红帽全球峰会2.4. Examples of VDO requirements by physical size
VDO system requirements vary by physical volume size and deployment type, with specific RAM and disk usage examples for primary storage and backup storage scenarios.
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.
Expand 表 2.1. Examples of storage and memory configurations for primary storage Physical size RAM usage: UDS RAM usage: VDO Disk usage Index type 1 TB
250 MB
472 MB
2.5 GB
Dense
10 TB
1 GB
3 GB
10 GB
Dense
250 MB
22 GB
Sparse
50 TB
1 GB
14 GB
85 GB
Sparse
100 TB
3 GB
27 GB
255 GB
Sparse
256 TB
5 GB
69 GB
425 GB
Sparse
- Backup storage deployment
In the backup storage case, the deduplication window must be larger than the backup set. If you expect the backup set or the physical size to grow in the future, factor this into the index size.
Expand 表 2.2. Examples of storage and memory configurations for backup storage Deduplication window RAM usage: VDO Disk usage Index type 1 TB
250 MB
2.5 GB
Dense
10 TB
2 GB
21 GB
Dense
50 TB
2 GB
170 GB
Sparse
100 TB
4 GB
340 GB
Sparse
256 TB
8 GB
700 GB
Sparse
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