Capacity Terminology

capacity dashboard


  • Raw Capacity: The total raw aggregated capacity of the system devices (nodes) in the cluster.
    Raw Capacity = (Number of Nodes - 1) * Capacity of Each Node
  • Effective Capacity: Capacity available for user to write into the cluster.


The utilized capacity of the system devices in the cluster

  • Raw Utilization: Data stored in the disk. Actual data size before taking into consideration data reduction and replication level. This includes snapshots.
    Used Raw = Used Effective * 2 [For Replication] / Data Reduction Ratio
  • Effective Utilization: Data written into the cluster. Predicted data size based on current data reduction factor.


  • Replication is enabled by default.
  • Compression is disabled by default but recommended to enable it to improve utilization. 
  • The Used RAW capacity might be higher in case of snapshots. 
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