I've been running Commvault for over 2 years and started using dedupe about 2 months ago. Seems to be working very well, but I don't trust the numbers as reported by the Policy/Properties/Dedupe tab. The CS library status shows less free space available than is accounted for in the storage policy dedupe info.
I have a pretty simple setup with a single policy for each of two mag libs.
SP Dedupe tab 4.98TB
CS Library used space 7.5TB
SP Dedupe tab 6.72TB
CS Library used space 13.5TB
I tried running various reports, but I can't get the reported numbers to match.
Anyone else seeing this? Management is after me for reports, but since I am seeing discrepancies in the used space numbers, I can't report accurately on just what dedupe is doing for my site.