Hi Howard:

On Mon, Sep 29, 2008 at 9:59 AM, howard chen <[EMAIL PROTECTED]> wrote:

> Where the ganglia data came from?

Ganglia metrics are collected via the gmond daemon.

The gmetad daemon polls gmond daemon(s) for the metrics and they are
stored in RRD format.  The web frontend then graphs the data from the
RRD files and present that to your web browser.

> All from its own client daemon, so in a production server, will the
> server using too many resources in gathering all those resources, e.g.
> sar, nagios etc.
>
> Any recommended settings for reducing server overhead then?

Ganglia in general does not use up a lot of resources (well, this is
relative, it depends on what you are trying to do).

Perhaps you can read more about how Ganglia works:

http://ganglia.wiki.sourceforge.net/

then come back and let us know how you plan to use it and specific
concerns you may have.

Thanks,

Bernard

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