Quick Check 25.4 – Data 100, Summer 2020
* Required
Distributed file systems need to be fault tolerant because:
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massive files are spread across multiple machines.
files are processed in parallel.
they are often built using cheap commodity hardware.
Assuming independent machine failure with probability p and 3 way replication, what is the probability that a small file consisting of a single block is lost?
*
3*p
p^3
(1-p)^3
1-p^3
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