hostchecks executing in parallel?

Percy Jahn jahn at kima.mv.ad.uni-kl.de
Fri Feb 25 23:15:33 CET 2005


Hello ,

  were monitoring hosts with about 10 services per host (interval of 5
  minutes / retry interval of 1 minute). If some network goes down and many
  host are unreachable, nagios checks every(10) service for on host in an
  interval of 5 minutes (Its HARD down, i suppose). And if one servicecheck
  fails (and this should happen, because its unreachable) it will execute a
  hostcheck for this host. This means, nagios is executing 10 hostchecks
  per "down" host in an  interval of 5 minutes? Right?

  Nagios doesnt execute host checks in parallel, isnt it?

  Every hostcheck has an plugin timeout of 30 seconds, which in other words
  means that only 2 hostchecks per minute are possible. (or 10 checks per 5
  Minutes).

  Were monitoring about 500 hosts with 3000 services. Timings (max_checks,
  interval, ...) are calculated as outlined in the doumentation. If some
  network fails (lets say 50 hosts), nagios is only making hostchecks, isnt
  it?

  And to notify the network operation control, it takes about 50 * 30s = 25
  minutes.
  Is this the intended behaviour?
  I cant work with dependencies, because i didnt get the needed
  information.
  Or is there something ive dont understand.

--
Best regards
Percy Jahn



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