Appendix A

NetApp HCI storage system uses the following technologies to increase the efficiency & performance of storing data. 
These efficiencies are done inline and they are always on and require no configuration in the NetApp HCI storage system. 

Technology	Description	
Global Deduplication	
NetApp HCI systems store only unique 4K blocks. Any duplicate 4K blocks are automatically associated to an already stored version of the data. Data is on block drives and is mirrored via the NetApp HCI Double-Helix feature. This significantly reduces capacity consumption and write operations within the system.
	
Multi-layer Compression	
Data compression on NetApp HCI is done inline and before it is written to NVRAM. Data is compressed and stored in 4k blocks and, once compressed, data remains compressed in the system. This significantly reduces capacity consumption, write operations, and bandwidth consumption across the cluster.
	
Thin Provisioning	
Thin Provisioning provides the right amount of storage at the time it is needed. This eliminates capacity consumption due to over provisioning volumes or underutilized volumes.