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Unreferenced capacity is growing with the tiering policy set to all on all volumes

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Category:
ontap-9
Specialty:
CORE
Last Updated:

Applies to

  • ONTAP 9
  • FabricPool
  • SnapMirror

Issue

  • The cluster is used as a SnapMirror destination.
  • All volumes on the destination cluster have the -tiering-policy set to all:

::> vol show -node <node-name> -tiering-policy all -count-only 
Entries found: 450

  • The unreferenced capacity is growing for the affected FabricPool aggregate:

::>  storage aggregate show-space -aggregate <aggregate_name>

Aggregate : aggregate_name
Performance Tier
Feature                                          Used      Used%
--------------------------------           ----------     ------
Volume Footprints                             418.8TB       301%
Aggregate Metadata                                 0B         0%
Snapshot Reserve                                   0B         0%
Total Used                                    68.59TB        49%

Total Physical Used                           62.71TB        45%

Total Provisioned Space                        1.36PB       999%

Aggregate : aggregate_name
Object Store: object_store_name
Feature                                          Used      Used%
--------------------------------           ----------     ------
Logical Used                                   1.12PB          -
Logical Referenced Capacity                   700.3TB          -
Logical Unreferenced Capacity                 441.7TB          -
Space Saved by Storage Efficiency             244.8TB          -

Total Physical Used                           897.2TB          -

 

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