How to enable S3 multipart uploads with ONTAP multi-protocol access

Procedure

1. Verify the volume is a FlexGroup:
   volume show -vserver <SVM_name> -volume <vol_name> -fields type
   
   Note: If the volume is a FlexVol, convert it to FlexGroup before continuing. This conversion is one-way and cannot be reversed.
2. Enable advanced capacity balancing (granular data) on the FlexGroup:
   volume modify -vserver <SVM_name> -volume <vol_name> -granular-data true
3. Verify the setting is active:
   volume show -vserver <SVM_name> -volume <vol_name> -fields granular-data
   
   Expected result: granular-data: true
4. Create a NAS bucket mapped to the FlexGroup junction path (skip if one already exists):
   vserver object-store-server bucket create -vserver <SVM_name> -bucket <bucket_name> -type nas -nas-path <junction_path>
5. Test a multipart upload from an S3 client. Each part must meet these requirements:
   • Size must be 1 MB aligned
   • Minimum part size: 5 MiB
   • Maximum part size: 5 GiB

Partner Notes

Additional Information

• Before converting a FlexVol to FlexGroup, create a FlexClone and split it off, or copy data to a new FlexGroup volume to preserve a rollback option.
• The convert.* snapshot that ONTAP creates automatically during conversion cannot be used to create a FlexClone.
• Conversion is irreversible once completed.

• Once enabled, granular data can only be disabled by restoring a snapshot taken before it was enabled.
• FlexGroup volumes created via the ONTAP REST API as S3 buckets have granular data enabled by default.

Internal Notes