Hi King[NAME],  There are a few resources to help with SmartDedupe: White Paper: Next-Generation Storage Efficiency with Isilon SmartDedupe [URL]  Technical Demo: EMC Isilon SmartDedupe - YouTube
Do you have any figure how much deduplication can be expected for each data for Isilon dedupe?  And I also would like to know what the average dedup percentage for bitmap file is?
Isilon Dedupe parcentage