Hi List!
We hacked an Icinga module to transfer our performance data into a Cassandra 
instance. We use an off-the-shelf message queue (0mq) to get the data there. 
Anybody interested in this solution? I could prepare a release during the 
weekend.

When looking at an rrd based solution (which we're using now), the deficits are:

  - changing data retention on the fly is not easily possible
  - upon a change in the data sources for a check, pnp4nagios will silently 
stop updating the rrd
  - in case the database can't keep up with the data written, icinga will not 
go into coma (happened with our old nagios)

We fixed these and got the following advantages for free:

  - writes to Cassandra are *way* faster than writes to mysql
  - on the other hand if you're really trying to break your equipment, data 
will be dropped from the message queue (without stopping Icinga) but can in 
theory be cached on disk

What we're presently planning:

  - connecting multiple icinga instances: use the message queue over slow links 
with disk backup, in case the link failes
  - rewrite check names on the message queue level, to connect various 
customers to our nagios instance, without allowing them to rewrite our checks 
(as nsca does)
  - extends the web interface and the Cassandra writer as to support a limited 
form of real time analytics for performance data

Regards, Mark

akquinet outsourcing gem. GmbH
Paul-Stritter-Weg 5 ▪ D-22297 Hamburg

Fon:        +49 (0)40-881 73-4243
Fax:        +49 (0)40-881 73-199
E-Mail:    [email protected] 
 www.akquinet.de

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akquinet outsourcing gGmbH, Hamburg
Geschäftsführung: Hartmut Clausen, Jens Ehlers, Klaus-Dieter Gerken
Amtsgericht Hamburg HRB 91384
USt.-Id. Nr.: DE 239 299 699


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