[rrd-developers] rrdupates per second

[Tobias Oetiker]

Hi Bernhard,

Yesterday Bernard Li wrote:
>
> I will dig deeper to confirm whether my OS (CentOS 4.x) supports
> fadvise and whether the rrdtool RPM was built correctly with that
> option enabled.

centos runs on some vintage 2.6.9 kernel (?) it may be that the
fadvise implementation there is not working correctly.

dave plonka wrote a little tool that lets you check if the fadvise
stuff is working ...

http://net.doit.wisc.edu/~plonka/fincore/

http://net.doit.wisc.edu/~plonka/fadvise/

cheers

tobi



> > does this mean ganglia calls rrd_update and links librrd ? or does
> > it call out?
>
> Yes, that is the case AFAIK.  The code in question is viewable here:
>
> http://ganglia.svn.sourceforge.net/viewvc/ganglia/branches/monitor-core-3.1/gmetad/rrd_helpers.c?view=markup
>
> Thanks,
>
> Bernard
>
>

-- 
Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten
http://it.oetiker.ch tobi at oetiker.ch ++41 62 213 9902