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What is the meaning of "Total%" and "Used%" in "snapshot show"?

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Category:
ontap-9
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core
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Applies to

  • ONTAP 9
  • Volume Snapshots

Answer

  •  Total% - percentage of total blocks in the volume
    • Calculation: snapshot size/volume size
  •  Used% - percentage of used blocks in the volume
    • Calculation: snapshot size/(snapshot size + volume used size)
    • Example: How to confirm the volume used size by df -h command and the calculation of snapshot Used%:
cluster1::>snapshot show
svm1
vol1
weekly.2021-02-07_0015                   912KB     0%   10%
weekly.2021-02-14_0015                  4.02MB     0%   32%

cluster1::> df -volume vol1 -vserver svm1 -h
Filesystem               total       used      avail capacity  Mounted on
/vol/vol1/               475GB     8568KB      474GB       0%  ---
/vol/vol1/.snapshot       25GB     6400KB       24GB       0%  ---

912MB/(912KB+8568KB) = approximately 10%
4.02MB/(4.02MB+8568KB) = approximately 32%

Additional Information

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