[rrd-developers] patch/tuning for very large RRD systems (was "Re: SQL Backend request")

[Mark Plaksin]

Dave Plonka <plonka at doit.wisc.edu> writes:

> Hi Tobi,
>
> This is one of those serendipitous occasions -
> I think we can save you perhaps lots of time:
>
> Archit Gupta, Dale Carder, and I have just comleted a research project
> on RRD performance and scalability.  I beleive we may have the largest
> single system MRTG w/RRD - over 300,000 targets and RRD files updated
> every five minutes.

Wow!  Would you describe the hardware you are running that on?  CPU,
RAM, disk, and anything else you think is relevant?

We have about 45k RRDs and our testing so far says the fadvise changes
are very nice--thanks!  We're also testing local disk (via cciss driver)
vs SAN storage.  Our current RRD server is pretty crushed io-wise.  So
far the SAN storage looks like a big win too.