[rrd-developers] Integrating rrdcached with Ganglia

[Tobias Oetiker]

Bernard,

I would NOT run a daemon that has to be able to write to files as
nobody. No files should be owned by 'nobody'. Since this user is
used for daemons that should not be able to write to any files on
the system for secirity reasons.

Create a special user for rrdcached and run it as that user ...

cheers
tobi



Yesterday Bernard Li wrote:

> Dear all:
>
> For those who are interested,I have written a Wiki page documenting
> how to integrate rrdcached with Ganglia 3.1.x:
>
> http://ganglia.wiki.sourceforge.net/rrdcached_integration
>
> Comments/feedbacks welcome.
>
> Thanks,
>
> Bernard
>
> On Wed, Sep 24, 2008 at 3:50 PM, Bernard Li <bernard at vanhpc.org> wrote:
> > Dear RRDTool and Ganglia developers:
> >
> > For the last few days I have been working on integrating rrdcached
> > with Ganglia and the preliminary results are pretty promising.
> >
> > On my benchmark server running gmetad, without rrdcached the load
> > would get way up there making the server unusable (due to high I/O
> > wait).  With rrdcached enabled, the load barely hit 2 and I/O wait is
> > low.
> >
> > I will post some more data later (maybe summary of `sar` output).
> >
> > For Ganglia, both gmetad and apache processes need to access the
> > rrdcached socket, so I had the socket owned by nobody chgrp it to
> > apache (also making it group-writable).
> >
> > If anybody is interested in testing this on EL4, I could post my RPMs.
> >  Code modification to Ganglia is pretty trivial.
> >
> > I look forward to the official release of rrdcached as part of an
> > upcoming rrdtool release!
> >
> > Special thanks to Florian, Kevin and Tobias for their hard work in
> > putting this together!
> >
> > Cheers,
> >
> > Bernard
> >
>
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>

-- 
Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland
http://it.oetiker.ch tobi at oetiker.ch ++41 62 775 9902 / sb: -9900