ODF Sizing Tool

This cluster is not within the regular support limits. You will need a support exception! 
Check the support matrix or 
You requested a compact cluster, but the capacity is not reachable with the set disk size and node resources.
Either reduce the required capacity or increase the disk size or node resources.
The purpose of the ODF Sizing Tool is to help architects design ODF configurations for OCP clusters. Inputs include desired cluster capacity and node building block parameters. Outputs include guidance on how to design your ODF layout to achieve the desired cluster capacity. Relevant Red Hat SKU information is also provided to assist with cost estimation.


Node CPU unit count

Node memory in GB


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  • Standard

    is the regular way to deploy ODF
  • Compact mode

    Will deploy ODF on the supervisors. Useful if there are no OpenShift workers in the cluster
  • Minimal mode

    Will decrease the ODF requirements to a minimum for small deployments
  • Service Disable mode

    Will allow disabling of ODF features to reduce CPU/RAM resource consumption.
    NOTE: This is an undocumented feature in ODF 4.6 that requires support exception approval. It will be documented and supported without support exception in a later ODF release.
  • External mode

    Will leverage an external ODF cluster for OpenShift storage. This external ODF cluster is actually a Red Hat Ceph cluster running on bare metal servers. more details
Note that compact and minimal mode will decrease the possible maximum capacity!