Feature pages are design documents that developers have created while collaborating on oVirt.

Most of them are outdated, but provide historical design context.

They are not user documentation and should not be treated as such.

Documentation is available here.

Reduce LUNs from a Storage Domain


Adding ability to reduce LUNs from a Block Storage Domain.


  • Name: Liron Aravot

Detailed Description

The purpose of this feature is to provide a way to reduce LUNs from an oVirt Storage Domain. Currently oVirt supports extension of a block Storage Domain, but one may want to reduce from a storage domains because of various reasons, for example - unused storage domain space and need to extend a different storage domain. oVirt will allow to move the data off the selected devices to other devices of the domain and eventually will free the selected device(s). Note that the Storage Domain must be in Maintenance state.

Benefit to oVirt

Ability to reduce devices from block storage domains.

User Experience

  1. Refactor the Edit Storage Domain dialog to include option to reduce devices.
  2. Add REST-API support

User work-flows


In order to reduce luns the user will submit a POST request to /ovirt-engine/api/storagedomains/{storagedomain:id}/reduceluns with the luns it wishes to reduce from the storage domain. For example:

<logical_unit id="1IET_00010001"/>
<logical_unit id="1IET_00010002"/>


The user will be able to choose the LUNs it wishes to reduce from the Storage Domain in the Edit Storage Domain dialog.

Documentation / External references

This feature is using the following LVM commands: