2.3. Examples of VDO requirements by physical size
The following tables provide approximate system requirements of VDO based on the physical size of the underlying volume. Each table lists requirements appropriate to the intended deployment, such as primary storage or backup storage.
The exact numbers depend on your configuration of the VDO volume.
- Primary storage deployment
In the primary storage case, the UDS index is between 0.01% to 25% the size of the physical size.
Tableau 2.1. Storage and memory requirements for primary storage Physical size RAM usage: UDS RAM usage: VDO Utilisation du disque Index type 10GB–1TB
250MB
472MB
2.5GB
Dense
2–10TB
1GB
3GB
10GB
Dense
250MB
22GB
Sparse
11–50TB
2GB
14GB
170GB
Sparse
51–100TB
3GB
27GB
255GB
Sparse
101–256TB
12GB
69GB
1020GB
Sparse
- Backup storage deployment
In the backup storage case, the UDS index covers the size of the backup set but is not bigger than the physical size. If you expect the backup set or the physical size to grow in the future, factor this into the index size.
Tableau 2.2. Storage and memory requirements for backup storage Physical size RAM usage: UDS RAM usage: VDO Utilisation du disque Index type 10GB–1TB
250MB
472MB
2.5 GB
Dense
2–10TB
2GB
3GB
170GB
Sparse
11–50TB
10GB
14GB
850GB
Sparse
51–100TB
20GB
27GB
1700GB
Sparse
101–256TB
26GB
69GB
3400GB
Sparse
