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How to promote deprioritized FlexVol volumes

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Applies to

  • ONTAP 9.3 to 9.10
  • All Flash FAS (AFF)

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 predefined auto AFF policy in order to run automatically

::*> volume efficiency show -fields policy


vserver volume policy
------- ------ ------
svm1    vol3   auto
svm1    vol2  auto
svm1    vol1   auto

 

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