NSCA using PROCESS_FILE

[Ethan Galstad]

Any takers (Thomas?) on writing a HOWTO on doing this?  I was going to 
write up some documentation on doing bulk transfers with NSCA and using 
the perfdata files for data output.  Since I'm busy with Nagios 3 docs, 
this will have to wait a week or so.

If someone wants to write a HOWTO first, I'll ship them an 
as-yet-unreleased new Nagios t-shirt that is sure to get me and anyone 
who wears it in trouble with the NSA or the Department of Homeland 
Security. :-)

Here's what I was going to writeup:

1. Use perfdata file to write passive check information to a file in the 
format used by send_nsca

2. Rotate the perfdata file every 60 seconds

3. A cron job runs every minute and pipes the rotated perfdata file to 
the send_nsca client.

Bam - bulk data transfer at 60 second intervals.  This should help on 
both the central and distributed servers.  A better performance increase 
will happen when the NSCA daemon uses the PROCESS_FILE command when it 
receives bulk results from the send_nsca clients.


Gerd Mueller wrote:
> We are already using ocsp sweeper from nagiosexchange. (at Ton: we need ochp as well) This improves the performce. but we still have latencies upto 100 sec. :( So I would call this just a workaround.
> 
> Gerd
> -- Ursprüngl. Mitteil. --
> Betreff:	Re: [Nagios-devel] NSCA using PROCESS_FILE
> Von:	"Thomas Guyot-Sionnest" <Thomas at zango.com>
> Datum:		22.02.2007 18:54
> 
> If I were you I'd use Nagios ability to write performance data to a
> file/pipe for ohcp/oscp functionality.
> 
> Send the data to a pipe and have a Perl (Or anything else you want) daemon
> read that pipe and spawn send_nsca processes. One good thing with that also
> is that you could send batch updates since send_nsca can receive multiple
> results in a single run.
> 
> Thomas
> 
>> -----Original Message-----
>> From: nagios-devel-bounces at lists.sourceforge.net 
>> [mailto:nagios-devel-bounces at lists.sourceforge.net] On Behalf 
>> Of Gerd Mueller
>> Sent: February 22, 2007 10:56
>> To: Nagios Developers List
>> Subject: Re: [Nagios-devel] NSCA using PROCESS_FILE
>>
>>
>> Am Dienstag, den 20.02.2007, 08:48 -0600 schrieb Ethan Galstad:
>>> Gerd Mueller wrote:
>>>> Hi list!
>>>>
>>>> Is there a nsca which supports already the Nagios3 
>> external command
>>>> PROCESS_FILE? Or any suggestions how to use PROCESS_FILE for
>>>> inter-Nagios-communication with ohcp/oscp? 
>>>>
>>>> Cheers,
>>>>
>>>> Gerd  
>>> NSCA hasn't been modified to use the new PROCESS_FILE 
>> command, but I'll 
>>> start working on that in the next few weeks.  Right now I'm 
>>> concentrating on documentation.
>> I really need this new nsca feature. Inter-master-slaves communication
>> in our test environment (about 3000 hosts and livesystem will 
>> have much
>> more hosts) via nsca causes the slaves' latency to grow massiv (up to
>> hours!). Whereas a slave with same hardware and same amount of checks
>> but without any ocsp/ochp does nearly nothing (latency < 1sec.!). 
>>
>> I think the major bottleneck - the serial execution of ocsp/ochp still
>> exists in Nagios3. So Ton's comment on this
>> (http://altinity.blogs.com/dotorg/2006/11/caching_nsca_da.html)  is
>> still true.  
>>
>> I expect the new PROCESS_FILE option to avoid this bottleneck. The new
>> nsca client has to be fast enough without any slowing down the slave
>> itself while reading and caching. But I really would appreciate if the
>> main cause of the problem - the ocsp/ohcp executions - could be
>> deserialized.
>>
>> Let me now if I can support the development with testing, coding, ...
>>
>> Gerd
>>



Ethan Galstad,
Nagios Developer
---
Email: nagios at nagios.org
Website: http://www.nagios.org

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