[gpfsug-discuss] Potential problems - leaving trace enabled in over-write mode?

Oesterlin, Robert Robert.Oesterlin at nuance.com
Tue Mar 7 20:32:32 GMT 2017


I’m considering enabling trace on all nodes all the time, doing something like this:

mmtracectl --set --trace=def --trace-recycle=global --tracedev-write-mode=overwrite --tracedev-overwrite-buffer-size=256M
mmtracectl --start

My questions are:

- What is the performance penalty of leaving this on 100% of the time on a node?
- Does anyone have any suggestions on automation on stopping trace when a particular event occurs?
- What other issues, if any?


Bob Oesterlin
Sr Principal Storage Engineer, Nuance
507-269-0413


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