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No compression savings in ONTAP 9.9 volume layer

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Applies to

  • ONTAP 9.8 and later
  • Temperature Sensitive Storage Efficiency (TSSE)

Issue

  • Volume shows deduplication savings, but no space saved by compression:
::*> volume show -volume vol* -fields dedupe-space-saved,dedupe-space-saved-percent,compression-space-saved,compression-space-saved-percent

vserver  volume               dedupe-space-saved dedupe-space-saved-percent compression-space-saved compression-space-saved-percent
-------- -------------------- ------------------ -------------------------- ----------------------- -------------------------------
svm1     vol3                 111.6GB            7%                         0B                      0%
svm1     vol4                 184.2GB            10%                        0B                      0%
  • df command will always show 0 in the compressed column 
cluster1::*> df -h -S -volume tsse_test

Warning: The "-S" parameter is deprecated and may be removed in a future release. To show the efficiency ratio use "aggr show-efficiency" command.
Filesystem                used       total-saved    %total-saved    deduplicated    %deduplicated    compressed
/vol/tsse_test/          623MB             494MB             44%           494MB              44%            0B

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