topic Storage efficiency lost on destionation location in ONTAP Discussions

Storage efficiency lost on destionation location

Jerry2 — Wed, 04 Jun 2025 10:01:43 GMT

Hi there,

if there is replication from AFF system to FAS (NL-SAS), which storage efficiency will be lost on the destination? In the documentation there is written (https://docs.netapp.com/us-en/ontap/data-protection/manage-storage-efficiency-task.html

SnapMirror preserves storage efficiency on the source and destination volumes, with one exception, when postprocess data compression is enabled on the destination. In that case, all storage efficiency is lost on the destination. To correct this issue, you need to disable postprocess compression on the destination, update the relationship manually, and re-enable storage efficiency.

Is it valid for both FAS to FAS and AFF to FAS replication?

Re: Storage efficiency lost on destionation location

hmoubara — Tue, 26 Apr 2022 06:05:09 GMT

@Jerry2

Yes the above is valid for both replication

Re: Storage efficiency lost on destionation location

Jerry2 — Tue, 26 Apr 2022 07:48:30 GMT

Hi @hmoubara, thanks for the input.

Then, I think, compression is lost on the SnapMirror destination, isnt it?

Re: Storage efficiency lost on destionation location

hmoubara — Tue, 26 Apr 2022 08:44:40 GMT

Yes if postprocess data compression is enabled on the destination. You will need to follow the recommended steps in able to preserve compression or any other storage efficiency.

Thanks

Re: Storage efficiency lost on destionation location

amccullo — Wed, 27 Apr 2022 02:55:33 GMT

Hello Jerry,

The following KB article should help explain SnapMirror storage efficiency behaviors for various configurations, including AFF systems:

https://kb.netapp.com/Advice_and_Troubleshooting/Data_Protection_and_Security/SnapMirror/Understanding_SnapMirror_storage_efficiency