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NetApp Knowledge Base

What is SnapMirror lag time?

Last Updated:

Applies to

  • ONTAP 9
  • SnapMirror


  • SnapMirror relationship lag is the difference between when a snapshot is created and the system time on the destination when the next transfer completes
    • For example
      • A snapshot is created at 08:00
      • A scheduled SnapMirror update runs at 12:00
      • The transfer takes 15 minutes to complete
      • Lag time will be 4 hours and 15 minutes
        • How is that calculated? The difference between snapshot creation time and initiating the transfer is 4 hours, plus 15 minutes for the transfer to complete
  • When examined in the context of snapshot timestamp, and the duration of the transfer, "long" lag times are often found to be normal


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