8.2. Configuration
The values in the flat files in the /proc/hpc/admin directory presenting
the current configuration of
the cluster. Also the administrator can write its own values into these
files to change the configuration
during runtime, e.g.
Table 8-1. Changing /proc/hpc parameters
| echo 1 > /proc/hpc/admin/block | blocks the arrival of remote processes |
| echo 1 > /proc/hpc/admin/bring | bring all migrated processes home |
...
Table 8-2. /proc/hpc/admin/
| (binary files) | config | the main configuration file (written by the setpe util) |
| (flat files) | block | allow/forbid arrival of remote processes |
| | bring | bring home all migrated processes |
| |
dfsalinks | list of current symbolic dfsa-links |
| |
expel | sending guest processes home |
| |
gateways | maximum number of gateways |
| |
lstay | local processes should stay
|
| |
mospe | contains the openMosix node id |
| |
nomfs | disables/enables MFS |
| |
overheads | for tuning |
| |
quiet | stop collecting load-load-balancing informations |
| |
decay-interval | interval for collecting informations about load-balancing |
| |
slow-decay | default 975 |
| |
fast-decay | default 926 |
| |
speed | speed relative to PIII/1GHz) |
| |
stay | enables/disables automatic process migration |
Table 8-3. Writing a 1 to the following files /proc/hpc/decay/
|
clear | clears the decay statistics |
|
cpujob | tells openMosix that the process is cpu-bound |
| iojob | tells openMosix that the process is io-bound |
|
slow | tells openMosix to decay its statistics slow |
| fast | tells openMosix to decay its statistics fast |
Table 8-4. Informations about the other nodes
| /proc/hpc/nodes/[openMosix_ID]/CPUs | how many CPU's the node has |
|
/proc/hpc/nodes/[openMosix_ID]/load | the openMosix load of this node |
| /proc/hpc/nodes/[openMosix_ID]/mem | available memory as openMosix believes |
| /proc/hpc/nodes/[openMosix_ID]/rmem | available memory as Linux believes |
| /proc/hpc/nodes/[openMosix_ID]/speed | speed of the node relative to PIII/1GHz |
| /proc/hpc/nodes/[openMosix_ID]/status | status of the node |
| /proc/hpc/nodes/[openMosix_ID]/tmem | available memory |
| /proc/hpc/nodes/[openMosix_ID]/util | utilization of the node |
Table 8-5. Additional Informations about local processes
|
/proc/[PID]/cantmove | reason why a process cannot be migrated |
| /proc/[PID]/goto | to which node the process should migrate |
| /proc/[PID]/lock | if a process is locked to its home node |
| /proc/[PID]/nmigs | how many times the process migrated |
| /proc/[PID]/where | where the process is currently being computed |
| /proc/[PID]/migrate | same as goto remote processes |
| /proc/hpc/remote/from | the home node of the process |
| /proc/hpc/remote/identity | additional informations about the process |
| /proc/hpc/remote/statm | memory statistic of the process |
| /proc/hpc/remote/stats | cpu statistics of the process
|
Take our 
