How to determine sparseness or deduplication ratio of a file
Applies to
- ONTAP 9
- NAS volume
- Sparse file
- Storage Efficiency Deduplication
Description
- Sparse files set pre-allocated space within root inode but do not use any blocks
- Examples for sparse files can be KVM/QEMU virtual disk files
- ONTAP storage efficiency deduplication does reduce physical block usage for a file non-sparse data
- Deduplicated size of a file can be inspected using ONTAP command
volume file show-disk-usage
on NAS volumes