Space Pre-Allocation
The following tables provide an estimation of the pre-allocated (reserved) space for various file-system functions. These calculations can help you estimate disk space requirements and space growth of FluidFS systems.
Table 1. Reserved Space by Function
Allocation per
|
Reserved space
|
Cluster
|
10.4 GB
|
Appliance
|
345.5 GB
|
LUN
|
4 GB
|
Data Reduction
|
0.012% of total space, minimum 16 GB, maximum 256 GB
|
Total space
|
0.5%
|
The amount of reserved space can also be estimated using the following table.
Table 2. Reserved Space by Pool Size
NAS Pool Size
|
Percentage of Reserved Space
|
10 TB – 20 TB
|
2.5% – 4.5%
|
20 TB – 128 TB
|
1% – 2.5%
|
> 128 TB
|
< 1 %
|