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>Chapter 8. Administrating openMosix</TD
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>8.2. Configuration</H1
><P
>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.</P
><DIV
CLASS="TABLE"
><A
NAME="AEN579"
></A
><P
><B
>Table 8-1. Changing /proc/hpc parameters</B
></P
><TABLE
BORDER="1"
CLASS="CALSTABLE"
><TBODY
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
>echo 1 > /proc/hpc/admin/block</TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>blocks the arrival of remote processes</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
>echo 1 > /proc/hpc/admin/bring</TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>bring all migrated processes home</TD
></TR
></TBODY
></TABLE
></DIV
><P
>...</P
><DIV
CLASS="TABLE"
><A
NAME="AEN590"
></A
><P
><B
>Table 8-2. /proc/hpc/admin/</B
></P
><TABLE
BORDER="1"
CLASS="CALSTABLE"
><TBODY
><TR
><TD
ALIGN="LEFT"
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>(binary files) </TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
> config </TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
> the main configuration file (written by the setpe util)</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
>(flat files)</TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
> block </TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
> allow/forbid arrival of remote processes</TD
></TR
><TR
><TD
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> </TD
><TD
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> bring </TD
><TD
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VALIGN="TOP"
> bring home all migrated processes</TD
></TR
><TR
><TD
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> </TD
><TD
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>
dfsalinks </TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
> list of current symbolic dfsa-links</TD
></TR
><TR
><TD
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> </TD
><TD
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>
expel </TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
> sending guest processes home</TD
></TR
><TR
><TD
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> </TD
><TD
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>
gateways </TD
><TD
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VALIGN="TOP"
> maximum number of gateways</TD
></TR
><TR
><TD
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> </TD
><TD
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VALIGN="TOP"
>
lstay </TD
><TD
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VALIGN="TOP"
> local processes should stay </TD
></TR
><TR
><TD
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> </TD
><TD
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VALIGN="TOP"
>
mospe </TD
><TD
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VALIGN="TOP"
> contains the openMosix node id</TD
></TR
><TR
><TD
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> </TD
><TD
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>
nomfs </TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
> disables/enables MFS</TD
></TR
><TR
><TD
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> </TD
><TD
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>
overheads </TD
><TD
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VALIGN="TOP"
> for tuning</TD
></TR
><TR
><TD
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> </TD
><TD
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>
quiet </TD
><TD
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> stop collecting load-load-balancing informations</TD
></TR
><TR
><TD
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> </TD
><TD
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>
decay-interval </TD
><TD
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> interval for collecting informations about load-balancing</TD
></TR
><TR
><TD
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> </TD
><TD
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>
slow-decay </TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
> default 975</TD
></TR
><TR
><TD
ALIGN="LEFT"
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> </TD
><TD
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>
fast-decay </TD
><TD
ALIGN="LEFT"
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> default 926</TD
></TR
><TR
><TD
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> </TD
><TD
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>
speed </TD
><TD
ALIGN="LEFT"
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> speed relative to PIII/1GHz)</TD
></TR
><TR
><TD
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> </TD
><TD
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VALIGN="TOP"
>
stay </TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
> enables/disables automatic process migration</TD
></TR
></TBODY
></TABLE
></DIV
><DIV
CLASS="TABLE"
><A
NAME="AEN658"
></A
><P
><B
>Table 8-3. Writing a 1 to the following files /proc/hpc/decay/</B
></P
><TABLE
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CLASS="CALSTABLE"
><TBODY
><TR
><TD
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> clear </TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
> clears the decay statistics</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
> cpujob </TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
> tells openMosix that the process is cpu-bound</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
> iojob </TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
> tells openMosix that the process is io-bound</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
> slow </TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
> tells openMosix to decay its statistics slow</TD
></TR
><TR
><TD
ALIGN="LEFT"
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> fast </TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
> tells openMosix to decay its statistics fast</TD
></TR
></TBODY
></TABLE
></DIV
><DIV
CLASS="TABLE"
><A
NAME="AEN677"
></A
><P
><B
>Table 8-4. Informations about the other nodes</B
></P
><TABLE
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><TBODY
><TR
><TD
ALIGN="LEFT"
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>/proc/hpc/nodes/[openMosix_ID]/CPUs </TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
> how many CPU's the node has</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
> /proc/hpc/nodes/[openMosix_ID]/load </TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
> the openMosix load of this node</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
>/proc/hpc/nodes/[openMosix_ID]/mem </TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
> available memory as openMosix believes</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
>/proc/hpc/nodes/[openMosix_ID]/rmem </TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
> available memory as Linux believes</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
>/proc/hpc/nodes/[openMosix_ID]/speed </TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
> speed of the node relative to PIII/1GHz</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
>/proc/hpc/nodes/[openMosix_ID]/status </TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
> status of the node</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
>/proc/hpc/nodes/[openMosix_ID]/tmem </TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
> available memory</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
>/proc/hpc/nodes/[openMosix_ID]/util </TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
> utilization of the node</TD
></TR
></TBODY
></TABLE
></DIV
><DIV
CLASS="TABLE"
><A
NAME="AEN705"
></A
><P
><B
>Table 8-5. Additional Informations about local processes</B
></P
><TABLE
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><TBODY
><TR
><TD
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> /proc/[PID]/cantmove </TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
> reason why a process cannot be migrated</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
>/proc/[PID]/goto </TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
> to which node the process should migrate</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
>/proc/[PID]/lock </TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>if a process is locked to its home node</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
>/proc/[PID]/nmigs </TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>how many times the process migrated</TD
></TR
><TR
><TD
ALIGN="LEFT"
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>/proc/[PID]/where </TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>where the process is currently being computed</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
>/proc/[PID]/migrate </TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>same as goto remote processes</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
>/proc/hpc/remote/from </TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>the home node of the process</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
>/proc/hpc/remote/identity </TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>additional informations about the process</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
>/proc/hpc/remote/statm </TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>memory statistic of the process</TD
></TR
><TR
><TD
ALIGN="LEFT"
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>/proc/hpc/remote/stats </TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>cpu statistics of the process </TD
></TR
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