Erasure Code Calculator

Estimate raw and usable capacity along with failure tolerance for RustFS erasure coding.

Configuration

Number of serversDrives per serverDrive capacity (TiB)Stripe size (K + M)

Stripe size is the number of drives in each erasure set (data + parity). Larger stripes improve efficiency when capacity allows.

Parity (M)

Parity controls resiliency. Higher M increases fault tolerance but reduces usable capacity.

Recommended configuration

Stripe size 16, parity 4. Balanced for efficiency and availability.

Usable capacity0 TiB

Raw capacity0 TiB

Storage efficiency0%

Drive failure tolerance

0 drives across cluster

(0 out of 0 drives per stripe)

Server failure tolerance

0 servers across cluster

(0 out of 8 servers per shard)

Calculation uses parity and stripe sizing to estimate capacity and tolerances. Results are rounded down to match quorum-safe limits.