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Why are Cloud Backups larger than On-Premises storage usage?

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Applies to

  • NetApp Console (BlueXP)
  • On-Premises ONTAP clusters
  • Backup and Recovery

Answer

  • NetApp ONTAP on-premises clusters use storage efficiency features such as deduplication and compression, which significantly reduce the physical storage footprint.
  • When backing up to the cloud (e.g., AWS S3), the backup process does not preserve these storage efficiencies.
  • As a result, the logical size of the backed-up data (uncompressed, un-deduplicated) is larger than the physical used space shown on the on-premises cluster.

Additional Information

    Shows if storage efficiencies are enabled:

 

volume efficiency show -vserver <your_vserver_name>

 

  • Shows deduplication status:

storage aggregate efficiency show

  • Physical storage:

 df -h <volume_name>

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