I wrote this a few years ago as an experiment to see if patterns in Nagios logs can be learned so that impending outages can be predicted. My experience running ops at Yahoo! for various properties made me cautiously optimistic that this was indeed possible. The system presented here uses DNF learning to try and figure out what alerts cause other alerts to occur. The results are interesting (qualified success), but more work is needed to make the system more robust.
See the transcript file. I originally trained the system on the Yahoo! ymon logs. Ymon is a port of Nagios, differences if any should be minimal.
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