How is the fault tolerance measured?

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Asked 5 years, 7 months ago

Modified 5 years, 7 months ago

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“If the number of nodes that agree exceeds 2/3, the blocks or transactions of clients will be accepted”

Practical Byzantine fault tolerance (pBFT) : (n - 1) / 3

I read those 2 things in a PDF that a friend of mine sent me.

The question is: are those numbers (2/3) or “(n-1)/3” constant? Or those numbers are established by the developers.

What makes those numbers? What’s the reason for 2/3 and not 2.5/3 ? Or why not (n - 2 ) / 3

asked Feb 15, 2019 at 19:23

Juan

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Possible duplicate of Byzantine fault-tolerant consensus - Why 33% threshold
– 404 User not found
Commented Feb 15, 2019 at 19:48
It talks about why those numbers but not how they are measured
– Juan
Commented Feb 15, 2019 at 20:02
Where are you getting those nonsense numbers from? Those don't reflect anything about how the network operates at all.
– Claris
Commented Feb 15, 2019 at 22:55
They are not nonsense. They are written on the Practical Byzantine fault PDF. It does reflect how the network operates (Not for Bitcoin’s blockchain though)
– Juan
Commented Feb 15, 2019 at 23:20

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