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Snapshot size in TBs in SAN environment

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Category:
ontap-9
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core
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Applies to

  • ONTAP 9
  • Snapshots

Issue

  • Snapshots are consuming terabytes of space
Example_vol_1
                  weekly.2024-04-28_0015                  4.85TB     8%   20%
                  weekly.2024-05-05_0015                  1.60TB     3%    7%
                  daily.2024-05-07_0010                   1.14TB     2%    5%
                  daily.2024-05-08_0010                   1.21TB     2%    6%
                  daily.2024-05-09_0010                   1.24TB     2%    6%
                  daily.2024-05-10_0010                   1.51TB     3%    7%
                  daily.2024-05-11_0010                   1.13TB     2%    5%
                  daily.2024-05-12_0010                   1.04GB     0%    0%
  • Significant amount of metadata and snapshot spill observed from volume show-space output
Volume : Example_vol_1
      Feature                                                 Used      Used%
      ---------------------------------------------      -------------      -----
      User Data                                               18.9TB        32%
      Filesystem Metadata                                     54.8GB         0%
      Inodes                                                  24.0KB         0%
      Snapshot Reserve                                        3.00TB         5%
      Deduplication                                            109GB         0%
      Temporary Deduplication                                  486GB         1%
      Snapshot Spill                                          13.4TB        22%
      Total                                                   36.0TB        60%
      Total Physical Used                                     36.0TB        60%
      Logical Used                                            51.9TB        87%
      Logical Available                                       23.9TB        40%
 

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