SUSE Support

Here When You Need Us

Adjusting existing Erasure Code profiles due to CRUSHMAP changes.

This document (000019609) is provided subject to the disclaimer at the end of this document.


SUSE Enterprise Storage 5.x
SUSE Enterprise Storage 6


The crushmap was modified and the failure domains or crush-root entries of existing Erasure Code (EC) profiles now point to renamed or removed non existing crushmap entries.


The failure domain or crush-root for an existing EC profile can be adjusted using the following example command:
ceph osd erasure-code-profile set <profile-name> <parameter>=<value> --force


ceph osd erasure-code-profile set default crush-device-class=<enter_existing_value> crush-failure-domain=<enter_existing_value> crush-root=datacenter k=<enter_existing_value> m=<enter_existing_value> --force

IMPORTANT: See the Additional Information section since not all parameters are supported to be changed. When changing any one of the <crush-*> parameters, the other existing parameters listed above need to be specified with their current values, including the existing k= and m= values.



CRUSHMAP entries were renamed or removed.

Additional Information

In most cases this will be relevant when a CRUSHMAP was previously using separate crush root hierarchies to distinguish between spinning (HDD) and solid state (SSD) devices. This was done since there was no OSD device class crush property yet with earlier Ceph versions.

In such a case, updating to a Ceph version that does support device classes, the crushmap can be updated to use the OSD device class instead. Any existing EC profiles however will for example still point to the now non existent crush-root's, hence requiring an update.

Note that 'crush-*' parameters in profiles are used only at the moment of rule creation and will not update / have any effect on already existing rules that were created previously using a specific profile.

NOTE: Other values, like the k/m values, are however still relevant for existing Pools that were created using an existing profile and therefor can and should not be changed. Modifying the EC plugin or K/M values of an existing profile is therefor NOT allowed or supported. It is recommended to instead create a new profile when creating a new pool that requires different K/M and plugin values.


This Support Knowledgebase provides a valuable tool for SUSE customers and parties interested in our products and solutions to acquire information, ideas and learn from one another. Materials are provided for informational, personal or non-commercial use within your organization and are presented "AS IS" WITHOUT WARRANTY OF ANY KIND.

  • Document ID:000019609
  • Creation Date: 23-Oct-2020
  • Modified Date:23-Oct-2020
    • SUSE Enterprise Storage

< Back to Support Search

For questions or concerns with the SUSE Knowledgebase please contact: tidfeedback[at]

SUSE Support Forums

Get your questions answered by experienced Sys Ops or interact with other SUSE community experts.

Support Resources

Learn how to get the most from the technical support you receive with your SUSE Subscription, Premium Support, Academic Program, or Partner Program.

Open an Incident

Open an incident with SUSE Technical Support, manage your subscriptions, download patches, or manage user access.