[op5-users] Réf. : Re: Réf. : Re: Réf. : Re: Réf. : Re: Réf. : Re: Nagios start time delay with Merlin

[nicolas.raspail at bnpparibas.com]

op5-users-bounces at lists.op5.com wrote on 27/08/2009 10:44:54:

> nicolas.raspail at bnpparibas.com wrote:
> > op5-users-bounces at lists.op5.com wrote on 26/08/2009 14:53:40:
> > 
> >> Please test the beta5 of Merlin. The release-tag will be set where
> >> the beta5 tag is now, unless our testing uncover some truly amazing
> >> deficiency that we have so far been completely unable to spot (not
> >> very likely). In all likelihood, 0.6.2 will therefore be the same
> >> code as is in 0.6.2-beta5.
> >>
> >>> Right now, with NDO, my latencies seems to be stable with theses 
> > values
> >>> Service Check Execution Time:   0.04 / 30.02 / 0.372 sec
> >>> Service Check Latency:  0.00 / 1299.86 / 46.321 sec
> >>> Host Check Execution Time:      2.54 / 2.62 / 2.563 sec
> >>> Host Check Latency:     0.00 / 3.45 / 1.179 sec
> >>>
> >> That's a fairly high service check latency though. Hopefully Merlin
> >> will cope better than that.
> > 
> > Hello,
> > 
> > I have compiled and installed the new merlin 0.6.2-beta5 and it is
> > running for 30 minutes now.
> > 
> > Nagios start checking hosts/services immediately,
> 
> That's a good thing. How does merlin affect latency now?

After 4 hours, here is my results :

Service Check Execution Time:   0.05 / 30.02 / 0.420 sec
Service Check Latency:  0.00 / 12.95 / 0.669 sec
Host Check Execution Time:      2.54 / 2.92 / 2.569 sec
Host Check Latency:     0.01 / 1.73 / 0.455 sec
# Active Host / Service Checks: 1984 / 14669
# Passive Host / Service Checks:        0 / 0

> 
> > but I see a strange
> > behaviour of Merlin in the log file. Every 30/40s, the php importer is
> > run. In Ninja, I can see the number of services changing from 0 to
> > 14669, and the number of hosts from 0 to 1984. Does it mean that there
> > is no history of past events in Merlin ?
> > 
> 
> Correct. Ninja does not have yet have log-browsing capabilities, so
> there is no state history in Ninja. Look to our reporting tool for
> that.
> 

Ok. Do Merlin have some history functions like Ndo or not ? From what
I have see, it seems that is not the case, because the various tables
in the database don't grow like the one in NDO.

> > 
> > It seems that merlind receive an update in the IPC socket and run the
> > php importer soon ater. Is a normal behaviour in the beta5 version ?
> > 
> 
> Yes it is. It happens when an event packet is, for some reason, dropped.
> The module then backs off 15 seconds to let the daemon catch its breath
> and then sends an event which triggers a re-import of the status.
> This is a quirky workaround to a problem I'm debugging right now, which
> is that the merlin daemon for some reason takes too long to read even
> a single event (it seems to be 0.3 seconds + 0.1 second for each event
> in addition to the first one, which is totally unacceptable).

Ok, hope you will find the cause of this bug

I wish to thank you for your help in testing/deploying Merlin. Right now,
I have a Nagios setup that performs well for us and that can share its
data with other tools via Merlin.

I will keep an eye on your projet for the new version of Merlin and Ninja.

Regards

Nicolas




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