How to promote deprioritized FlexVol volumes
Applies to
- ONTAP 9.3 or later
- All Flash FAS (AFF)
- Automatic Dedup Schedule (ADS)
Description
On AFF, the system monitors all the volumes having the auto policy and deprioritizes the volume that has less savings or has frequent overwrites
- The deprioritized volumes no longer participate in automatic background deduplication
- Change logging on deprioritized volumes is disabled and metadata on the volume is truncated
Users can promote the deprioritized volume to re-participate in an automatic background deduplication using the volume efficiency promote command available at the advanced privilege level
- verify by running
::>event log show -node <node_name> -message-name sis.vol.savings.depri
EMS Example:
Thu May 02 00:05:38 EDT [node_name: dense_worker: Sis.Volume.Savings.Deprioritized:info]: Auto Dedupe Scheduling on volume vol1(1) deprioritized : low savings (0%%) against minimum (10%%).
or
- run
volume efficiency show. volume-level background deduplication requires the predefinedautoAFF policy in order to run automatically
::*> volume efficiency show -fields policy
vserver volume policy
------- ------ ------
svm1 vol3 auto
svm1 vol2 auto
svm1 vol1 auto