Snapshot usage alerted by ActiveIQ Unified Manager on SVM root volumes

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Visibility:: Public

Votes:: 0

Category:: ontap-9

Specialty:: core

Last Updated:

Applies to

ONTAP9
Snapshot Reserve
Load Sharing SnapMirror (LSM)
ActiveIQ Unified Manager

Issue

Unexpected high Snapshot usage on SVM root volumes exceeding default Snapshot Reserve
ActiveIQ Unified Manager alerting Risk Volume Snapshot Reserve Space Full on SVM root volume or one of its Load Sharing SnapMirror target volumes

Risk          - Volume Snapshot Reserve Space Full

Impact Area   - Protection

Severity      - Warning

State         - New

Source        - multi_protocol:/svm1_root_volume

Cluster Name  - cluster01

Cluster FQDN  - cluster01.local

Trigger Condition - The Snapshot reserve full threshold set at (90%) is breached. 94.50 MB of 102.40 MB is used

volume show-space shows major capacity in snapshots only, Total and Snapshot Reserve are almost identical

Volume : svm1_root_volume

      Feature                                           Used      Used%
      --------------------------------      ----------------      -----
      User Data                                       48.0KB         0%
      Filesystem Metadata                              400KB         0%
      Inodes                                          24.0KB         0%
      Snapshot Reserve                                51.1MB         5%
      Total                                           52.0MB         5%
      Total Physical Used                             10.6MB         1%
      Logical Used                                     868KB         0%

      Logical Available                                971MB        95%

df shows, snapshot reserve being exceeded despite root volume being empty

/vol/svm1_root_volume/ 1992296 2592 1989704 0% /vol/svm1_root_volume /vol/svm1_root_volume/.snapshot 104856 58408 46448 56% /vol/svm1_root_volume/.snapshot