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Different number of snapshot count seen on source and destination cluster in SM-BC

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Applies to

  • ONTAP 9
  • SMBC (SnapMirror Business Continuity)
  • Common Snapshot Schedule (CSS)
  • Consistency Groups (CGs)

Issue

  • There is snapshot policy set on source CGs to maintain local snapshots.
  • Snapshot Copy Policy: default-1weekly
  • Which keeps 1 each for daily, weekly and hourly snapshot on each volume on source cluster CG.
  • Which is working as expected.
Source cluster:
Vserver  Volume   Snapshot                                  Size Total% Used%
-------- -------- ------------------------------------- -------- ------ -----
SVM_PRD  DRC_SR_VMWARE_01_A1
weekly_16203c70-9578-11ee-b3b8-d039ea56b41c.2024-10-13_0015 388.3GB 3% 13%
snapmirror.1f8b80ae-4eab-11ec-81de-d039ea4b78c6_2156583412.2024-10-15_121458 43.02GB 0% 2%
snapmirrorCG.1f8b80ae-4eab-11ec-81de-d039ea4b78c6_2156583412.2024-10-16_121610 35.12GB 0% 1%
daily_16203c70-9578-11ee-b3b8-d039ea56b41c.2024-10-17_0010 23.99MB 0% 0%
snapmirrorCG.1f8b80ae-4eab-11ec-81de-d039ea4b78c6_2156583412.2024-10-17_001501 20.38GB 0% 1%
hourly_16203c70-9578-11ee-b3b8-d039ea56b41c.2024-10-17_1605 38.60MB 0% 0%
  • However, on destination cluster a greater number of snapshots are seen compared to Source cluster.
Destination cluster:
Vserver  Volume   Snapshot                                  Size Total% Used%
-------- -------- ------------------------------------- -------- ------ -----
SVM_DR DRC_PQ_VMWARE_01_A1_dest
weekly_826c17db-9577-11ee-b3b8-d039ea56b41c.2024-10-13_0015 35.93GB 1% 1%
snapmirror.1f8b80ae-4eab-11ec-81de-d039ea4b78c6_2156583406.2024-10-13_200127 56.86MB 0% 0%
snapmirror.1f8b80ae-4eab-11ec-81de-d039ea4b78c6_2156583406.2024-10-13_200151 345.4GB 7% 12%
snapmirrorCG.1f8b80ae-4eab-11ec-81de-d039ea4b78c6_2156583406.2024-10-16_121610 77.43GB 2% 3%
hourly_826c17db-9577-11ee-b3b8-d039ea56b41c.2024-10-17_0005 50.90MB 0% 0%
daily_826c17db-9577-11ee-b3b8-d039ea56b41c.2024-10-17_0010 71.20MB 0% 0%
snapmirrorCG.1f8b80ae-4eab-11ec-81de-d039ea4b78c6_2156583406.2024-10-17_001501 239.3MB 0% 0%
hourly_826c17db-9577-11ee-b3b8-d039ea56b41c.2024-10-17_0105 37.39GB 1% 1%
hourly_826c17db-9577-11ee-b3b8-d039ea56b41c.2024-10-17_0205 6.52GB 0% 0%
hourly_826c17db-9577-11ee-b3b8-d039ea56b41c.2024-10-17_0305 26.31GB 1% 1%
hourly_826c17db-9577-11ee-b3b8-d039ea56b41c.2024-10-17_0405 188.2MB 0% 0%
hourly_826c17db-9577-11ee-b3b8-d039ea56b41c.2024-10-17_0505 30.89GB 1% 1%
hourly_826c17db-9577-11ee-b3b8-d039ea56b41c.2024-10-17_0605 263.1MB 0% 0%
hourly_826c17db-9577-11ee-b3b8-d039ea56b41c.2024-10-17_0705 27.78GB 1% 1%
hourly_826c17db-9577-11ee-b3b8-d039ea56b41c.2024-10-17_0805 307.5MB 0% 0%
hourly_826c17db-9577-11ee-b3b8-d039ea56b41c.2024-10-17_0905 35.00GB 1% 1%
hourly_826c17db-9577-11ee-b3b8-d039ea56b41c.2024-10-17_1005 30.61GB 1% 1%
hourly_826c17db-9577-11ee-b3b8-d039ea56b41c.2024-10-17_1105 24.88GB 1% 1%
hourly_826c17db-9577-11ee-b3b8-d039ea56b41c.2024-10-17_1205 142.1MB 0% 0%

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