Erasure Coding Calculator

This calculator will help you to determine your raw and usable capacity and io across a range of erasure coding settings.

Erasure Code Profile Name

Number of Datacenters

Number of Racks per Datacenter

Number of Servers per Rack

Number of OSD Drives per Server

Drive Capacity

TiB

Drive IOPS

Data Chunks (K)

Erasure Code Parity (M)

Erasure Code Stripe Unit

Bytes

Everage Object/File Size

Usable Capacity

128 TiB

Raw Capacity

192 TiB

Storage Efficiency

66.41 %

Read/Write IOPS

read: 2400; write: 1600

Raw IOPS

9600

Read/Write IOPS Efficiency %

read: 25.00 %; write: 16.67 %

Erasure Code Stripe Width

16384

Failure Domain

host

Command To Create EC Profile

Copy

ceph osd erasure-code-profile set erasure k=4 m=2 crush-failure-domain=host