430 Implementing the IBM Storwize V7000 with IBM Spectrum Virtualize V8.2.1
To analyze all the volumes that are on the system, run the CLI analyzevdiskbysystem 
command.
The use of the command analyzes all the current volumes that are created on the system. 
Volumes that are created during or after the analysis are not included and can be analyzed 
individually. Progress for analyzing of all the volumes on system depends on the number of 
volumes that are being analyzed and results can be expected at about a minute per volume. 
For example, if a system has 50 volumes, compression savings analysis takes approximately 
50 minutes.
You can run analysis on a single volume by specifying its name or ID as a parameter for the 
analyzevdisk CLI command.
To check the progress of the analysis run the lsvdiskanalysisprogress command. This 
command displays the total number of volumes on the system, total number of volumes that 
are remaining to be analyzed, and estimated time of completion.
The command lsvdiskanalysis is used to display information for thin provisioning and 
compression estimation analysis report for all volumes. 
You can also use the GUI to run analysis. Navigate to the Volumes pane, right-click any 
volume, and select Space Savings → Estimate Compression Savings, as shown in 
Figure 10-18.
Figure 10-18   Compresstimator submenu
This action shows you the results of the latest estimation cycle and the date when it was 
completed. If no analysis was done yet, the system suggests running it.
To run or rerun on a single volume, select Analyze in Space Savings submenu.
If you are using a version of IBM Spectrum Virtualize that is older than V7.6 or if you want to 
estimate the compression savings of another IBM or non-IBM storage system, the separate 
IBM Comprestimator Utility can be installed on a host that is connected to the device that 
needs to be analyzed. More information and the latest version of this utility, see this IBM 
Support web page.
Consider the following recommended best practices for using Comprestimator:
/SM590000Run the Comprestimator utility before implementing an IBM Spectrum Virtualize solution 
and DRPs.
/SM590000Download the latest version of the Comprestimator utility if you are not using one that is 
included in your IBM Spectrum Virtualize solution.
/SM590000Use Comprestimator to analyze volumes that contain as much active data as possible 
rather than volumes that are nearly empty or newly created. This use ensures more 
accuracy when sizing your environment for compression and DRPs.