Understanding SnapMirror storage efficiency
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