The Saving Ratio by Storage System report provides a breakdown of the capacity saved through data reduction functions such as controller-based compression, deduplication, and accelerated compression.
Using this report, you can monitor the amount and ratio of capacity saving in a pool or per storage system.
This report applies to VSP 5000 series, VSP E series, VSP G1x00, VSP Gx00 models, VSP F series, and VSP N series .
The report contains the following metrics:
- Model: The storage system type.
- Serial No: The serial number of the storage system.
- Saving Capacity: The amount of saved logical capacity against the used physical capacity.
- Saving Ratio: The ratio of used logical capacity to used physical capacity.
If any of the data reduction functions are enabled, the pool capacity categories (total capacity, used capacity, and free capacity) displayed in the capacity reports indicate the values after capacity saving. If the pool contains a parity group for which accelerated compression is enabled, then the values before compression are displayed.
To check the capacity of a pool containing an FMC drive, you typically also need to check the physical capacity. However, if the pool is set up to automatically add pool volumes in these storage systems, you only need to check the physical capacity.
The supported storage systems also allow the addition of pool volumes automatically (according to the compression ratio of the parity group) when Autoexpansion is enabled.