ServerNet Cluster Manual

SCF Commands for SNETMON and the ServerNet
Cluster Subsystem
ServerNet Cluster Manual—520575-003
8-24
Considerations
PAGES pages
designates how much memory space is allocated in the extended data segment
used for tracing. The trace will terminate after the number of pages of trace data
has been collected.
RECSIZE bytes
specifies the maximum size for any trace data record. Larger records are
truncated.
SELECT tracelevel
identifies the kind of trace data to be collected. Currently, only ALL is supported.
WRAP | NOWRAP
WRAP specifies that when the trace disk file end-of-file mark is reached, trace data
wraps around to the beginning of the file and overwrites any existing data.
If you omit this option, the default is for wrapping to be turned off (NOWRAP).
STOP
ends the current trace operation.
Considerations
•
Only a single ServerNet cluster monitor process trace can be running at any one
time in each process. Therefore the ServerNet cluster monitor process can have
two active traces, one in the primary process, and one in the backup process.
Each message monitor process can also run a simultaneous trace.
•
The BACKUP option takes effect immediately.
•
For more information on tracing, including the ranges and defaults of the attributes
listed above, see the PTrace Reference Manual.
Examples
•
The following SCF command starts a trace operation on the ServerNet cluster
monitor process and writes results into the file named $DATA.SNETMON.TRACE:
> TRACE PROCESS $ZZSCL, TO $DATA.SNETMON.TRACE
•
The following SCF command alters the previously started trace to allow trace data
to be overwritten when the end of file (EOF) is reached:
> TRACE PROCESS $ZZSCL, WRAP
•
The next example stops the trace:
> TRACE PROCESS $ZZSCL, STOP