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Que. An experimental file server is up 75% of the time and down for 25% of the time due to bugs. How many times does this file server have to be replicated to give an availability of at least 99% ?
a. 2
b. 4
c. 8
d. 16
Answer:4
Aasif :(November 27, 2019) with K being the number of servers,we have (1/4)^k<0.01,expressing the worst situation,when all the servers are down,should happen at most(1/100) of the time.
this gives us K=4
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