File system creation involves anticipating usage within the file system and
considering your hardware configurations. Your GPFS file system is
created by issuing the mmcrfs
command. Table 3 details the file system creation options specified
on the mmcrfs command, which options can be changed later with the mmchfs command, and what the default values
are.
Table 3. File system creation options
|
| mmcrfs | mmchfs | default value |
|---|---|---|---|
| Automatic mount | X | X | yes |
| Estimated node count | X | this value cannot be changed | 32 |
| Block size | X | this value cannot be changed | 256K |
| Maximum number of files | X | X | file system size/1M |
| Default metadata replicas, see Recoverability considerations | X | X | 1 |
| Default data replicas, see Recoverability considerations | X | X | 1 |
| Maximum metadata replicas, see Recoverability considerations | X | this value cannot be changed | 1 |
| Maximum data replicas, see Recoverability considerations | X | this value cannot be changed | 1 |
| Activate quotas | X | X | no |
| Disk usage verification | X |
| yes |
| Enable DMAPI | X | X | no |
| Mountpoint directory | X | X | none |
| Device name of the file system | X | this attribute cannot be changed | none |
| Disks for the file system | X | use mmadddisk and mmdeldisk respectively to add or delete disks from the file system | none |
| Nodeset to which the file system belongs | X | X | the nodeset from which the mmcrfs command is issued |
|
Notes:
| |||