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Alex
3 years ago
15

In a server farm such as that used by Amazon or eBay, a single failure does not cause the entire system to crash. Instead, it wi

ll reduce the number of requests that can be satisfied at any one time. If a company has 10,000 computers, each with a MTTF of 35 days, and it experiences catastrophic failure only if 1/3 of the computers fail, what is the MTTF for the system? (Assume that computers are not repaired.)
Computers and Technology
1 answer:
Jet001 [13]3 years ago
8 0

Answer:12 days

Explanation:

Mean time to failure is given by

MTTF=\frac{Total working hours of running}{Total no. of units}

Let's say N is the average amount  of time system runs until \frac{1}{3} computer fail

MTTF of each computer =35

35=\frac{n\cdot 10,000}{10,000\cdot \frac{1}{3}}

35=N\cdot 3

N=\frac{35}{3}=11.667\approx 12days

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