We have a grid of 20 computers where each data is written to at least two computers. A failure or loss of data would occur when two servers fail at the same time. If each computer has an MTBF of 45k hours how do I across calculating the system MTBF where a system failure only occurs when 2 or more nodes fail at the same time?
We can assume 0 time to repair, because within less than a minute the backup data becomes primary and the primary creates a backup across the remaining members of the grid.
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