topic Question with Regard to Operations Manager reporting that an Aggregate is over de-duplicated in Active IQ Unified Manager Discussions

Question with Regard to Operations Manager reporting that an Aggregate is over de-duplicated

pmonte — Thu, 05 Jun 2025 07:07:08 GMT

I have a customer receiving the following message from Operations Manager:

Deduplication : Aggregate is nearly over deduplicated
Source		javascript&colon;filer_view_open_win('https://kstlneapp02.corp.chartercom.com:443/api?api=/util/true&onsuccess=fv&jumpTo=netapp.fv.volumes.manage.AggregateList',%20'DFM_FilerView_0118059552',%20'resizable=yes,status=yes,scrollbars=no,width=780,height=580'); kstlneapp02:aggr1_FC
Severity		Warning
About		Overdeduplication level of the aggregate
Condition		Over deduplication percentage ( 140.03% ) of the aggregate exceeds the nearly over deduplicated threshold ( 140.00% ). Increase the threshold or add disks to the aggregate.
Triggered		05 Oct 03:41
Notified
Acknowledged		No
Deleted		No

Can anyone tell me what this means and what action is supposed to be taken?

Thanks,

Phil Monte

Re: Question with Regard to Operations Manager reporting that an Aggregate is over de-duplicated

karl_pottie — Fri, 15 Oct 2010 13:02:37 GMT

As far as I understand it, this is a harmless warning and it means that should you ever decide to un-deduplicate all data, there will not be enough storage to do that.

Don't know why anybody would ever consider to un-deduplicate their data, so simply ignore the message or reconfigure dfm to set this threshold to 200% or higher.

Re: Question with Regard to Operations Manager reporting that an Aggregate is over de-duplicated

adaikkap — Fri, 15 Oct 2010 13:08:14 GMT

Or use the dfm eventtype modify to modify the severity of the event.

Regards

adai

Re: Question with Regard to Operations Manager reporting that an Aggregate is over de-duplicated

rshiva — Fri, 15 Oct 2010 22:34:47 GMT

Hi,

The main reason why we have to keep tab over deduplication rate (deduplication threshold) is when you undedupe a volume, we need to ensure that the volume doesn't runout of capacity.

Thanks and regards

Shiva Raja

Re: Question with Regard to Operations Manager reporting that an Aggregate is over de-duplicated

amiller_1 — Sat, 16 Oct 2010 02:49:47 GMT

I usually joke about this with customers....basically just means that "dedup is working really well".