topic Re: Data Optimization and FlexGroups - Volume Constituants in ONTAP Discussions

Data Optimization and FlexGroups - Volume Constituants

JFM — Wed, 04 Jun 2025 10:06:34 GMT

Hi,

On an AFF unit, using a flexgroup where constituents are spread across both nodes of the controller, are blocs dedupped across all constituents sitting on the same aggregate only or across all constituents across all aggregate? According to this: https://docs.netapp.com/us-en/ontap/flexgroup/enable-storage-efficiency-task.html I would extrapolate to think that data optimization "domain" is still local aggregates only. Am I correct?

In other words, two identical blocs stored in constituents sitting on two different aggregates wouldn't be optimized and stay as is.

Thanks for your input.

Re: Data Optimization and FlexGroups - Volume Constituants

SpindleNinja — Thu, 06 Jan 2022 16:38:59 GMT

It's per aggr.

Re: Data Optimization and FlexGroups - Volume Constituants

JFM — Thu, 06 Jan 2022 17:14:02 GMT

So, I guess my understanding was right.

Re: Data Optimization and FlexGroups - Volume Constituants

parisi — Fri, 07 Jan 2022 14:22:44 GMT

Eh, it's per aggr for cross-volume dedupe.

It's per member/constituent volume for other efficiencies. Check TR-4571 for details.

https://www.netapp.com/us/media/tr-4571.pdf - starting on page 71

Re: Data Optimization and FlexGroups - Volume Constituants

SpindleNinja — Tue, 11 Jan 2022 20:24:27 GMT

Technically correct, the best kind of correct.