Query: What can I use to estimate the size reduction of my storage environment ?
Source: sg247938.pdf
Relevant passages:
IBM Comprestimator is an integrated GUI and CLI host-based utility that estimates the space savings 
Run the Comprestimator utility before implementing an IBM Spectrum Virtualize solution and DRPs
The Data Reduction Estimator Tool (DRET) utility uses advanced mathematical and statistical algorithms to perform an analysis with low memory footprint