[rrd-developers] Integrating rrdcached with Ganglia

Bernard Li bernard at vanhpc.org
Fri Sep 26 01:35:16 CEST 2008

Dear all:

For those who are interested,I have written a Wiki page documenting
how to integrate rrdcached with Ganglia 3.1.x:


Comments/feedbacks welcome.



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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