How to determine space usage in an aggregate
You can view space usage by all volumes in one or more aggregates with the aggregate show-space command. This helps you see which volumes are consuming the most space in their containing aggregates so that you can take actions to free more space.
The used space in an aggregate is directly affected by the space used in the FlexVol volumes it contains. Measures that you take to increase space in a volume also affect space in the aggregate.
- Volume Footprints
The total of all volume footprints within the aggregate. It includes all of the space that is used or reserved by all data and metadata of all volumes in the containing aggregate.
- Aggregate Metadata
The total file system metadata required by the aggregate, such as allocation bitmaps and inode files.
- Snapshot Reserve
The amount of space reserved for aggregate Snapshot copies, based on volume size. It is considered used space and is not available to volume or aggregate data or metadata.
- Snapshot Reserve Unusable
The amount of space originally allocated for aggregate Snapshot reserve that is unavailable for aggregate Snapshot copies because it is being used by volumes associated with the aggregate. Can occur only for aggregates with a non-zero aggregate Snapshot reserve.
- Total Used
The sum of all space used or reserved in the aggregate by volumes, metadata, or Snapshot copies.
- Total Physical Used
The amount of space being used for data now (rather than being reserved for future use). Includes space used by aggregate Snapshot copies.
The following example shows the aggregate show-space command output for an aggregate whose Snapshot reserve is 5%. If the Snapshot reserve was 0, the row would not be displayed.
cluster1::> storage aggregate show-space
Aggregate : wqa_gx106_aggr1
Feature Used Used%
-------------------------------- ---------- ------
Volume Footprints 101.0MB 0%
Aggregate Metadata 300KB 0%
Snapshot Reserve 5.98GB 5%
Total Used 6.07GB 5%
Total Physical Used 34.82KB 0%