a database with an availibility of 93.4% is accessed via a network with an availibility of 99.2% on average for how much time in a week would a user be unable to retrive data from the database? i calculated around 12 hrs.is it right?
To calculate the amount of time a user would be unable to retrieve data from the database, we can multiply the availabilities of the database and the network together.
The availability of the database is given as 93.4% or 0.934, and the availability of the network is given as 99.2% or 0.992.
We can calculate the unavailability or downtime as (1 - availability). So the unavailability of the database is 1 - 0.934 = 0.066, and the unavailability of the network is 1 - 0.992 = 0.008.
To find the total downtime, we multiply the unavailability of the database by the unavailability of the network and then multiply by the total time period in a week.
Total downtime = (unavailability of database * unavailability of network) * time period
Time period in a week = 7 days * 24 hours = 168 hours
Total downtime = (0.066 * 0.008) * 168 = 0.088704 or approximately 0.089 hours
Therefore, a user would be unable to retrieve data from the database for approximately 0.089 hours or around 5.34 minutes in a week. This is significantly less than the calculated 12 hours. Please check your calculations again.