text: Although deduplication (as with other features of IBM Spectrum Virtualize) is transparent to 
  users and applications, it needs to be planned for and understood before implementation 
  because it might reduce the redundancy of a solution. For example, if an application stores 
  two copies of a file to reduce chances of data corruption by way of a random event, the copies 
  are deduplicated and thus the intended redundancy is removed from the system if these 
  copies are on the same volume. 
  
  When planning the use of deduplicated volumes be aware of update and performance 
  considerations and the following software and hardware requirements: 
  
  (cid:2) Code level V8.1.2 or higher is needed for data reduction pools. 
  
  (cid:2) Code level V8.1.3 or higher is needed for deduplication. 
  
  (cid:2) Nodes must have at least 32 GB memory to support deduplication. Nodes that have more 
  than 64 GB memory can use a bigger deduplication fingerprint database, which might lead 
  to better deduplication. 
  
  (cid:2) You must run supported IBM Storwize V7000 hardware. For more information about the 
  current table that specifies valid hardware and features combinations, see this website. 