cinder/releasenotes/notes/unity-fast-clone-02ae88ba8fdef145.yaml
Peter Wang a6c22238e1 Unity: Use thin clone when cloning volume
Unity storage now supports cloning volume by taking its snapshot,
it's more efficient than previous implementation.

However, there is limitation on the count of thin clones inside one LUN
family sharing the same base LUN. Every time the limitation reaches, a
new volume will be cloned using `dd` copy. Then thin clone will be taken
from the new dd-copied volume.

DocImpact
Implements: blueprint unity-fast-clone

Change-Id: I5e4264ce9917e831e3efe27dc332641c9f94c07f
2017-06-28 13:16:22 +08:00

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YAML

---
features:
- Add thin clone support in the Unity driver. Unity storage supports the thin
clone of a LUN from OE version 4.2.0. It is more efficient than the dd
solution. However, there is a limit of thin clone inside
each LUN family. Every time the limit reaches, a new LUN family will be
created by a dd-copy, and then the volume clone afterward will use the
thin clone of the new LUN family.