Hi,
We are currently using NetApp to store large amount of datasets. While working with the data, we delete or update some of the files. I have noticed that, when the files are deleted, the space is not cleared from the NetApp. I am wondering when do we see the freed space back or do we need to do something after deleting the files.
For deleting files, we just use rm <file_name>
@GargNikhilData61DocklandsGS-0270 For better understanding the issue: Are you referring to Azure NETAPP files?
Yes, I believe we are using Azure NetApp files (I think ANF is the acronym).
The issue I noticed was, we had files of size 3.3Tb files but the whole of 4Tb was used. I was not sure why 0.7Tb space not released after the files were deleted.
@GargNikhilData61DocklandsGS-0270 Firstly, apologies for the delay in responding here! Azure NetApp Files has a snapshot feature that efficiently uses pointers to create copies of file data on the volume. The blocks in the volume can have multiple pointers as a results of taking snapshots. If you delete a file whose blocks are in use by snapshots, the space is not returned until the snapshot is also removed. Not sure if snapshots were taken, but this can explain the behavior you’re seeing. For details, please check How Azure NetApp Files snapshots work | Microsoft Docs.
If in this case no snapshots were taken, more investigation will have to be performed. You can contact the support team!
Please let us know if you have any further queries. I’m happy to assist you further.
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