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Understanding SnapMirror storage efficiency

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Applies to

  • SnapMirror
  • Storage Efficiency
  • Logical Transfer with Storage Efficiency (LRSE)
  • Logical Transfer (LRE)

Answer

  • SnapMirror preserves the storage efficiency on both the source and destination volumes unless additional forms of compression are applied to the destination, with the exception of Temperature Sensitive Storage Efficiency.
  • The below table represents storage efficiency combinations on source and destination volumes and the transfer result
    • Deduplication (D)  - Inline or background / post-process
    • Adaptive Compression (Ca) - Inline or postprocess
    • Secondary Compression (Cs) - Inline or postprocess
    • Temperature Sensitive Storage Efficiency (TSSE) - ONTAP 9.8 and later on AFF platforms
    • Logical Transfer with Storage Efficiency (LRSE) - All source-side storage efficiency savings are maintained by SnapMirror
    • Logical Transfer (LRE) - All source-side storage efficiency savings are lost during transfer, but can be re-gained at the destination
Source Destination Result
D or No storage efficiency D or No additional storage efficiency Logical Transfer with Storage Efficiency (LRSE)
D, Ca or Cs D or No additional storage efficiency Logical Transfer with Storage Efficiency (LRSE)
TSSE TSSE Logical Transfer with Storage Efficiency (LRSE)
D, Ca or Cs D, Ca or Cs Logical Transfer (LRE)
Any combination of storage efficiency Any storage efficiency including Ca or Cs Logical Transfer (LRE)

Additional Information

Parent topic: SnapMirror storage efficiency configurations and behavior

 

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