rotate_ndo_log

[Andrey Dmitriev]

FYI, we have 266 hosts and 2744 services currently.

This default setup didn't work very well for us with large volume of 
events affecting already overloaded mysql instance. Also it caused 
slight delays in Nagios restarts and processing as the process is 
syncronous - Nagios was waiting on event broker / db writes.

So currently it's setup with a 'buffer' file in the middle of 
processing:

ndomod records events into a flat file 
/usr/local/groundwork/nagios/var/ndo.dat 

every 15 minutes Nagios runs another event broker command, 
rotate_ndo_log, which moves data from the flat file above to Unix socket 
read by ndo2db: 

/gw/nagios/bin/file2sock -s /gw/nagios/var/ndo.dat -d 
/gw/nagios/var/ndo.sock -t unix && /bin/mv /gw/nagios/var/ndo.dat 
/gw/nagios/var/ndo.`date +%s`

This works well and gives a slight performance boost, however, from time 
to time it seems rotate command doesn't execute properly and ndo.dat 
file does not get rotated. Then, when that happens, file grows and every 
rotate_ndo_log execution takes longer and longer, until it exceeds it's 
timeout in nagios. And at that point, normal processing can only be 
restored by hand. It is not much of a problem in short term however, as 
no data is actually lost - file2sock and rotationg may be done manually 
w/o the timeout.

Any clue as to why rorate_ndo_log would not work as expected?


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