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Can I convert a Flexvol to FlexGroup without rewarming the tiered data?

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Category:
ontap-9
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core
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Applies to

  • ONTAP 9
  • FlexGroup
  • FabricPool

Answer

Yes. FabricPool Flexible volumes with tiered data can be converted to FlexGroup without rewarming the data back to performance tier.

Additional Information

Example of converting to Flexgroup without first rewarming the data back to the performance tier

1. The following volume is not a Flexgroup

::*> volume show -volume myvol -fields is-flexgroup,tiering-policy
vserver volume is-flexgroup tiering-policy
------- ------ ------------ --------------
svm1    myvol false        auto

2. View the current footprint in your storage tier

::> volume show-footprint myvol
      Vserver : svm1
      Volume  : myvol
      Feature                                          Used    Used%
      --------------------------------           ----------    -----
      Volume Data Footprint                         14.09GB       0%
             Footprint in Performance Tier          268.5MB       2%
             Footprint in <your storage Tier>       13.84GB      98%
      Volume Guarantee                                   0B       0%
      Flexible Volume Metadata                      683.9MB       0%
      Deduplication                                 61.40MB       0%
      Cross Volume Deduplication                    143.0MB       0%
      Delayed Frees                                  6.09MB       0%
      Total Footprint                               14.97GB       0%

3. We will now convert the volume to FlexGroup

::> set advanced

Warning: These advanced commands are potentially dangerous; use them only when directed to do so by NetApp personnel.
Do you want to continue? {y|n}: y

a. run the check-only option first

::*> volume conversion start -volume myvol -foreground true -check-only true
Conversion of volume "myvol" in Vserver "svm1" to a FlexGroup can proceed with the following warnings:
* After the volume is converted to a FlexGroup, it will not be possible to change it back to a flexible volume.

b. start the conversion
::*> volume conversion start -volume myvol -foreground true

Warning: After the volume is converted to a FlexGroup, it will not be possible to change it back to a flexible volume.
Do you want to continue? {y|n}: y
[Job 35] Job succeeded: success

4. Confirm the data has not rewarmed back to the performance Tier

::*> volume show -volume myvol -fields is-flexgroup,tiering-policy
vserver volume is-flexgroup tiering-policy
------- ------ ------------ --------------
svm1    myvol  true         auto
::*> volume show-footprint myvol__0001
      Vserver : svm1
      Volume  : myvol__0001
      Feature                                          Used    Used%
      --------------------------------           ----------    -----
      Volume Data Footprint                         14.15GB       0%
             Footprint in Performance Tier          276.7MB       2%
             Footprint in sgws01                    13.84GB      98%
      Volume Guarantee                                   0B       0%
      Flexible Volume Metadata                      683.9MB       0%
      Deduplication                                 61.40MB       0%
      Cross Volume Deduplication                    143.0MB       0%
      Delayed Frees                                 12.92MB       0%
      Total Footprint                               15.03GB       0%

 

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