cinder/releasenotes/notes/ibmsvciogrpselection-e60773...

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---
features:
- |
In IBM Storwize_SVC driver, user could specify only one IO
group per backend definition. The user now may specify a comma separated
list of IO groups, and at the time of creating the volume, the driver will
select an IO group which has the least number of volumes associated with
it. The change is backward compatible, meaning single value is still
supported.