Calculate the unavailability of the following system. The load balancer switches cleanly between the presentation server and its backup. The presentation server uses the main database but can fail over to the database backup. The backup presentation server is only configured to use the main database, not its backup. Assume the following unavailabilities. Item Unavailability LoadBalancer 0.9% PresentationServer 0.9% PresentationServerBackup 0.7% Database 1.1% DatabaseBackup 0.6%

Calculate the unavailability of the following system. The load balancer switches cleanly between the presentation server and its backup. The presentation server uses the main database but can fail over to the database backup. The backup presentation server is only configured to use the main database, not its backup. Assume the following unavailabilities. Item Unavailability LoadBalancer 0.9% PresentationServer 0.9% PresentationServerBackup 0.7% Database 1.1% DatabaseBackup 0.6%

Np Ms Office 365/Excel 2016 I Ntermed

1st Edition

ISBN:9781337508841

Author:Carey

Publisher:Carey

Chapter6: Managing Multiple Worksheets And Workbooks

Section: Chapter Questions

Problem 4.7CP

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Scenario and Database Model: InstantRide InstantRide is the new ride sharing application in the city and it has just started its operations. With the help of the InstantRide mobile application, the users request a ride with their location. Drivers and cars are assigned to the request; and then the driver picks up the user to ride their requested location. Information for the users, drivers and cars are stored in the database as well as the travel transactions. In the USERS table, information for the users are stored with their first name, last name and email: In the DRIVERS table, all the drivers in the InstantRide are stored with their name, driving license number and check and rating information: In the CARS table, all the cars in the InstantRide system are kept with the license plate, model and year: Finally, the transactions of the rides are stored in the TRAVELS table. For each travel, start and end time with location are stored. In addition, the involved driver, car and…
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