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What is NDMP file history back pressure and what impact does it have?

  1. Last updated
    Jun 10, 2024
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ndmp
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Last Updated:
6/10/2024, 3:07:53 PM

Applies to

  • ONTAP 9
  • NDMP

Answer

  • Generating, communicating, and ingesting file history will always add some overhead to a backup.
    • A backup typically always runs faster with file history disabled even if there are no other performance issues.
    • A bottleneck in one step of file history communication can trigger latencies downstream.
  • Due to the way NDMP and dump work together, latency in file history delivery or ingestion can cause a slow-down in the overall backup performance.
    • In other words, dump cannot continue writing data to the backup stream until the associated file history is completely ingested and acknowledged by the backup application / DMA.

Additional Information

FAQ: NDMP File history

 

 

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