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What is the latency impact for IO to SnapMirror Synchronous Source Volume?

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Category:
snapmirror
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dp
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Applies to

  • ONTAP 9.7+
  • SnapMirror Synchonius 

Answer

  • SnapMirror Synchronous can run in 2 modes:
    • In SnapMirror Synchronous Sync mode, the volume I/O  will be committed first to the remote volume and can be delayed up to 10 ms before the I/O is committed to the source volume and the Synchronous SnapMirror will go out of Sync
    • SnapMirror Synchronous StrictSync mode if the I/O is not confirmed within 10 ms timeout by the remote volume, then the I/O will fail