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When does a restartable SnapMirror checkpoint gets deleted

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Applies to

  • ONTAP 9 and later
  • ONTAP 8.3

Answer

  • From the destination cluster, use the SnapMirror show command with the -snapshot-checkpoint parameter to view the status of the baseline transfer and the restart checkpoint.

Example

cluster2::> snapmirror show -destination-path dest_vserver:vol3 -fields snapshot-checkpoint
source-path          destination-path snapshot-checkpoint
-------------------- ---------------- -------------------
src_system:vol3    dest_vserver:vol3 50MB
  • If the SnapMirror checkpoint exists, use the SnapMirror initialize command to resume the baseline transfer.

Example

cluster2::> snapmirror initialize -destination-path dest_vserver:vol3

However, at times the restartable checkpoint can be deleted under one of the below criterions

  1. If volume is marked offline and deleted by any means.
  2. If a 'SnapMirror break' command is issued against the relationship.
  3. If a SnapMirror with the hard abort switch is issued. Performing a hard abort deletes the checkpoint.

If the restartable checkpoint is deleted , restarting the transfer will start from the beginning and not from the checkpoint.

 

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