUM, INV_DATE, INV_TOTAL)

The company’s management is aware of the problems associated with centralized management and has decided to decentralize management of the subscriptions into the company’s four regional subsidiaries. Each subscription site will handle its own customer and invoice data. The management at company headquarters, however, will have access to customer and invoice data to generate annual reports and to issue ad hoc queries such as:
• List all customers by region.
• List all new customers by region.
• Report all invoices by customer and by region.

Given those requirements, how must you partition the database?

2. Given the scenario and the requirements in Question 2, answer the following questions:
a. What recommendations will you make regarding the type and charistics of the required database system?
b. What type of data fragmentation is needed for each table?
c. What criteria must be used to partition each database?
d. Design the database fragments. Show an example with node names, location, fragment names, attribute names, and demonstration data.
e. What type of distributed database operation must be supported at each remote site?
f. What type of distributed database operations must be supported at the headquarters site?