Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Consider "snapshot isolation" as an example of an airline
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- Two students are enrolling in the same course, but there is only one open seat. Is it feasible to allocate both students the last vacant seat in a database system?arrow_forwardAnother action may be triggered by the execution of a trigger. There is often a limit on how deep nesting may go in database systems. Why could they impose such a restriction?arrow_forwardGive each of the following methods for storing a relational database two advantages, two disadvantages, and a summary of how they affect the database as a whole. A separate file should be kept for each relationship.arrow_forward
- Consider the term "snapshot isolation" as an example for a database used by an airline. Is the selection of a strategy that does not lend itself to serialization suitable in the event that airlines are able to improve their overall performance?arrow_forwardConsider, for instance, the database used by a large airline that relies on snapshot isolation as the foundation for its data management. In order for an airline to be willing to accept a nonserializable execution in exchange for improved overall performance, what kinds of conditions would have to be met first?arrow_forwardAs an example, consider "snapshot isolation" in the context of a database for an airline. If airlines can improve their overall performance, is a non-serializable strategy acceptable?arrow_forward
- Consider the following scenario: there is only room for one student in the class that two students are trying to enroll in. What aspect of the database system makes it impossible for both students to claim the last open seat?arrow_forwardOne way to enhance this example is to use an airline's database that makes use of "snapshot isolation." What if a non-serializable execution decreased the airline's overall performance?arrow_forwardIn a database for an airline, consider "snapshot isolation." The question is if a strategy that doesn't allow for serialization is appropriate for airlines that are able to improve their overall profitability.arrow_forward
- A database used by airlines that uses a technique called "snapshot isolation" might serve as an excellent case in point here. Consider the possibility that the airline achieves better results overall with a non-serializable execution.arrow_forwardFor the purpose of this illustration, let's consider a database for an airline that employs "snapshot isolation." There is a possibility that Airline will agree to a non-serializable execution if doing so would result in improved overall performance.arrow_forwardImagine for a minute that a financial institution's database is being safeguarded by the snapshot isolation database technique.Do you offer a concrete example of how a nonserializable execution may be detrimental to a bank? If so, please distribute it.arrow_forward
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