text: (cid:2) Overhead capacity 
  
  The amount of usable capacity occupied by metadata in a pool or system and other data 
  used for system operation. 
  
  (cid:2) Total capacity savings 
  
  The total amount of usable capacity saved in a pool, system, or volume through 
  thin-provisioning and data reduction techniques. This capacity saved is the difference 
  between the used usable capacity and the provisioned capacity. 
  
  (cid:2) Data reduction 
  
  The techniques used to reduce the size of data including deduplication and compression. 
  
  (cid:2) Data reduction savings 
  
  The total amount of usable capacity saved in a pool, system, or volume through the 
  application of a compression or deduplication algorithm on the written data. This capacity 
  saved is the difference between the written capacity and the used capacity 
  
  (cid:2) Thin provisioning savings 
  
  The total amount of usable capacity saved in a pool, system, or volume by using usable 
  capacity when needed as a result of write operations. The capacity saved is the difference 
  between the provisioned capacity minus the written capacity. 
  
  (cid:2) Over provisioned 
  
  A storage system or pool where there is more provisioned capacity than there is usable 
  capacity. 