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Re: [Nagios-users] RE: [Nagios-devel] MSQL Tables and log files mis-match in data types, any ideas

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Re: [Nagios-users] RE: [Nagios-devel] MSQL Tables and log files mis-match in data types, any ideas

Postby Guest » Fri Mar 29, 2002 1:06 am

Ethan Galstad (nagios) writes:
> I've updated the "upcoming" page (http://www.nagios.org/upcoming.php)
> to reflect a bit of what I was thinking. Dumping data into a DB
> would be handled by an external daemon of some kind.

So, would this be some kind of API that all CGIs and the core would
share, but would be completely abstract ? I'm thinking about some
normalized set of functions to put/get the data (get_host_info(),
update_host_info(), ...), which could very well be implemented on
the back-end as DB, DBM, flat file, ...

A comment on "Apache Module For Faster CGIs?" at
http://www.nagios.org/upcoming.php

You say:

"The reason for the major slowdown is the fact that the CGIs re-parse
all the configuration files every time they're hit. This is very
expensive CPU-wise when you've got a large number of hosts/services
in your configuration."

And you suggest as a possible solution:

"I'm not exactly sure what to do about this, but one solution might be to
write an Apache module that caches the config information (and possibly
the status information) in memory, refreshing it at set intervals (say
15 seconds or so, only when needed). The CGIs would then read the
cached config/status data from the module rather than parsing the raw
config files and status data all themselves."

I read you right, each CGI would talk with a "mod_nagios" every
time they were called, and get the cooked configuration passed to them.

The approach is the right one (pre process the config info), but
I don't know if making it Apache specific is the best way -- possibly
another way would be to use a persistent handler for the whole hierarchy
(.../nagios/).

Phil

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Original poster: regnauld@catpipe.net
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