Before you configure your GPFS nodeset, insure you have tuned your system (see Tuning your SP system for GPFS and Tuning your HACMP cluster for GPFS).
Configuration involves defining the nodes to be included in the GPFS nodeset
and specifying how they will operate. Your GPFS nodeset is configured
by issuing the mmconfig command.
Table 2 details the configuration options specified on the
mmconfig command, which options can be changed later with the mmchconfig command, and what the default
values are.
Table 2. GPFS configuration options
|
| mmconfig | mmchconfig | default value |
|---|---|---|---|
| Nodes in your GPFS nodeset | X | To add or delete nodes at a later time use mmaddnode or mmdelnode respectively | In an SP environment, all of the nodes in the SDR.
In an HACMP environment, all nodes in the GPFS cluster |
| Use designation of each node | X | X | All nodes are included in the pool from which the File System Manager is chosen |
| Nodeset identifier | X | This cannot be changed once it is set | An integer value beginning with one and increasing sequentially |
| Starting GPFS automatically | X | X | no |
| Path for the storage of dumps | X | X | /tmp/mmfs |
|
| X | X | TCP/IP |
| Quorum | X | X | no |
| pagepool | X | X | 20M |
| maxFilesToCache | X | X | 1000 |
| maxStatCache | Default value initially used | X | 4 x maxFilesToCache |
| Maximum file system block size allowed | Default value initially used | X | 256K |
| (EVENTIM) |
| X | 86400000 |
| (SESFAIL) |
| X | 0 |
| (MNTIME) |
| X | 60 |
|
Notes:
| |||