Storage · Estimate
You store 1 PB of data with 10 + 4 erasure coding (each 10 data pieces get 4 parity pieces). How much raw disk do you need, before headroom?
medium Estimation
Answer
About 1.4 PB raw. In review, anything from 1.17 to 1.68 counts as right.
The worked estimate
Each 10 units of data take 14 units of disk: 1 PB × 14 ÷ 10 = 1.4 PB. Three-way replication of the same data would take 3 PB.
Numbers: Numbers to know.
Review this in your daily deck → All cards in Storage