New Durability Calculator
Durability: The probability of data not being lost in a storage system. This is generally expressed in “nines”, where 99.99% or “four nines” durability means on an annual basis, the system can expect to lose 0.01% of the data. Things that affect storage system durability are data protection, like RAID, replications, and erasure coding. To calculate durability, you need to know the failure rate of the domain and the blast radius (how many devices fail when a larger component fails), the system rebuild time, and the number of data shards and parity shards in the system.
jmhandsThis was one of the first projects I did with vercel v0 and really stoked on how it turned out. Source code available. Like before based on the Backblaze durability python script for the math.