Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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1. A database management system has an overall availability of 98.94%. How many minutes of downtime can be expected in a typical week (7 days), assuming uniform distribution of failures? Enter the number in minutes, rounded to the nearest whole number.
2. The data warehouse consists of a number of distinct components, including a cloud server (99.999% availability), a database management system server (99.4%), an analytics logic server (94.7%), and, of course, the network infrastructure to the cloud server, which has an availability of 99.9%. What is the overall availability of the system, expressed as a percentage with three digits of precision?
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- 1. What makes the problems in a distributed database system different (or complex) as compared to the problems in a single site system? List at least five differences. 2. Discuss the role of the I) Heterogeneity, ii) Autonomy and iii) Scalability issues in distributed database system architecturearrow_forwardTake, for example, a database that is used by a large airline and in which the underlying database management system utilises snapshot isolation. In spite of the fact that the airline would prefer a serializable execution, it could be ready to tolerate a non serializable execution if it means that the process would be completed more quickly overall.arrow_forwardTake, for example, a database that is used by a large airline and in which the underlying database management system utilises snapshot isolation. Even while the airline would prefer a serializable execution, it could be ready to tolerate a non serializable execution if it implies that the process would be completed more quickly in general.arrow_forward
- Consider all of the potential data request situations that may arise in a distributed database system.arrow_forwardIn a distributed database system, play around with all of the numerous ways users could request data.arrow_forwardAs illustrated, a relational database can't have these connections.arrow_forward
- 2. Design a relational database containing information about automobile parts and their subparts. Be sure to allow for the fact that one part might contain smaller parts and at the same time be contained in still larger parts.arrow_forwardTake, for example, a database utilised by a large airline, where the underlying database management system makes use of snapshot isolation. The airline would prefer a serializable execution, but if a non serializable execution can achieve the same or superior overall performance, it may accept the latter.arrow_forward
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