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Does ONTAP apply efficiencies to blocks that are tiered-out to Fabricpool?

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Category:
ontap-9
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CORE
Last Updated:

Applies to

  • ONTAP 9
  • Fabricpool
  • Efficiency
  • Deduplication
  • Compression
  • Compaction
  • Logical Replication Engine (LRE)

Answer

No, if a block gets tiered out before efficiency was applied in active file system (AFS), the block will remain in capacity-tier without efficiency applied.

Additional Information

  1. File or Block was written to a RW volume
  2. Inline efficiency was NOT applied
    • FAS with no inline efficiency supported
    • AFF under high write workload causing inline miss or inline efficiency disabled
    • DP volume updated from Snapmirror using classic Logical Replication Engine (LRE) without storage efficiencies over the wire
  3. Block is tracked in volume efficiency change-log to be picked up by next efficiency background job to scan/apply efficiency to it
  4. Background efficiency schedule did NOT yet trigger
  5. Configured tiering-minimum-cooling-days has passed and volume tiering scanner runs
  6. File or Block written in 1 is tiered out to capacity/cloud tier
  7. Background efficiency schedule triggers
  8. File or Block written in 1 remains in capacity without efficiencies applied
     
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