Storage Efficiency Reporting
The array GUI interface provides storage efficiency metrics in several places, to
assist in monitoring and managing the capacity of HPE storage arrays. For volumes, this
information includes the following:
- The assigned size of a volume
- The mapped size of a volume (the unreduced, or logical usage)
- The compression ratio of the data in the volume
- Aggregate space savings, including data reduction savings and thin provisioning savings
- Data reduction savings, including zero-block, compression, deduplication, and clone savings)
NOTE: Clone and compression
savings ratios are based on all volumes. Deduplication savings ratio is based on
volumes that participate in deduplication.
You can see the reported metrics in
the following places:- Monitor Capacity Home Page — shows the total data reduction ratio (total logical usage / total physical usage) for all pools in the group, as applicable. The total data reduction ratio includes savings from zero-blocks, clone-sharing, compression and deduplication. It also shows the overall savings that includes data reduction savings and thin provisioning savings (total size/total logical usage).
- with All pools and All volumes selected — shows savings reports on the total savings ratio for the pool/group, and the total bytes saved. Also shows the total physical space in use, the unused physical space reserved to thickly provisioned volumes, and the free space.
- with one pool and All volumes selected — shows the total physical usage, unused reserve, and total size of the pool. Shows the total logical usage, unused reserve, and total size of the pool.
- with one volume selected — shows size, usage, unused reserve, and overall compression ratio for the volume, and indicates whether deduplication is enabled or disabled.
- with one folder and All volumes selected — shows size, usage, unused reserve, and overall compression ratio for the volume.
- Volume Summary — shows size, usage, unused reserve, and overall compression ratio for the volume, and indicates whether deduplication is enabled or disabled. Also shows volume and snapshot usage as logical space.