Data Reduction Estimation Tool

The Data Reduction Estimation Tool (DRET) is a command-line, host-based utility for estimating data reduction savings on block storage devices. To help with the profiling and analysis of existing user workloads that must be migrated to a new system, IBM provides the highly accurate DRET to support both deduplication and compression. The tool scans target workloads on various legacy storage arrays (from IBM or another company), merges all scan results, then provides an integrated system-level data reduction estimate.

To use deduplication on the system, the hardware must have at least 32 GB of memory.

You download DRET and its readme file to a Windows client and follow the installation instructions in the readme. The readme file also describes how to use DRET on a variety of host servers.

Go to https://www-945.ibm.com/support/fixcentral/ to search under IBM Spectrum Virtualize to find the tool and its readme.

Note: It is recommended that you also use management GUI or the command-line interface to run the integrated Comprestimator Utility to gather data for potential compression savings for volumes in data reduction pools.