We switched our ganglia servers to SSDs - they're cheap enough now, and it totally fixed our I/O Wait issues related to disk. I haven't hit the UDP boundaries yet.
Jonah Horowitz · Monitoring Manager · [email protected] W (415) 348-7694 · M (415) 763-5564 LookSmart · Smart Choices. Made Easy. 55 Second Street Suite 700, San Francisco, CA 94105 Winner of the 2008 SES Award for Best Search Engine Ad Platform > -----Original Message----- > From: Kostas Georgiou [mailto:[email protected]] > Sent: Saturday, February 20, 2010 11:10 AM > To: [email protected] > Subject: Re: [Ganglia-general] experiences scaling to 150k metrics > > On Fri, Feb 19, 2010 at 11:08:41AM -0800, Bernard Li wrote: > > > On Thu, Feb 18, 2010 at 7:41 PM, Scott Dworkis <[email protected]> > wrote: > > > > > i tried the tmpfs thing (actually /dev/ramN), but decided syncing > back and > > > forth to disks to preserve data across reboots was suboptimal. > never tried > > > rrdcached. > > > > Yeah that's one of the downside of the tmpfs route. Definitely give > > rrdcached a try and report back your experiences. > > There is also the option to tell the fs to push writes out less > frequently, which results to far less IO traffic. For ext3 mounting > with > something like "noatime,data=writeback,commit=60" is a good start. The > likelihood of data/filesystem corruption after a power failure is most > likely higher but on the other hand unlike rrdcached you still get > access to the latest data when you read an rrd file. > > Cheers, > Kostas Georgiou > > ----------------------------------------------------------------------- > ------- > Download Intel® Parallel Studio Eval > Try the new software tools for yourself. Speed compiling, find bugs > proactively, and fine-tune applications for parallel performance. > See why Intel Parallel Studio got high marks during beta. > http://p.sf.net/sfu/intel-sw-dev > _______________________________________________ > Ganglia-general mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/ganglia-general ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Ganglia-general mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/ganglia-general
