On Tue, Oct 30, 2007 at 12:32:42PM +0300, Dmitry Morozovsky wrote: > On Mon, 29 Oct 2007, Brooks Davis wrote: > > BD> On Mon, Oct 29, 2007 at 11:13:09AM +0300, Dmitry Morozovsky wrote: > BD> > > BD> > [hmm, after thinking a bit I decided it would be more appropriate here, > in > BD> > [EMAIL PROTECTED] > BD> > > BD> > Dear colleagues, > BD> > > BD> > any hints to tune rrdtool with ~30k rrd files (approx 2k target > devices)? > BD> > > BD> > machine is mostly IO-bound, showing 100% disk load with 8 or sometimes > even 3 > BD> > mB/s, 300-400 tps (it's 2 SATA300 disks in gmirror) > BD> > BD> Store it on a memory file system and take periodic snapshots. The format > is > BD> hopeless for large numbers of updates. The ganglia port's startup > scripts show > BD> an example of doing this. > > I thought about this, but total size of these files is already more than > memory, and I'm not sure md would be suitable for this.
FWIW, this is the only work around ganglia users have found. You might consider a solid state disk or one of the battery backed RAM cards out there if adding more memory and switching to a 64-bit OS isn't an option. -- Brooks
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