- Notes, cautions, and warnings
- Additional Resources
- Volumes
- Volume groups overview
- Hosts and host group configurations
- Data mobility for volumes and volume groups
- Thin clones
- Quality of Service (QoS) policies
- Performance policies
The snapshots and thin clones for a volume, volume group, or storage container form a hierarchy. This document uses the following terms to describe this hierarchy:
Term | Definition |
---|---|
Source | A volume, volume group, or snapshot of a volume or volume group that is used as the source for thin clone create and refresh operations. The source can change when the clone is refreshed. |
Base volume, base volume group, base storage container | The founding (production) volume, volume group, or storage container for derivative snapshots and thin clones. |
Family | A volume, volume group, or base storage container and all its derivative thin clones and snapshots. This family includes snapshots and thin clones of the storage resource. |
Parent | The original parent storage container, volume, volume group or thin clone for the snapshot. This resource does not change when a thin clone is refreshed to a different source snapshot, because the new source snapshot must be in the same base volume, volume group, or storage container family. |
For example, suppose the following hierarchy of snapshots and thin clones exists for Volume 1:
The base volume family for Volume 1 includes all the snapshots and thin clones that are shown in the diagram.
For Thin Clone 2:
For Thin Clone 3:
Now, if Thin Clone 3 is refreshed from Snapshot 1:
If Thin Clone 2 is deleted after Thin Clone 3 is refreshed, the original parent resource shows as empty.