Gratuit · Réseau et infrastructure IT
Calculateur de stockage de sauvegarde.
Estimez le stockage de sauvegarde selon le volume, le taux de changement, la croissance, le schéma, la rétention GFS, la déduplication et les copies externes.
- Protected data after one year of growth
- 12 TB
- Daily changed data
- 360 GB
- Logical backup data
- 147.79 TB
- After compression and deduplication
- 73.9 TB per copy
- Restore points
- 31
- Oldest restore point
- 3 years
One copy before data reduction
| Component | Logical size (TB) |
|---|---|
| Full backups in the daily chain (3) | 16.61 |
| Incrementals (12) | 4.32 |
| Weekly points beyond the daily window (2) | 4.61 |
| Monthly points (12) | 86.25 |
| Yearly points (3) | 36 |
- An estimate: real change rates vary by day and workload, and incremental size counts each changed block once per day.
- With block cloning, a synthetic full only stores blocks changed since the previous one, estimated as 1 − (1 − daily change)^days; without it, every full point stores a complete copy. Data that changes the same blocks repeatedly needs less.
- The 3-2-1 rule: three copies of data, on two different media, one off-site — ideally one immutable or offline copy against ransomware.
Comment utiliser cet outil: Calculateur de stockage de sauvegarde
Saisissez ou sélectionnez vos données. Réglez les options, générez le résultat puis vérifiez-le avant de le copier ou de le télécharger.
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Notes techniques en anglais
An estimate: changes are assumed to fall on random blocks; real workloads often rewrite the same blocks. Product-specific metadata is not included. Everything is calculated in your browser; nothing is sent or probed on the network.
Fulls cost the full size; incrementals cost the daily change; with block cloning, a synthetic full stores the unique change since the previous one, 1 − (1 − c)^days. Totals are divided by data reduction and multiplied by copies and headroom.
10 TB with 3 % daily change, 14 daily, 4 weekly, 12 monthly and 3 yearly points, 2:1 reduction and two copies needs about 177 TB with block cloning.